diff --git a/.github/contributing.md b/.github/contributing.md new file mode 100644 index 0000000..6cf9168 --- /dev/null +++ b/.github/contributing.md @@ -0,0 +1,17 @@ +# Bugs, Questions, and Feature Requests + +Report bugs, ask questions, and request features using [GitHub Issues](https://github.com/cferdinandi/smooth-scroll/issues). + +**Before posting, do a search to make sure your issue or question hasn't already been reported or discussed.** If no matching issue exists, go ahead and create one. + +**Please be sure to include all of the following:** + +1. A clear, descriptive title (ie. "A bug" is not a good title). +2. [A reduced test case.](https://css-tricks.com/reduced-test-cases/) + - Clearly demonstrate the bug or issue. + - Include the bare minimum HTML, CSS, and JavaScript required to demonstrate the bug. + - A link to your production site is **not** a reduced test case. + - You can create one by [forking this CodePen](https://codepen.io/cferdinandi/pen/RqGLpz). +3. The browser and OS that you're using. + +Duplicates and issues without a reduced test case may be closed without comment. \ No newline at end of file diff --git a/.github/issue_template.md b/.github/issue_template.md new file mode 100755 index 0000000..664bfaa --- /dev/null +++ b/.github/issue_template.md @@ -0,0 +1,3 @@ + + +**Test case:** https://codepen.io/cferdinandi/pen/RqGLpz \ No newline at end of file diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml new file mode 100644 index 0000000..42b06b4 --- /dev/null +++ b/.github/workflows/push.yml @@ -0,0 +1,13 @@ +on: push +name: publish on release +jobs: + publish: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@master + - name: publish + uses: actions/npm@master + env: + NPM_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }} + with: + args: publish diff --git a/.gitignore b/.gitignore index 496ee2c..62fb128 100644 --- a/.gitignore +++ b/.gitignore @@ -1 +1,10 @@ -.DS_Store \ No newline at end of file +# Node +node_modules +test/results +test/coverage + +## OS X +.DS_Store +._* +.Spotlight-V100 +.Trashes \ No newline at end of file diff --git a/.travis.yml b/.travis.yml new file mode 100755 index 0000000..09ce0fd --- /dev/null +++ b/.travis.yml @@ -0,0 +1,6 @@ +language: node_js +node_js: + - "7" +before_script: + - npm install -g gulp +script: gulp \ No newline at end of file diff --git a/LICENSE.md b/LICENSE.md new file mode 100755 index 0000000..b5e8ef7 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,21 @@ +# The MIT License (MIT) + +Copyright (c) Go Make Things, LLC + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. \ No newline at end of file diff --git a/README.md b/README.md index df1c07c..ed77c95 100755 --- a/README.md +++ b/README.md @@ -1,260 +1,404 @@ -# Smooth Scroll -A lightweight script to animate scrolling to anchor links. [View the demo](http://cferdinandi.github.io/smooth-scroll/). +**DEPRECATION NOTICE:** -**In This Documentation** +Smooth Scroll is, without a doubt, my most popular and widely used plugin. -1. [Getting Started](#getting-started) -2. [Options & Settings](#options-and-settings) -3. [Browser Compatibility](#browser-compatibility) -4. [Contributors](#contributors) -5. [License](#license) -6. [Changelog](#changelog) -7. [Older Docs](#older-docs) +But in the time since I created it, a CSS-only method for smooth scrolling has emerged, and now has fantastic browser support. It can do things this plugin can't (like scrolling to anchor links from another page), and addresses bugs and limitations in the plugin that I have never gotten around to fixing. +This plugin has run its course, and the browser now offers a better, more feature rich and resilient solution out-of-the-box. + +Learn [how to animate scrolling to anchor links with one line of CSS](https://gomakethings.com/how-to-animate-scrolling-to-anchor-links-with-one-line-of-css/), and [how to prevent anchor links from scrolling behind fixed or sticky headers](https://gomakethings.com/how-to-prevent-anchor-links-from-scrolling-behind-a-sticky-header-with-one-line-of-css/). + +Thanks for the years of support! + +--- + +# Smooth Scroll [![Build Status](https://travis-ci.org/cferdinandi/smooth-scroll.svg)](https://travis-ci.org/cferdinandi/smooth-scroll) +A lightweight script to animate scrolling to anchor links. Smooth Scroll works great with [Gumshoe](https://github.com/cferdinandi/gumshoe). + +**[View the Demo on CodePen →](https://codepen.io/cferdinandi/pen/wQzrdM)** + +[Getting Started](#getting-started) | [Scroll Speed](#scroll-speed) | [Easing Options](#easing-options) | [API](#api) | [What's new?](#whats-new) | [Known Issues](#known-issues) | [Browser Compatibility](#browser-compatibility) | [License](#license) + +*__Quick aside:__ you might not need this library. There's [a native CSS way to handle smooth scrolling](https://gomakethings.com/smooth-scrolling-links-with-only-css/) that might fit your needs.* + + +
+ +### Want to learn how to write your own vanilla JS plugins? Check out my [Vanilla JS Pocket Guides](https://vanillajsguides.com/) or join the [Vanilla JS Academy](https://vanillajsacademy.com) and level-up as a web developer. 🚀 + +
## Getting Started +Compiled and production-ready code can be found in the `dist` directory. The `src` directory contains development code. + ### 1. Include Smooth Scroll on your site. +There are two versions of Smooth Scroll: the standalone version, and one that comes preloaded with polyfills for `closest()`, `requestAnimationFrame()`, and `CustomEvent()`, which are only supported in newer browsers. + +If you're including your own polyfills or don't want to enable this feature for older browsers, use the standalone version. Otherwise, use the version with polyfills. + +**Direct Download** + +You can [download the files directly from GitHub](https://github.com/cferdinandi/smooth-scroll/archive/master.zip). + +```html + +``` + +**CDN** + +You can also use the [jsDelivr CDN](https://cdn.jsdelivr.net/gh/cferdinandi/smooth-scroll/dist/). I recommend linking to a specific version number or version range to prevent major updates from breaking your site. Smooth Scroll uses semantic versioning. + ```html - + + + + + + + + + + + + +``` + +**NPM** + +You can also use NPM (or your favorite package manager). + +```bash +npm install smooth-scroll ``` ### 2. Add the markup to your HTML. +No special markup needed—just standard anchor links. Give the anchor location an ID just like you normally would. + ```html Anchor Link ... -Bazinga! +
Bazinga!
``` -Turn anchor links into Smooth Scroll links by adding the `[data-scroll]` data attribute. Give the anchor location an ID just like you normally would. +***Note:*** *Smooth Scroll does not work with `` style anchors. It requires IDs.* ### 3. Initialize Smooth Scroll. +In the footer of your page, after the content, initialize Smooth Scroll by passing in a selector for the anchor links that should be animated. And that's it, you're done. Nice work! + ```html ``` -In the footer of your page, after the content, initialize Smooth Scroll. And that's it, you're done. Nice work! +***Note:*** *The `a[href*="#"]` selector will apply Smooth Scroll to all anchor links. You can selectively target links using any other selector(s) you'd like. Smooth Scroll accepts multiple selectors as a comma separated list. Example: `'.js-scroll, [data-scroll], #some-link'`.* -## Options and Settings +## Scroll Speed -Smooth Scroll includes smart defaults and works right out of the box. But if you want to customize things, it also has a robust API that provides multiple ways for you to adjust the default options and settings. +Smooth Scroll allows you to adjust the speed of your animations with the `speed` option. -### Global Settings +This a number representing the amount of time in milliseconds that it should take to scroll 1000px. Scroll distances shorter than that will take less time, and scroll distances longer than that will take more time. The default is 300ms. -You can pass options and callbacks into Smooth Scroll through the `init()` function: +```js +var scroll = new SmoothScroll('a[href*="#"]', { + speed: 300 +}); +``` -```javascript -smoothScroll.init({ - speed: 500, // How fast to complete the scroll in milliseconds - easing: 'easeInOutCubic', // Easing pattern to use - updateURL: false, // Boolean. Whether or not to update the URL with the anchor hash on scroll - callbackBefore: function ( toggle, anchor ) {}, // Function to run before scrolling - callbackAfter: function ( toggle, anchor ) {} // Function to run after scrolling +If you want all of your animations to take exactly the same amount of time (the value you set for `speed`), set the `speedAsDuration` option to `true`. + +```js +// All animations will take exactly 500ms +var scroll = new SmoothScroll('a[href*="#"]', { + speed: 500, + speedAsDuration: true }); ``` -#### Easing Options + +## Easing Options + +Smooth Scroll comes with about a dozen common easing patterns. [Here's a demo of the different patterns.](https://codepen.io/cferdinandi/pen/jQMGaB) **Linear** *Moves at the same speed from start to finish.* -* `Linear` +- `Linear` **Ease-In** *Gradually increases in speed.* -* `easeInQuad` -* `easeInCubic` -* `easeInQuart` -* `easeInQuint` +- `easeInQuad` +- `easeInCubic` +- `easeInQuart` +- `easeInQuint` **Ease-In-Out** *Gradually increases in speed, peaks, and then gradually slows down.* -* `easeInOutQuad` -* `easeInOutCubic` -* `easeInOutQuart` -* `easeInOutQuint` +- `easeInOutQuad` +- `easeInOutCubic` +- `easeInOutQuart` +- `easeInOutQuint` **Ease-Out** *Gradually decreases in speed.* -* `easeOutQuad` -* `easeOutCubic` -* `easeOutQuart` -* `easeOutQuint` +- `easeOutQuad` +- `easeOutCubic` +- `easeOutQuart` +- `easeOutQuint` -Learn more about the different easing patterns and what they do at [easings.net](http://easings.net/). +You can also pass in your own custom easing pattern [using the `customEasing` option](#global-settings). -### Override settings with data attributes +```js +var scroll = new SmoothScroll('a[href*="#"]', { + // Function. Custom easing pattern + // If this is set to anything other than null, will override the easing option above + customEasing: function (time) { -Smooth Scroll also lets you override global settings on a link-by-link basis using the `[data-options]` data attribute: + // return -```html - - Anchor Link - + // Example: easeInOut Quad + return time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; + + } +}); +``` + + + +## API + +Smooth Scroll includes smart defaults and works right out of the box. But if you want to customize things, it also has a robust API that provides multiple ways for you to adjust the default options and settings. + +### Options and Settings + +You can pass options and callbacks into Smooth Scroll when instantiating. + +```javascript +var scroll = new SmoothScroll('a[href*="#"]', { + + // Selectors + ignore: '[data-scroll-ignore]', // Selector for links to ignore (must be a valid CSS selector) + header: null, // Selector for fixed headers (must be a valid CSS selector) + topOnEmptyHash: true, // Scroll to the top of the page for links with href="#" + + // Speed & Duration + speed: 500, // Integer. Amount of time in milliseconds it should take to scroll 1000px + speedAsDuration: false, // If true, use speed as the total duration of the scroll animation + durationMax: null, // Integer. The maximum amount of time the scroll animation should take + durationMin: null, // Integer. The minimum amount of time the scroll animation should take + clip: true, // If true, adjust scroll distance to prevent abrupt stops near the bottom of the page + offset: function (anchor, toggle) { + + // Integer or Function returning an integer. How far to offset the scrolling anchor location in pixels + // This example is a function, but you could do something as simple as `offset: 25` + + // An example returning different values based on whether the clicked link was in the header nav or not + if (toggle.classList.closest('.my-header-nav')) { + return 25; + } else { + return 50; + } + + }, + + // Easing + easing: 'easeInOutCubic', // Easing pattern to use + customEasing: function (time) { + + // Function. Custom easing pattern + // If this is set to anything other than null, will override the easing option above + + // return + + // Example: easeInOut Quad + return time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; + + }, + + // History + updateURL: true, // Update the URL on scroll + popstate: true, // Animate scrolling with the forward/backward browser buttons (requires updateURL to be true) + + // Custom Events + emitEvents: true // Emit custom events + +}); +``` + +### Custom Events + +Smooth Scroll emits three custom events: + +- `scrollStart` is emitted when the scrolling animation starts. +- `scrollStop` is emitted when the scrolling animation stops. +- `scrollCancel` is emitted if the scrolling animation is canceled. + +All three events are emitted on the `document` element and bubble up. You can listen for them with the `addEventListener()` method. The `event.detail` object includes the `anchor` and `toggle` elements for the animation. + +```js +// Log scroll events +var logScrollEvent = function (event) { + + // The event type + console.log('type:', event.type); + + // The anchor element being scrolled to + console.log('anchor:', event.detail.anchor); + + // The anchor link that triggered the scroll + console.log('toggle:', event.detail.toggle); + +}; + +// Listen for scroll events +document.addEventListener('scrollStart', logScrollEvent, false); +document.addEventListener('scrollStop', logScrollEvent, false); +document.addEventListener('scrollCancel', logScrollEvent, false); ``` -### Use Smooth Scroll events in your own scripts +### Methods -You can also call Smooth Scroll's scroll animation events in your own scripts: +Smooth Scroll also exposes several public methods. + +#### animateScroll() +Animate scrolling to an anchor. ```javascript -smoothScroll.animateScroll( - toggle, // Node that toggles the animation. ex. document.querySelector('#toggle') - anchor, // ID of the anchor to scroll to. ex. '#bazinga' - options, // Classes and callbacks. Same options as those passed into the init() function. - event // Optional, if a DOM event was triggered. +var scroll = new SmoothScroll(); +scroll.animateScroll( + anchor, // Node to scroll to. ex. document.querySelector('#bazinga') + toggle, // Node that toggles the animation, OR an integer. ex. document.querySelector('#toggle') + options // Classes and callbacks. Same options as those passed into the init() function. ); ``` **Example 1** ```javascript -smoothScroll.animateScroll( null, '#bazinga' ); +var scroll = new SmoothScroll(); +var anchor = document.querySelector('#bazinga'); +scroll.animateScroll(anchor); ``` **Example 2** ```javascript +var scroll = new SmoothScroll(); +var anchor = document.querySelector('#bazinga'); var toggle = document.querySelector('#toggle'); var options = { speed: 1000, easing: 'easeOutCubic' }; -smoothScroll.animateScroll( toggle, '#bazinga', options ); +scroll.animateScroll(anchor, toggle, options); +``` + +**Example 3** + +```javascript +// You can optionally pass in a y-position to scroll to as an integer +var scroll = new SmoothScroll(); +scroll.animateScroll(750); ``` +#### cancelScroll() +Cancel a scroll-in-progress. + +```javascript +var scroll = new SmoothScroll(); +scroll.cancelScroll(); +``` + +***Note:*** *This does not handle focus management. The user will stop in place, and focus will remain on the anchor link that triggered the scroll.* + +#### destroy() +Destroy the current initialization. This is called automatically in the `init` method to remove any existing initializations. + +```javascript +var scroll = new SmoothScroll(); +scroll.destroy(); +``` + + ### Fixed Headers -Add a `[data-scroll-header]` data attribute to fixed headers. Smooth Scroll will automatically offset scroll distances by the header height. If you have multiple fixed headers, add `[data-scroll-header]` to the last one in the markup. +If you're using a fixed header, Smooth Scroll will automatically offset scroll distances by the header height. Pass in a valid CSS selector for your fixed header as an option to the `init`. + +If you have multiple fixed headers, pass in the last one in the markup. ```html +... + ``` + +## What's new? + +Scroll duration now varies based on distance traveled. If you want to maintain the old scroll animation duration behavior, set the `speedAsDuration` option to `true`. + + + +## Known Issues + +### Reduce Motion Settings + +This isn't really an "issue" so-much as a question I get a lot. + +Smooth Scroll respects [the `Reduce Motion` setting](https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-reduced-motion) available in certain operating systems. In browsers that surface that setting, Smooth Scroll will not run and will revert to the default "jump to location" anchor link behavior. + +I've decided to respect user preferences of developer desires here. This is *not* a configurable setting. + +### `` styling + +If the `` element has been assigned a height of `100%` or `overflow: hidden`, Smooth Scroll is unable to properly calculate page distances and will not scroll to the right location. The `` element can have a fixed, non-percentage based height (ex. `500px`), or a height of `auto`, and an `overflow` of `visible`. + +### Animating from the bottom + +Animated scrolling links at the very bottom of the page (example: a "scroll to top" link) will stop animated almost immediately after they start when using certain easing patterns. This is an issue that's been around for a while and I've yet to find a good fix for it. I've found that `easeOut*` easing patterns work as expected, but other patterns can cause issues. [See this discussion for more details.](https://github.com/cferdinandi/smooth-scroll/issues/49) + +### Scrolling to an anchor link on another page + +This, unfortunately, cannot be done well. + +Most browsers instantly jump you to the anchor location when you load a page. You could use `scrollTo(0, 0)` to pull users back up to the top, and then manually use the `animateScroll()` method, but in my experience, it results in a visible jump on the page that's a worse experience than the default browser behavior. + + + ## Browser Compatibility Smooth Scroll works in all modern browsers, and IE 9 and above. -Smooth Scroll is built with modern JavaScript APIs, and uses progressive enhancement. If the JavaScript file fails to load, or if your site is viewed on older and less capable browsers, anchor links will jump the way they normally would. If you need to smooth scrolling for older browsers, [download the jQuery version of Smooth Scroll on GitHub](https://github.com/cferdinandi/smooth-scroll/tree/archive-v1). +Smooth Scroll is built with modern JavaScript APIs, and uses progressive enhancement. If the JavaScript file fails to load, or if your site is viewed on older and less capable browsers, anchor links will jump the way they normally would. +*__Note:__ Smooth Scroll will not run—even in supported browsers—if users have `Reduce Motion` enabled. [Learn more in the "Known Issues" section.](#reduce-motion-settings)* +### Polyfills -## Contributors +Support back to IE9 requires polyfills for `closest()`, `requestAnimationFrame()`, and `CustomEvent()`. Without them, support starts with Edge. -* Easing support contributed by [Willem Liu](https://github.com/willemliu). -* Easing functions forked from [Gaëtan Renaudeau](https://gist.github.com/gre/1650294). -* URL history support contributed by [Robert Pate](https://github.com/robertpateii). -* Fixed header support contributed by [Arndt von Lucadou](https://github.com/a-v-l). -* Infinite loop bugs in iOS and Chrome (when zoomed) by [Alex Guzman](https://github.com/alexguzman). -* IE10 rounding error fixed by [Luke Siedle](https://github.com/luke-siedle). -* Enhanced callback functions by [Constant Meiring](https://github.com/constantm). +Use the included polyfills version of Smooth Scroll, or include your own. ## License -Smooth Scroll is licensed under the [MIT License](http://gomakethings.com/mit/). - - - -## Changelog -* v4.4 - March 15, 2014 - * [Fixed iOS scroll-to-top bug](https://github.com/cferdinandi/smooth-scroll/issues/45). -* v4.3 - March 5, 2014 - * Added arguments to callback functions for greater versatility. [44](https://github.com/cferdinandi/smooth-scroll/pull/44) -* v4.2 - February 27, 2014 - * Fixed error for null `toggle` argument in `animateScroll` function ([43](https://github.com/cferdinandi/smooth-scroll/issues/43)). -* v4.1 - February 27, 2014 - * Converted `_defaults` to a literal object -* v4.0 - February 21, 2014 - * Better public/private method namespacing. - * Require `init()` call to run. - * New API exposes additional methods for use in your own scripts. - * Better documentation. -* v3.3 - February 19, 2014 - * [Add `offsettTop` to `offsetHeigh`t for `scrollHeader`. Allows for multiple fixed headers, or a fixed header that sits slightly below the top of the page.](https://github.com/cferdinandi/smooth-scroll/pull/36) -* v3.2 - February 10, 2014 - * [Fixes iOS infinite loop](https://github.com/cferdinandi/smooth-scroll/pull/35) and [Chrome browser zoom](https://github.com/cferdinandi/smooth-scroll/issues/31) bugs. -* v3.1 - February 4, 2014 - * Reverted to `Array.protype.foreach` loops. -* v3.0 - January 28, 2014 - * Switched to a data attribute for the toggle selector. - * Added namespacing to IIFE. - * Updated looping method and event listener. -* v2.19 - January 23, 2014 - * [Fix back button behavior in Chrome.](https://github.com/cferdinandi/smooth-scroll/issues/26#issuecomment-33172325) -* v2.18 - January 23, 2014 - * [Update URL before animation.](https://github.com/cferdinandi/smooth-scroll/pull/27) - * [Fix back button behavior in Firefox.](https://github.com/cferdinandi/smooth-scroll/issues/26) -* v2.17 - January 17, 2014 - * [Fixed back button behavior when using `data-url` feature.](https://github.com/cferdinandi/smooth-scroll/pull/18) -* v2.16 - January 16, 2014 - * [Updated variables for more accurate easing math when scrolling to top of page.](https://github.com/cferdinandi/smooth-scroll/pull/25#issuecomment-32566729) -* v2.15 - January 16, 2014 - * [Fixed bug that caused "scroll-to-top" animation to create endless loop.](https://github.com/cferdinandi/smooth-scroll/issues/24) -* v2.14 - January 15, 2014 - * [Fixed bug that caused animation to stop several pixels short.](https://github.com/cferdinandi/smooth-scroll/pull/15#issuecomment-32380770) -* v2.12 - January 7, 2014 - * [Added fixed header support.](https://github.com/cferdinandi/smooth-scroll/pull/20#issuecomment-31773547) -* v2.11 - January 4, 2014 - * [Change `offsetHeight` to `scrollHeight` to fix fixed/absolute positioning issues.](https://github.com/cferdinandi/smooth-scroll/pull/14) -* v2.10 - December 31, 2013 - * [Added URL history support.](https://github.com/cferdinandi/smooth-scroll/pull/17) -* v2.9 - December 9, 2013 - * [Added fixed for infinite loop when scrolling up.](https://github.com/cferdinandi/smooth-scroll/issues/13) -* v2.8 - December 3, 2013 - * [Fixed false distance reading.](https://github.com/cferdinandi/smooth-scroll/issues/11) - * Added linear easing as fallback when easing pattern not recognized to prevent script from failing. -* v2.7 - November 25, 2013 - * Converted naming conventions back to mathmatical roots (ex. `easeInCubic`) to remain consistent with development community language. -* v2.6 - November 26, 2013 - * Missing character was causing certain easing functions to break. -* v2.5 - November 22, 2013 - * Changed the default easing to `easeInOutNormal`. -* v2.4 - November 21, 2013 - * Added easing support with contributions from [Willem Liu](https://github.com/willemliu) and code from [Gaëtan Renaudeau](https://gist.github.com/gre/1650294). -* v2.3 - August 27, 2013 - * Added missing semicolons. - * Defined `animationStop` variable once, add values later. - * Activated strict mode. - * Wrapped in IIFE. -* v2.2 - August 17, 2013 - * Now you can set the animation speed with the `data-speed` attribute. (ex. `data-speed="400"`) -* v2.1 - August 17, 2013 - * Improvement animation function interval for smoother animation. - * Updated to allow for scrolling up the page. -* v2.0 - August 14, 2013 - * Converted to vanilla JavaScript. - * Removed dependency on jQuery. -* v1.1 - June 7, 2013 - * Switched to MIT license. -* v1.1 - May 18, 2013 - * Added jQuery noConflict mode. - * Updated tutorial. -* v1.0 - January 24, 2013 - * Initial release. - - - -## Older Docs - -* [Version 3](http://cferdinandi.github.io/smooth-scroll/archive/v3/) -* [Version 1](https://github.com/cferdinandi/smooth-scroll/tree/archive-v1) \ No newline at end of file + +The code is available under the [MIT License](LICENSE.md). \ No newline at end of file diff --git a/dist/smooth-scroll.js b/dist/smooth-scroll.js new file mode 100644 index 0000000..4984899 --- /dev/null +++ b/dist/smooth-scroll.js @@ -0,0 +1,629 @@ +/*! SmoothScroll v16.1.4 | (c) 2020 Chris Ferdinandi | MIT License | http://github.com/cferdinandi/smooth-scroll */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : + typeof define === 'function' && define.amd ? define(factory) : + (global = global || self, global.SmoothScroll = factory()); +}(this, (function () { 'use strict'; + + // + // Default settings + // + + var defaults = { + + // Selectors + ignore: '[data-scroll-ignore]', + header: null, + topOnEmptyHash: true, + + // Speed & Duration + speed: 500, + speedAsDuration: false, + durationMax: null, + durationMin: null, + clip: true, + offset: 0, + + // Easing + easing: 'easeInOutCubic', + customEasing: null, + + // History + updateURL: true, + popstate: true, + + // Custom Events + emitEvents: true + + }; + + + // + // Utility Methods + // + + /** + * Check if browser supports required methods + * @return {Boolean} Returns true if all required methods are supported + */ + var supports = function () { + return ( + 'querySelector' in document && + 'addEventListener' in window && + 'requestAnimationFrame' in window && + 'closest' in window.Element.prototype + ); + }; + + /** + * Merge two or more objects together. + * @param {Object} objects The objects to merge together + * @returns {Object} Merged values of defaults and options + */ + var extend = function () { + var merged = {}; + Array.prototype.forEach.call(arguments, function (obj) { + for (var key in obj) { + if (!obj.hasOwnProperty(key)) return; + merged[key] = obj[key]; + } + }); + return merged; + }; + + /** + * Check to see if user prefers reduced motion + * @param {Object} settings Script settings + */ + var reduceMotion = function () { + if ('matchMedia' in window && window.matchMedia('(prefers-reduced-motion)').matches) { + return true; + } + return false; + }; + + /** + * Get the height of an element. + * @param {Node} elem The element to get the height of + * @return {Number} The element's height in pixels + */ + var getHeight = function (elem) { + return parseInt(window.getComputedStyle(elem).height, 10); + }; + + /** + * Escape special characters for use with querySelector + * @author Mathias Bynens + * @link https://github.com/mathiasbynens/CSS.escape + * @param {String} id The anchor ID to escape + */ + var escapeCharacters = function (id) { + + // Remove leading hash + if (id.charAt(0) === '#') { + id = id.substr(1); + } + + var string = String(id); + var length = string.length; + var index = -1; + var codeUnit; + var result = ''; + var firstCodeUnit = string.charCodeAt(0); + while (++index < length) { + codeUnit = string.charCodeAt(index); + // Note: there’s no need to special-case astral symbols, surrogate + // pairs, or lone surrogates. + + // If the character is NULL (U+0000), then throw an + // `InvalidCharacterError` exception and terminate these steps. + if (codeUnit === 0x0000) { + throw new InvalidCharacterError( + 'Invalid character: the input contains U+0000.' + ); + } + + if ( + // If the character is in the range [\1-\1F] (U+0001 to U+001F) or is + // U+007F, […] + (codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F || + // If the character is the first character and is in the range [0-9] + // (U+0030 to U+0039), […] + (index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) || + // If the character is the second character and is in the range [0-9] + // (U+0030 to U+0039) and the first character is a `-` (U+002D), […] + ( + index === 1 && + codeUnit >= 0x0030 && codeUnit <= 0x0039 && + firstCodeUnit === 0x002D + ) + ) { + // http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point + result += '\\' + codeUnit.toString(16) + ' '; + continue; + } + + // If the character is not handled by one of the above rules and is + // greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or + // is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to + // U+005A), or [a-z] (U+0061 to U+007A), […] + if ( + codeUnit >= 0x0080 || + codeUnit === 0x002D || + codeUnit === 0x005F || + codeUnit >= 0x0030 && codeUnit <= 0x0039 || + codeUnit >= 0x0041 && codeUnit <= 0x005A || + codeUnit >= 0x0061 && codeUnit <= 0x007A + ) { + // the character itself + result += string.charAt(index); + continue; + } + + // Otherwise, the escaped character. + // http://dev.w3.org/csswg/cssom/#escape-a-character + result += '\\' + string.charAt(index); + + } + + // Return sanitized hash + return '#' + result; + + }; + + /** + * Calculate the easing pattern + * @link https://gist.github.com/gre/1650294 + * @param {Object} settings Easing pattern + * @param {Number} time Time animation should take to complete + * @returns {Number} + */ + var easingPattern = function (settings, time) { + var pattern; + + // Default Easing Patterns + if (settings.easing === 'easeInQuad') pattern = time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuad') pattern = time * (2 - time); // decelerating to zero velocity + if (settings.easing === 'easeInOutQuad') pattern = time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInCubic') pattern = time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutCubic') pattern = (--time) * time * time + 1; // decelerating to zero velocity + if (settings.easing === 'easeInOutCubic') pattern = time < 0.5 ? 4 * time * time * time : (time - 1) * (2 * time - 2) * (2 * time - 2) + 1; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInQuart') pattern = time * time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuart') pattern = 1 - (--time) * time * time * time; // decelerating to zero velocity + if (settings.easing === 'easeInOutQuart') pattern = time < 0.5 ? 8 * time * time * time * time : 1 - 8 * (--time) * time * time * time; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInQuint') pattern = time * time * time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuint') pattern = 1 + (--time) * time * time * time * time; // decelerating to zero velocity + if (settings.easing === 'easeInOutQuint') pattern = time < 0.5 ? 16 * time * time * time * time * time : 1 + 16 * (--time) * time * time * time * time; // acceleration until halfway, then deceleration + + // Custom Easing Patterns + if (!!settings.customEasing) pattern = settings.customEasing(time); + + return pattern || time; // no easing, no acceleration + }; + + /** + * Determine the document's height + * @returns {Number} + */ + var getDocumentHeight = function () { + return Math.max( + document.body.scrollHeight, document.documentElement.scrollHeight, + document.body.offsetHeight, document.documentElement.offsetHeight, + document.body.clientHeight, document.documentElement.clientHeight + ); + }; + + /** + * Calculate how far to scroll + * Clip support added by robjtede - https://github.com/cferdinandi/smooth-scroll/issues/405 + * @param {Element} anchor The anchor element to scroll to + * @param {Number} headerHeight Height of a fixed header, if any + * @param {Number} offset Number of pixels by which to offset scroll + * @param {Boolean} clip If true, adjust scroll distance to prevent abrupt stops near the bottom of the page + * @returns {Number} + */ + var getEndLocation = function (anchor, headerHeight, offset, clip) { + var location = 0; + if (anchor.offsetParent) { + do { + location += anchor.offsetTop; + anchor = anchor.offsetParent; + } while (anchor); + } + location = Math.max(location - headerHeight - offset, 0); + if (clip) { + location = Math.min(location, getDocumentHeight() - window.innerHeight); + } + return location; + }; + + /** + * Get the height of the fixed header + * @param {Node} header The header + * @return {Number} The height of the header + */ + var getHeaderHeight = function (header) { + return !header ? 0 : (getHeight(header) + header.offsetTop); + }; + + /** + * Calculate the speed to use for the animation + * @param {Number} distance The distance to travel + * @param {Object} settings The plugin settings + * @return {Number} How fast to animate + */ + var getSpeed = function (distance, settings) { + var speed = settings.speedAsDuration ? settings.speed : Math.abs(distance / 1000 * settings.speed); + if (settings.durationMax && speed > settings.durationMax) return settings.durationMax; + if (settings.durationMin && speed < settings.durationMin) return settings.durationMin; + return parseInt(speed, 10); + }; + + var setHistory = function (options) { + + // Make sure this should run + if (!history.replaceState || !options.updateURL || history.state) return; + + // Get the hash to use + var hash = window.location.hash; + hash = hash ? hash : ''; + + // Set a default history + history.replaceState( + { + smoothScroll: JSON.stringify(options), + anchor: hash ? hash : window.pageYOffset + }, + document.title, + hash ? hash : window.location.href + ); + + }; + + /** + * Update the URL + * @param {Node} anchor The anchor that was scrolled to + * @param {Boolean} isNum If true, anchor is a number + * @param {Object} options Settings for Smooth Scroll + */ + var updateURL = function (anchor, isNum, options) { + + // Bail if the anchor is a number + if (isNum) return; + + // Verify that pushState is supported and the updateURL option is enabled + if (!history.pushState || !options.updateURL) return; + + // Update URL + history.pushState( + { + smoothScroll: JSON.stringify(options), + anchor: anchor.id + }, + document.title, + anchor === document.documentElement ? '#top' : '#' + anchor.id + ); + + }; + + /** + * Bring the anchored element into focus + * @param {Node} anchor The anchor element + * @param {Number} endLocation The end location to scroll to + * @param {Boolean} isNum If true, scroll is to a position rather than an element + */ + var adjustFocus = function (anchor, endLocation, isNum) { + + // Is scrolling to top of page, blur + if (anchor === 0) { + document.body.focus(); + } + + // Don't run if scrolling to a number on the page + if (isNum) return; + + // Otherwise, bring anchor element into focus + anchor.focus(); + if (document.activeElement !== anchor) { + anchor.setAttribute('tabindex', '-1'); + anchor.focus(); + anchor.style.outline = 'none'; + } + window.scrollTo(0 , endLocation); + + }; + + /** + * Emit a custom event + * @param {String} type The event type + * @param {Object} options The settings object + * @param {Node} anchor The anchor element + * @param {Node} toggle The toggle element + */ + var emitEvent = function (type, options, anchor, toggle) { + if (!options.emitEvents || typeof window.CustomEvent !== 'function') return; + var event = new CustomEvent(type, { + bubbles: true, + detail: { + anchor: anchor, + toggle: toggle + } + }); + document.dispatchEvent(event); + }; + + + // + // SmoothScroll Constructor + // + + var SmoothScroll = function (selector, options) { + + // + // Variables + // + + var smoothScroll = {}; // Object for public APIs + var settings, toggle, fixedHeader, animationInterval; + + + // + // Methods + // + + /** + * Cancel a scroll-in-progress + */ + smoothScroll.cancelScroll = function (noEvent) { + cancelAnimationFrame(animationInterval); + animationInterval = null; + if (noEvent) return; + emitEvent('scrollCancel', settings); + }; + + /** + * Start/stop the scrolling animation + * @param {Node|Number} anchor The element or position to scroll to + * @param {Element} toggle The element that toggled the scroll event + * @param {Object} options + */ + smoothScroll.animateScroll = function (anchor, toggle, options) { + + // Cancel any in progress scrolls + smoothScroll.cancelScroll(); + + // Local settings + var _settings = extend(settings || defaults, options || {}); // Merge user options with defaults + + // Selectors and variables + var isNum = Object.prototype.toString.call(anchor) === '[object Number]' ? true : false; + var anchorElem = isNum || !anchor.tagName ? null : anchor; + if (!isNum && !anchorElem) return; + var startLocation = window.pageYOffset; // Current location on the page + if (_settings.header && !fixedHeader) { + // Get the fixed header if not already set + fixedHeader = document.querySelector(_settings.header); + } + var headerHeight = getHeaderHeight(fixedHeader); + var endLocation = isNum ? anchor : getEndLocation(anchorElem, headerHeight, parseInt((typeof _settings.offset === 'function' ? _settings.offset(anchor, toggle) : _settings.offset), 10), _settings.clip); // Location to scroll to + var distance = endLocation - startLocation; // distance to travel + var documentHeight = getDocumentHeight(); + var timeLapsed = 0; + var speed = getSpeed(distance, _settings); + var start, percentage, position; + + /** + * Stop the scroll animation when it reaches its target (or the bottom/top of page) + * @param {Number} position Current position on the page + * @param {Number} endLocation Scroll to location + * @param {Number} animationInterval How much to scroll on this loop + */ + var stopAnimateScroll = function (position, endLocation) { + + // Get the current location + var currentLocation = window.pageYOffset; + + // Check if the end location has been reached yet (or we've hit the end of the document) + if (position == endLocation || currentLocation == endLocation || ((startLocation < endLocation && window.innerHeight + currentLocation) >= documentHeight)) { + + // Clear the animation timer + smoothScroll.cancelScroll(true); + + // Bring the anchored element into focus + adjustFocus(anchor, endLocation, isNum); + + // Emit a custom event + emitEvent('scrollStop', _settings, anchor, toggle); + + // Reset start + start = null; + animationInterval = null; + + return true; + + } + }; + + /** + * Loop scrolling animation + */ + var loopAnimateScroll = function (timestamp) { + if (!start) { start = timestamp; } + timeLapsed += timestamp - start; + percentage = speed === 0 ? 0 : (timeLapsed / speed); + percentage = (percentage > 1) ? 1 : percentage; + position = startLocation + (distance * easingPattern(_settings, percentage)); + window.scrollTo(0, Math.floor(position)); + if (!stopAnimateScroll(position, endLocation)) { + animationInterval = window.requestAnimationFrame(loopAnimateScroll); + start = timestamp; + } + }; + + /** + * Reset position to fix weird iOS bug + * @link https://github.com/cferdinandi/smooth-scroll/issues/45 + */ + if (window.pageYOffset === 0) { + window.scrollTo(0, 0); + } + + // Update the URL + updateURL(anchor, isNum, _settings); + + // If the user prefers reduced motion, jump to location + if (reduceMotion()) { + adjustFocus(anchor, Math.floor(endLocation), false); + return; + } + + // Emit a custom event + emitEvent('scrollStart', _settings, anchor, toggle); + + // Start scrolling animation + smoothScroll.cancelScroll(true); + window.requestAnimationFrame(loopAnimateScroll); + + }; + + /** + * If smooth scroll element clicked, animate scroll + */ + var clickHandler = function (event) { + + // Don't run if event was canceled but still bubbled up + // By @mgreter - https://github.com/cferdinandi/smooth-scroll/pull/462/ + if (event.defaultPrevented) return; + + // Don't run if right-click or command/control + click or shift + click + if (event.button !== 0 || event.metaKey || event.ctrlKey || event.shiftKey) return; + + // Check if event.target has closest() method + // By @totegi - https://github.com/cferdinandi/smooth-scroll/pull/401/ + if (!('closest' in event.target)) return; + + // Check if a smooth scroll link was clicked + toggle = event.target.closest(selector); + if (!toggle || toggle.tagName.toLowerCase() !== 'a' || event.target.closest(settings.ignore)) return; + + // Only run if link is an anchor and points to the current page + if (toggle.hostname !== window.location.hostname || toggle.pathname !== window.location.pathname || !/#/.test(toggle.href)) return; + + // Get an escaped version of the hash + var hash; + try { + hash = escapeCharacters(decodeURIComponent(toggle.hash)); + } catch(e) { + hash = escapeCharacters(toggle.hash); + } + + // Get the anchored element + var anchor; + if (hash === '#') { + if (!settings.topOnEmptyHash) return; + anchor = document.documentElement; + } else { + anchor = document.querySelector(hash); + } + anchor = !anchor && hash === '#top' ? document.documentElement : anchor; + + // If anchored element exists, scroll to it + if (!anchor) return; + event.preventDefault(); + setHistory(settings); + smoothScroll.animateScroll(anchor, toggle); + + }; + + /** + * Animate scroll on popstate events + */ + var popstateHandler = function () { + + // Stop if history.state doesn't exist (ex. if clicking on a broken anchor link). + // fixes `Cannot read property 'smoothScroll' of null` error getting thrown. + if (history.state === null) return; + + // Only run if state is a popstate record for this instantiation + if (!history.state.smoothScroll || history.state.smoothScroll !== JSON.stringify(settings)) return; + + // Get the anchor + var anchor = history.state.anchor; + if (typeof anchor === 'string' && anchor) { + anchor = document.querySelector(escapeCharacters(history.state.anchor)); + if (!anchor) return; + } + + // Animate scroll to anchor link + smoothScroll.animateScroll(anchor, null, {updateURL: false}); + + }; + + /** + * Destroy the current initialization. + */ + smoothScroll.destroy = function () { + + // If plugin isn't already initialized, stop + if (!settings) return; + + // Remove event listeners + document.removeEventListener('click', clickHandler, false); + window.removeEventListener('popstate', popstateHandler, false); + + // Cancel any scrolls-in-progress + smoothScroll.cancelScroll(); + + // Reset variables + settings = null; + toggle = null; + fixedHeader = null; + animationInterval = null; + + }; + + /** + * Initialize Smooth Scroll + * @param {Object} options User settings + */ + var init = function () { + + // feature test + if (!supports()) throw 'Smooth Scroll: This browser does not support the required JavaScript methods and browser APIs.'; + + // Destroy any existing initializations + smoothScroll.destroy(); + + // Selectors and variables + settings = extend(defaults, options || {}); // Merge user options with defaults + fixedHeader = settings.header ? document.querySelector(settings.header) : null; // Get the fixed header + + // When a toggle is clicked, run the click handler + document.addEventListener('click', clickHandler, false); + + // If updateURL and popState are enabled, listen for pop events + if (settings.updateURL && settings.popstate) { + window.addEventListener('popstate', popstateHandler, false); + } + + }; + + + // + // Initialize plugin + // + + init(); + + + // + // Public APIs + // + + return smoothScroll; + + }; + + return SmoothScroll; + +}))); diff --git a/dist/smooth-scroll.min.js b/dist/smooth-scroll.min.js new file mode 100644 index 0000000..b3d1fe0 --- /dev/null +++ b/dist/smooth-scroll.min.js @@ -0,0 +1,2 @@ +/*! SmoothScroll v16.1.4 | (c) 2020 Chris Ferdinandi | MIT License | http://github.com/cferdinandi/smooth-scroll */ +!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e=e||self).SmoothScroll=t()}(this,(function(){"use strict";var e={ignore:"[data-scroll-ignore]",header:null,topOnEmptyHash:!0,speed:500,speedAsDuration:!1,durationMax:null,durationMin:null,clip:!0,offset:0,easing:"easeInOutCubic",customEasing:null,updateURL:!0,popstate:!0,emitEvents:!0},t=function(){var e={};return Array.prototype.forEach.call(arguments,(function(t){for(var n in t){if(!t.hasOwnProperty(n))return;e[n]=t[n]}})),e},n=function(e){"#"===e.charAt(0)&&(e=e.substr(1));for(var t,n=String(e),o=n.length,a=-1,i="",r=n.charCodeAt(0);++a=1&&t<=31||127==t||0===a&&t>=48&&t<=57||1===a&&t>=48&&t<=57&&45===r?i+="\\"+t.toString(16)+" ":i+=t>=128||45===t||95===t||t>=48&&t<=57||t>=65&&t<=90||t>=97&&t<=122?n.charAt(a):"\\"+n.charAt(a)}return"#"+i},o=function(){return Math.max(document.body.scrollHeight,document.documentElement.scrollHeight,document.body.offsetHeight,document.documentElement.offsetHeight,document.body.clientHeight,document.documentElement.clientHeight)},a=function(e){return e?(t=e,parseInt(window.getComputedStyle(t).height,10)+e.offsetTop):0;var t},i=function(e,t,n){0===e&&document.body.focus(),n||(e.focus(),document.activeElement!==e&&(e.setAttribute("tabindex","-1"),e.focus(),e.style.outline="none"),window.scrollTo(0,t))},r=function(e,t,n,o){if(t.emitEvents&&"function"==typeof window.CustomEvent){var a=new CustomEvent(e,{bubbles:!0,detail:{anchor:n,toggle:o}});document.dispatchEvent(a)}};return function(s,c){var u,l,d,f,m={};m.cancelScroll=function(e){cancelAnimationFrame(f),f=null,e||r("scrollCancel",u)},m.animateScroll=function(n,s,c){m.cancelScroll();var l=t(u||e,c||{}),h="[object Number]"===Object.prototype.toString.call(n),p=h||!n.tagName?null:n;if(h||p){var w=window.pageYOffset;l.header&&!d&&(d=document.querySelector(l.header));var g,y,v,S=a(d),E=h?n:function(e,t,n,a){var i=0;if(e.offsetParent)do{i+=e.offsetTop,e=e.offsetParent}while(e);return i=Math.max(i-t-n,0),a&&(i=Math.min(i,o()-window.innerHeight)),i}(p,S,parseInt("function"==typeof l.offset?l.offset(n,s):l.offset,10),l.clip),b=E-w,O=o(),I=0,M=function(e,t){var n=t.speedAsDuration?t.speed:Math.abs(e/1e3*t.speed);return t.durationMax&&n>t.durationMax?t.durationMax:t.durationMin&&n1?1:y),window.scrollTo(0,Math.floor(v)),function(e,t){var o=window.pageYOffset;if(e==t||o==t||(w=O)return m.cancelScroll(!0),i(n,t,h),r("scrollStop",l,n,s),g=null,f=null,!0}(v,E)||(f=window.requestAnimationFrame(A),g=e)};0===window.pageYOffset&&window.scrollTo(0,0),function(e,t,n){t||history.pushState&&n.updateURL&&history.pushState({smoothScroll:JSON.stringify(n),anchor:e.id},document.title,e===document.documentElement?"#top":"#"+e.id)}(n,h,l),"matchMedia"in window&&window.matchMedia("(prefers-reduced-motion)").matches?i(n,Math.floor(E),!1):(r("scrollStart",l,n,s),m.cancelScroll(!0),window.requestAnimationFrame(A))}};var h=function(e){if(!e.defaultPrevented&&!(0!==e.button||e.metaKey||e.ctrlKey||e.shiftKey)&&"closest"in e.target&&(l=e.target.closest(s))&&"a"===l.tagName.toLowerCase()&&!e.target.closest(u.ignore)&&l.hostname===window.location.hostname&&l.pathname===window.location.pathname&&/#/.test(l.href)){var t,o;try{t=n(decodeURIComponent(l.hash))}catch(e){t=n(l.hash)}if("#"===t){if(!u.topOnEmptyHash)return;o=document.documentElement}else o=document.querySelector(t);(o=o||"#top"!==t?o:document.documentElement)&&(e.preventDefault(),function(e){if(history.replaceState&&e.updateURL&&!history.state){var t=window.location.hash;t=t||"",history.replaceState({smoothScroll:JSON.stringify(e),anchor:t||window.pageYOffset},document.title,t||window.location.href)}}(u),m.animateScroll(o,l))}},p=function(){if(null!==history.state&&history.state.smoothScroll&&history.state.smoothScroll===JSON.stringify(u)){var e=history.state.anchor;"string"==typeof e&&e&&!(e=document.querySelector(n(history.state.anchor)))||m.animateScroll(e,null,{updateURL:!1})}};m.destroy=function(){u&&(document.removeEventListener("click",h,!1),window.removeEventListener("popstate",p,!1),m.cancelScroll(),u=null,l=null,d=null,f=null)};return function(){if(!("querySelector"in document&&"addEventListener"in window&&"requestAnimationFrame"in window&&"closest"in window.Element.prototype))throw"Smooth Scroll: This browser does not support the required JavaScript methods and browser APIs.";m.destroy(),u=t(e,c||{}),d=u.header?document.querySelector(u.header):null,document.addEventListener("click",h,!1),u.updateURL&&u.popstate&&window.addEventListener("popstate",p,!1)}(),m}})); diff --git a/dist/smooth-scroll.polyfills.js b/dist/smooth-scroll.polyfills.js new file mode 100644 index 0000000..3c98174 --- /dev/null +++ b/dist/smooth-scroll.polyfills.js @@ -0,0 +1,700 @@ +/*! SmoothScroll v16.1.4 | (c) 2020 Chris Ferdinandi | MIT License | http://github.com/cferdinandi/smooth-scroll */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : + typeof define === 'function' && define.amd ? define(factory) : + (global = global || self, global.SmoothScroll = factory()); +}(this, (function () { 'use strict'; + + /** + * closest() polyfill + * @link https://developer.mozilla.org/en-US/docs/Web/API/Element/closest#Polyfill + */ + if (window.Element && !Element.prototype.closest) { + Element.prototype.closest = function(s) { + var matches = (this.document || this.ownerDocument).querySelectorAll(s), + i, + el = this; + do { + i = matches.length; + while (--i >= 0 && matches.item(i) !== el) {} + } while ((i < 0) && (el = el.parentElement)); + return el; + }; + } + + /** + * CustomEvent() polyfill + * https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/CustomEvent#Polyfill + */ + (function () { + + if (typeof window.CustomEvent === "function") return false; + + function CustomEvent(event, params) { + params = params || { bubbles: false, cancelable: false, detail: undefined }; + var evt = document.createEvent('CustomEvent'); + evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail); + return evt; + } + + CustomEvent.prototype = window.Event.prototype; + + window.CustomEvent = CustomEvent; + })(); + + /** + * requestAnimationFrame() polyfill + * By Erik Möller. Fixes from Paul Irish and Tino Zijdel. + * @link http://paulirish.com/2011/requestanimationframe-for-smart-animating/ + * @link http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating + * @license MIT + */ + (function() { + var lastTime = 0; + var vendors = ['ms', 'moz', 'webkit', 'o']; + for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) { + window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame']; + window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || + window[vendors[x]+'CancelRequestAnimationFrame']; + } + + if (!window.requestAnimationFrame) { + window.requestAnimationFrame = function(callback, element) { + var currTime = new Date().getTime(); + var timeToCall = Math.max(0, 16 - (currTime - lastTime)); + var id = window.setTimeout(function() { callback(currTime + timeToCall); }, + timeToCall); + lastTime = currTime + timeToCall; + return id; + }; + } + + if (!window.cancelAnimationFrame) { + window.cancelAnimationFrame = function(id) { + clearTimeout(id); + }; + } + }()); + + // + // Default settings + // + + var defaults = { + + // Selectors + ignore: '[data-scroll-ignore]', + header: null, + topOnEmptyHash: true, + + // Speed & Duration + speed: 500, + speedAsDuration: false, + durationMax: null, + durationMin: null, + clip: true, + offset: 0, + + // Easing + easing: 'easeInOutCubic', + customEasing: null, + + // History + updateURL: true, + popstate: true, + + // Custom Events + emitEvents: true + + }; + + + // + // Utility Methods + // + + /** + * Check if browser supports required methods + * @return {Boolean} Returns true if all required methods are supported + */ + var supports = function () { + return ( + 'querySelector' in document && + 'addEventListener' in window && + 'requestAnimationFrame' in window && + 'closest' in window.Element.prototype + ); + }; + + /** + * Merge two or more objects together. + * @param {Object} objects The objects to merge together + * @returns {Object} Merged values of defaults and options + */ + var extend = function () { + var merged = {}; + Array.prototype.forEach.call(arguments, function (obj) { + for (var key in obj) { + if (!obj.hasOwnProperty(key)) return; + merged[key] = obj[key]; + } + }); + return merged; + }; + + /** + * Check to see if user prefers reduced motion + * @param {Object} settings Script settings + */ + var reduceMotion = function () { + if ('matchMedia' in window && window.matchMedia('(prefers-reduced-motion)').matches) { + return true; + } + return false; + }; + + /** + * Get the height of an element. + * @param {Node} elem The element to get the height of + * @return {Number} The element's height in pixels + */ + var getHeight = function (elem) { + return parseInt(window.getComputedStyle(elem).height, 10); + }; + + /** + * Escape special characters for use with querySelector + * @author Mathias Bynens + * @link https://github.com/mathiasbynens/CSS.escape + * @param {String} id The anchor ID to escape + */ + var escapeCharacters = function (id) { + + // Remove leading hash + if (id.charAt(0) === '#') { + id = id.substr(1); + } + + var string = String(id); + var length = string.length; + var index = -1; + var codeUnit; + var result = ''; + var firstCodeUnit = string.charCodeAt(0); + while (++index < length) { + codeUnit = string.charCodeAt(index); + // Note: there’s no need to special-case astral symbols, surrogate + // pairs, or lone surrogates. + + // If the character is NULL (U+0000), then throw an + // `InvalidCharacterError` exception and terminate these steps. + if (codeUnit === 0x0000) { + throw new InvalidCharacterError( + 'Invalid character: the input contains U+0000.' + ); + } + + if ( + // If the character is in the range [\1-\1F] (U+0001 to U+001F) or is + // U+007F, […] + (codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F || + // If the character is the first character and is in the range [0-9] + // (U+0030 to U+0039), […] + (index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) || + // If the character is the second character and is in the range [0-9] + // (U+0030 to U+0039) and the first character is a `-` (U+002D), […] + ( + index === 1 && + codeUnit >= 0x0030 && codeUnit <= 0x0039 && + firstCodeUnit === 0x002D + ) + ) { + // http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point + result += '\\' + codeUnit.toString(16) + ' '; + continue; + } + + // If the character is not handled by one of the above rules and is + // greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or + // is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to + // U+005A), or [a-z] (U+0061 to U+007A), […] + if ( + codeUnit >= 0x0080 || + codeUnit === 0x002D || + codeUnit === 0x005F || + codeUnit >= 0x0030 && codeUnit <= 0x0039 || + codeUnit >= 0x0041 && codeUnit <= 0x005A || + codeUnit >= 0x0061 && codeUnit <= 0x007A + ) { + // the character itself + result += string.charAt(index); + continue; + } + + // Otherwise, the escaped character. + // http://dev.w3.org/csswg/cssom/#escape-a-character + result += '\\' + string.charAt(index); + + } + + // Return sanitized hash + return '#' + result; + + }; + + /** + * Calculate the easing pattern + * @link https://gist.github.com/gre/1650294 + * @param {Object} settings Easing pattern + * @param {Number} time Time animation should take to complete + * @returns {Number} + */ + var easingPattern = function (settings, time) { + var pattern; + + // Default Easing Patterns + if (settings.easing === 'easeInQuad') pattern = time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuad') pattern = time * (2 - time); // decelerating to zero velocity + if (settings.easing === 'easeInOutQuad') pattern = time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInCubic') pattern = time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutCubic') pattern = (--time) * time * time + 1; // decelerating to zero velocity + if (settings.easing === 'easeInOutCubic') pattern = time < 0.5 ? 4 * time * time * time : (time - 1) * (2 * time - 2) * (2 * time - 2) + 1; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInQuart') pattern = time * time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuart') pattern = 1 - (--time) * time * time * time; // decelerating to zero velocity + if (settings.easing === 'easeInOutQuart') pattern = time < 0.5 ? 8 * time * time * time * time : 1 - 8 * (--time) * time * time * time; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInQuint') pattern = time * time * time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuint') pattern = 1 + (--time) * time * time * time * time; // decelerating to zero velocity + if (settings.easing === 'easeInOutQuint') pattern = time < 0.5 ? 16 * time * time * time * time * time : 1 + 16 * (--time) * time * time * time * time; // acceleration until halfway, then deceleration + + // Custom Easing Patterns + if (!!settings.customEasing) pattern = settings.customEasing(time); + + return pattern || time; // no easing, no acceleration + }; + + /** + * Determine the document's height + * @returns {Number} + */ + var getDocumentHeight = function () { + return Math.max( + document.body.scrollHeight, document.documentElement.scrollHeight, + document.body.offsetHeight, document.documentElement.offsetHeight, + document.body.clientHeight, document.documentElement.clientHeight + ); + }; + + /** + * Calculate how far to scroll + * Clip support added by robjtede - https://github.com/cferdinandi/smooth-scroll/issues/405 + * @param {Element} anchor The anchor element to scroll to + * @param {Number} headerHeight Height of a fixed header, if any + * @param {Number} offset Number of pixels by which to offset scroll + * @param {Boolean} clip If true, adjust scroll distance to prevent abrupt stops near the bottom of the page + * @returns {Number} + */ + var getEndLocation = function (anchor, headerHeight, offset, clip) { + var location = 0; + if (anchor.offsetParent) { + do { + location += anchor.offsetTop; + anchor = anchor.offsetParent; + } while (anchor); + } + location = Math.max(location - headerHeight - offset, 0); + if (clip) { + location = Math.min(location, getDocumentHeight() - window.innerHeight); + } + return location; + }; + + /** + * Get the height of the fixed header + * @param {Node} header The header + * @return {Number} The height of the header + */ + var getHeaderHeight = function (header) { + return !header ? 0 : (getHeight(header) + header.offsetTop); + }; + + /** + * Calculate the speed to use for the animation + * @param {Number} distance The distance to travel + * @param {Object} settings The plugin settings + * @return {Number} How fast to animate + */ + var getSpeed = function (distance, settings) { + var speed = settings.speedAsDuration ? settings.speed : Math.abs(distance / 1000 * settings.speed); + if (settings.durationMax && speed > settings.durationMax) return settings.durationMax; + if (settings.durationMin && speed < settings.durationMin) return settings.durationMin; + return parseInt(speed, 10); + }; + + var setHistory = function (options) { + + // Make sure this should run + if (!history.replaceState || !options.updateURL || history.state) return; + + // Get the hash to use + var hash = window.location.hash; + hash = hash ? hash : ''; + + // Set a default history + history.replaceState( + { + smoothScroll: JSON.stringify(options), + anchor: hash ? hash : window.pageYOffset + }, + document.title, + hash ? hash : window.location.href + ); + + }; + + /** + * Update the URL + * @param {Node} anchor The anchor that was scrolled to + * @param {Boolean} isNum If true, anchor is a number + * @param {Object} options Settings for Smooth Scroll + */ + var updateURL = function (anchor, isNum, options) { + + // Bail if the anchor is a number + if (isNum) return; + + // Verify that pushState is supported and the updateURL option is enabled + if (!history.pushState || !options.updateURL) return; + + // Update URL + history.pushState( + { + smoothScroll: JSON.stringify(options), + anchor: anchor.id + }, + document.title, + anchor === document.documentElement ? '#top' : '#' + anchor.id + ); + + }; + + /** + * Bring the anchored element into focus + * @param {Node} anchor The anchor element + * @param {Number} endLocation The end location to scroll to + * @param {Boolean} isNum If true, scroll is to a position rather than an element + */ + var adjustFocus = function (anchor, endLocation, isNum) { + + // Is scrolling to top of page, blur + if (anchor === 0) { + document.body.focus(); + } + + // Don't run if scrolling to a number on the page + if (isNum) return; + + // Otherwise, bring anchor element into focus + anchor.focus(); + if (document.activeElement !== anchor) { + anchor.setAttribute('tabindex', '-1'); + anchor.focus(); + anchor.style.outline = 'none'; + } + window.scrollTo(0 , endLocation); + + }; + + /** + * Emit a custom event + * @param {String} type The event type + * @param {Object} options The settings object + * @param {Node} anchor The anchor element + * @param {Node} toggle The toggle element + */ + var emitEvent = function (type, options, anchor, toggle) { + if (!options.emitEvents || typeof window.CustomEvent !== 'function') return; + var event = new CustomEvent(type, { + bubbles: true, + detail: { + anchor: anchor, + toggle: toggle + } + }); + document.dispatchEvent(event); + }; + + + // + // SmoothScroll Constructor + // + + var SmoothScroll = function (selector, options) { + + // + // Variables + // + + var smoothScroll = {}; // Object for public APIs + var settings, toggle, fixedHeader, animationInterval; + + + // + // Methods + // + + /** + * Cancel a scroll-in-progress + */ + smoothScroll.cancelScroll = function (noEvent) { + cancelAnimationFrame(animationInterval); + animationInterval = null; + if (noEvent) return; + emitEvent('scrollCancel', settings); + }; + + /** + * Start/stop the scrolling animation + * @param {Node|Number} anchor The element or position to scroll to + * @param {Element} toggle The element that toggled the scroll event + * @param {Object} options + */ + smoothScroll.animateScroll = function (anchor, toggle, options) { + + // Cancel any in progress scrolls + smoothScroll.cancelScroll(); + + // Local settings + var _settings = extend(settings || defaults, options || {}); // Merge user options with defaults + + // Selectors and variables + var isNum = Object.prototype.toString.call(anchor) === '[object Number]' ? true : false; + var anchorElem = isNum || !anchor.tagName ? null : anchor; + if (!isNum && !anchorElem) return; + var startLocation = window.pageYOffset; // Current location on the page + if (_settings.header && !fixedHeader) { + // Get the fixed header if not already set + fixedHeader = document.querySelector(_settings.header); + } + var headerHeight = getHeaderHeight(fixedHeader); + var endLocation = isNum ? anchor : getEndLocation(anchorElem, headerHeight, parseInt((typeof _settings.offset === 'function' ? _settings.offset(anchor, toggle) : _settings.offset), 10), _settings.clip); // Location to scroll to + var distance = endLocation - startLocation; // distance to travel + var documentHeight = getDocumentHeight(); + var timeLapsed = 0; + var speed = getSpeed(distance, _settings); + var start, percentage, position; + + /** + * Stop the scroll animation when it reaches its target (or the bottom/top of page) + * @param {Number} position Current position on the page + * @param {Number} endLocation Scroll to location + * @param {Number} animationInterval How much to scroll on this loop + */ + var stopAnimateScroll = function (position, endLocation) { + + // Get the current location + var currentLocation = window.pageYOffset; + + // Check if the end location has been reached yet (or we've hit the end of the document) + if (position == endLocation || currentLocation == endLocation || ((startLocation < endLocation && window.innerHeight + currentLocation) >= documentHeight)) { + + // Clear the animation timer + smoothScroll.cancelScroll(true); + + // Bring the anchored element into focus + adjustFocus(anchor, endLocation, isNum); + + // Emit a custom event + emitEvent('scrollStop', _settings, anchor, toggle); + + // Reset start + start = null; + animationInterval = null; + + return true; + + } + }; + + /** + * Loop scrolling animation + */ + var loopAnimateScroll = function (timestamp) { + if (!start) { start = timestamp; } + timeLapsed += timestamp - start; + percentage = speed === 0 ? 0 : (timeLapsed / speed); + percentage = (percentage > 1) ? 1 : percentage; + position = startLocation + (distance * easingPattern(_settings, percentage)); + window.scrollTo(0, Math.floor(position)); + if (!stopAnimateScroll(position, endLocation)) { + animationInterval = window.requestAnimationFrame(loopAnimateScroll); + start = timestamp; + } + }; + + /** + * Reset position to fix weird iOS bug + * @link https://github.com/cferdinandi/smooth-scroll/issues/45 + */ + if (window.pageYOffset === 0) { + window.scrollTo(0, 0); + } + + // Update the URL + updateURL(anchor, isNum, _settings); + + // If the user prefers reduced motion, jump to location + if (reduceMotion()) { + adjustFocus(anchor, Math.floor(endLocation), false); + return; + } + + // Emit a custom event + emitEvent('scrollStart', _settings, anchor, toggle); + + // Start scrolling animation + smoothScroll.cancelScroll(true); + window.requestAnimationFrame(loopAnimateScroll); + + }; + + /** + * If smooth scroll element clicked, animate scroll + */ + var clickHandler = function (event) { + + // Don't run if event was canceled but still bubbled up + // By @mgreter - https://github.com/cferdinandi/smooth-scroll/pull/462/ + if (event.defaultPrevented) return; + + // Don't run if right-click or command/control + click or shift + click + if (event.button !== 0 || event.metaKey || event.ctrlKey || event.shiftKey) return; + + // Check if event.target has closest() method + // By @totegi - https://github.com/cferdinandi/smooth-scroll/pull/401/ + if (!('closest' in event.target)) return; + + // Check if a smooth scroll link was clicked + toggle = event.target.closest(selector); + if (!toggle || toggle.tagName.toLowerCase() !== 'a' || event.target.closest(settings.ignore)) return; + + // Only run if link is an anchor and points to the current page + if (toggle.hostname !== window.location.hostname || toggle.pathname !== window.location.pathname || !/#/.test(toggle.href)) return; + + // Get an escaped version of the hash + var hash; + try { + hash = escapeCharacters(decodeURIComponent(toggle.hash)); + } catch(e) { + hash = escapeCharacters(toggle.hash); + } + + // Get the anchored element + var anchor; + if (hash === '#') { + if (!settings.topOnEmptyHash) return; + anchor = document.documentElement; + } else { + anchor = document.querySelector(hash); + } + anchor = !anchor && hash === '#top' ? document.documentElement : anchor; + + // If anchored element exists, scroll to it + if (!anchor) return; + event.preventDefault(); + setHistory(settings); + smoothScroll.animateScroll(anchor, toggle); + + }; + + /** + * Animate scroll on popstate events + */ + var popstateHandler = function () { + + // Stop if history.state doesn't exist (ex. if clicking on a broken anchor link). + // fixes `Cannot read property 'smoothScroll' of null` error getting thrown. + if (history.state === null) return; + + // Only run if state is a popstate record for this instantiation + if (!history.state.smoothScroll || history.state.smoothScroll !== JSON.stringify(settings)) return; + + // Get the anchor + var anchor = history.state.anchor; + if (typeof anchor === 'string' && anchor) { + anchor = document.querySelector(escapeCharacters(history.state.anchor)); + if (!anchor) return; + } + + // Animate scroll to anchor link + smoothScroll.animateScroll(anchor, null, {updateURL: false}); + + }; + + /** + * Destroy the current initialization. + */ + smoothScroll.destroy = function () { + + // If plugin isn't already initialized, stop + if (!settings) return; + + // Remove event listeners + document.removeEventListener('click', clickHandler, false); + window.removeEventListener('popstate', popstateHandler, false); + + // Cancel any scrolls-in-progress + smoothScroll.cancelScroll(); + + // Reset variables + settings = null; + toggle = null; + fixedHeader = null; + animationInterval = null; + + }; + + /** + * Initialize Smooth Scroll + * @param {Object} options User settings + */ + var init = function () { + + // feature test + if (!supports()) throw 'Smooth Scroll: This browser does not support the required JavaScript methods and browser APIs.'; + + // Destroy any existing initializations + smoothScroll.destroy(); + + // Selectors and variables + settings = extend(defaults, options || {}); // Merge user options with defaults + fixedHeader = settings.header ? document.querySelector(settings.header) : null; // Get the fixed header + + // When a toggle is clicked, run the click handler + document.addEventListener('click', clickHandler, false); + + // If updateURL and popState are enabled, listen for pop events + if (settings.updateURL && settings.popstate) { + window.addEventListener('popstate', popstateHandler, false); + } + + }; + + + // + // Initialize plugin + // + + init(); + + + // + // Public APIs + // + + return smoothScroll; + + }; + + return SmoothScroll; + +}))); diff --git a/dist/smooth-scroll.polyfills.min.js b/dist/smooth-scroll.polyfills.min.js new file mode 100644 index 0000000..575a67b --- /dev/null +++ b/dist/smooth-scroll.polyfills.min.js @@ -0,0 +1,10 @@ +/*! SmoothScroll v16.1.4 | (c) 2020 Chris Ferdinandi | MIT License | http://github.com/cferdinandi/smooth-scroll */ +!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e=e||self).SmoothScroll=t()}(this,(function(){"use strict";window.Element&&!Element.prototype.closest&&(Element.prototype.closest=function(e){var t,n=(this.document||this.ownerDocument).querySelectorAll(e),o=this;do{for(t=n.length;--t>=0&&n.item(t)!==o;);}while(t<0&&(o=o.parentElement));return o}),function(){if("function"==typeof window.CustomEvent)return!1;function e(e,t){t=t||{bubbles:!1,cancelable:!1,detail:void 0};var n=document.createEvent("CustomEvent");return n.initCustomEvent(e,t.bubbles,t.cancelable,t.detail),n}e.prototype=window.Event.prototype,window.CustomEvent=e}(), +/** + * requestAnimationFrame() polyfill + * By Erik Möller. Fixes from Paul Irish and Tino Zijdel. + * @link http://paulirish.com/2011/requestanimationframe-for-smart-animating/ + * @link http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating + * @license MIT + */ +function(){for(var e=0,t=["ms","moz","webkit","o"],n=0;n=1&&t<=31||127==t||0===i&&t>=48&&t<=57||1===i&&t>=48&&t<=57&&45===r?a+="\\"+t.toString(16)+" ":a+=t>=128||45===t||95===t||t>=48&&t<=57||t>=65&&t<=90||t>=97&&t<=122?n.charAt(i):"\\"+n.charAt(i)}return"#"+a},o=function(){return Math.max(document.body.scrollHeight,document.documentElement.scrollHeight,document.body.offsetHeight,document.documentElement.offsetHeight,document.body.clientHeight,document.documentElement.clientHeight)},i=function(e){return e?(t=e,parseInt(window.getComputedStyle(t).height,10)+e.offsetTop):0;var t},a=function(e,t,n){0===e&&document.body.focus(),n||(e.focus(),document.activeElement!==e&&(e.setAttribute("tabindex","-1"),e.focus(),e.style.outline="none"),window.scrollTo(0,t))},r=function(e,t,n,o){if(t.emitEvents&&"function"==typeof window.CustomEvent){var i=new CustomEvent(e,{bubbles:!0,detail:{anchor:n,toggle:o}});document.dispatchEvent(i)}};return function(c,u){var s,l,d,m,f={};f.cancelScroll=function(e){cancelAnimationFrame(m),m=null,e||r("scrollCancel",s)},f.animateScroll=function(n,c,u){f.cancelScroll();var l=t(s||e,u||{}),w="[object Number]"===Object.prototype.toString.call(n),h=w||!n.tagName?null:n;if(w||h){var p=window.pageYOffset;l.header&&!d&&(d=document.querySelector(l.header));var g,y,v,S=i(d),E=w?n:function(e,t,n,i){var a=0;if(e.offsetParent)do{a+=e.offsetTop,e=e.offsetParent}while(e);return a=Math.max(a-t-n,0),i&&(a=Math.min(a,o()-window.innerHeight)),a}(h,S,parseInt("function"==typeof l.offset?l.offset(n,c):l.offset,10),l.clip),b=E-p,A=o(),O=0,C=function(e,t){var n=t.speedAsDuration?t.speed:Math.abs(e/1e3*t.speed);return t.durationMax&&n>t.durationMax?t.durationMax:t.durationMin&&n1?1:y),window.scrollTo(0,Math.floor(v)),function(e,t){var o=window.pageYOffset;if(e==t||o==t||(p=A)return f.cancelScroll(!0),a(n,t,w),r("scrollStop",l,n,c),g=null,m=null,!0}(v,E)||(m=window.requestAnimationFrame(M),g=e)};0===window.pageYOffset&&window.scrollTo(0,0),function(e,t,n){t||history.pushState&&n.updateURL&&history.pushState({smoothScroll:JSON.stringify(n),anchor:e.id},document.title,e===document.documentElement?"#top":"#"+e.id)}(n,w,l),"matchMedia"in window&&window.matchMedia("(prefers-reduced-motion)").matches?a(n,Math.floor(E),!1):(r("scrollStart",l,n,c),f.cancelScroll(!0),window.requestAnimationFrame(M))}};var w=function(e){if(!e.defaultPrevented&&!(0!==e.button||e.metaKey||e.ctrlKey||e.shiftKey)&&"closest"in e.target&&(l=e.target.closest(c))&&"a"===l.tagName.toLowerCase()&&!e.target.closest(s.ignore)&&l.hostname===window.location.hostname&&l.pathname===window.location.pathname&&/#/.test(l.href)){var t,o;try{t=n(decodeURIComponent(l.hash))}catch(e){t=n(l.hash)}if("#"===t){if(!s.topOnEmptyHash)return;o=document.documentElement}else o=document.querySelector(t);(o=o||"#top"!==t?o:document.documentElement)&&(e.preventDefault(),function(e){if(history.replaceState&&e.updateURL&&!history.state){var t=window.location.hash;t=t||"",history.replaceState({smoothScroll:JSON.stringify(e),anchor:t||window.pageYOffset},document.title,t||window.location.href)}}(s),f.animateScroll(o,l))}},h=function(){if(null!==history.state&&history.state.smoothScroll&&history.state.smoothScroll===JSON.stringify(s)){var e=history.state.anchor;"string"==typeof e&&e&&!(e=document.querySelector(n(history.state.anchor)))||f.animateScroll(e,null,{updateURL:!1})}};f.destroy=function(){s&&(document.removeEventListener("click",w,!1),window.removeEventListener("popstate",h,!1),f.cancelScroll(),s=null,l=null,d=null,m=null)};return function(){if(!("querySelector"in document&&"addEventListener"in window&&"requestAnimationFrame"in window&&"closest"in window.Element.prototype))throw"Smooth Scroll: This browser does not support the required JavaScript methods and browser APIs.";f.destroy(),s=t(e,u||{}),d=s.header?document.querySelector(s.header):null,document.addEventListener("click",w,!1),s.updateURL&&s.popstate&&window.addEventListener("popstate",h,!1)}(),f}})); diff --git a/gulpfile.js b/gulpfile.js new file mode 100755 index 0000000..0b20e1e --- /dev/null +++ b/gulpfile.js @@ -0,0 +1,315 @@ +/** + * Settings + * Turn on/off build features + */ + +var settings = { + clean: true, + scripts: true, + polyfills: true, + styles: false, + svgs: false, + copy: true, + reload: true +}; + + +/** + * Paths to project folders + */ + +var paths = { + input: 'src/', + output: 'dist/', + scripts: { + input: 'src/js/*', + polyfills: '.polyfill.js', + output: 'dist/' + }, + styles: { + input: 'src/sass/**/*.{scss,sass}', + output: 'dist/css/' + }, + svgs: { + input: 'src/svg/*.svg', + output: 'dist/svg/' + }, + copy: { + input: 'src/copy/*', + output: './' + }, + reload: './' +}; + + +/** + * Template for banner to add to file headers + */ + +var banner = { + full: + '/*!\n' + + ' * <%= package.name %> v<%= package.version %>\n' + + ' * <%= package.description %>\n' + + ' * (c) ' + new Date().getFullYear() + ' <%= package.author.name %>\n' + + ' * <%= package.license %> License\n' + + ' * <%= package.repository.url %>\n' + + ' */\n\n', + min: + '/*!' + + ' <%= package.name %> v<%= package.version %>' + + ' | (c) ' + new Date().getFullYear() + ' <%= package.author.name %>' + + ' | <%= package.license %> License' + + ' | <%= package.repository.url %>' + + ' */\n' +}; + + +/** + * Gulp Packages + */ + +// General +var {gulp, src, dest, watch, series, parallel} = require('gulp'); +var del = require('del'); +var flatmap = require('gulp-flatmap'); +var lazypipe = require('lazypipe'); +var rename = require('gulp-rename'); +var header = require('gulp-header'); +var package = require('./package.json'); + +// Scripts +var jshint = require('gulp-jshint'); +var stylish = require('jshint-stylish'); +var concat = require('gulp-concat'); +var uglify = require('gulp-uglify'); +var optimizejs = require('gulp-optimize-js'); + +// Styles +var sass = require('gulp-sass'); +var prefix = require('gulp-autoprefixer'); +var minify = require('gulp-cssnano'); + +// SVGs +var svgmin = require('gulp-svgmin'); + +// BrowserSync +var browserSync = require('browser-sync'); + + +/** + * Gulp Tasks + */ + +// Remove pre-existing content from output folders +var cleanDist = function (done) { + + // Make sure this feature is activated before running + if (!settings.clean) return done(); + + // Clean the dist folder + del.sync([ + paths.output + ]); + + // Signal completion + return done(); + +}; + +// Repeated JavaScript tasks +var jsTasks = lazypipe() + .pipe(header, banner.full, {package: package}) + .pipe(optimizejs) + .pipe(dest, paths.scripts.output) + .pipe(rename, {suffix: '.min'}) + .pipe(uglify) + .pipe(optimizejs) + .pipe(header, banner.min, {package: package}) + .pipe(dest, paths.scripts.output); + +// Lint, minify, and concatenate scripts +var buildScripts = function (done) { + + // Make sure this feature is activated before running + if (!settings.scripts) return done(); + + // Run tasks on script files + src(paths.scripts.input) + .pipe(flatmap(function(stream, file) { + + // If the file is a directory + if (file.isDirectory()) { + + // Setup a suffix variable + var suffix = ''; + + // If separate polyfill files enabled + if (settings.polyfills) { + + // Update the suffix + suffix = '.polyfills'; + + // Grab files that aren't polyfills, concatenate them, and process them + src([file.path + '/*.js', '!' + file.path + '/*' + paths.scripts.polyfills]) + .pipe(concat(file.relative + '.js')) + .pipe(jsTasks()); + + } + + // Grab all files and concatenate them + // If separate polyfills enabled, this will have .polyfills in the filename + src(file.path + '/*.js') + .pipe(concat(file.relative + suffix + '.js')) + .pipe(jsTasks()); + + return stream; + + } + + // Otherwise, process the file + return stream.pipe(jsTasks()); + + })); + + // Signal completion + done(); + +}; + +// Lint scripts +var lintScripts = function (done) { + + // Make sure this feature is activated before running + if (!settings.scripts) return done(); + + // Lint scripts + src(paths.scripts.input) + .pipe(jshint()) + .pipe(jshint.reporter('jshint-stylish')); + + // Signal completion + done(); + +}; + +// Process, lint, and minify Sass files +var buildStyles = function (done) { + + // Make sure this feature is activated before running + if (!settings.styles) return done(); + + // Run tasks on all Sass files + src(paths.styles.input) + .pipe(sass({ + outputStyle: 'expanded', + sourceComments: true + })) + .pipe(prefix({ + browsers: ['last 2 version', '> 0.25%'], + cascade: true, + remove: true + })) + .pipe(header(banner.full, { package : package })) + .pipe(dest(paths.styles.output)) + .pipe(rename({suffix: '.min'})) + .pipe(minify({ + discardComments: { + removeAll: true + } + })) + .pipe(header(banner.min, { package : package })) + .pipe(dest(paths.styles.output)); + + // Signal completion + done(); + +}; + +// Optimize SVG files +var buildSVGs = function (done) { + + // Make sure this feature is activated before running + if (!settings.svgs) return done(); + + // Optimize SVG files + src(paths.svgs.input) + .pipe(svgmin()) + .pipe(dest(paths.svgs.output)); + + // Signal completion + done(); + +}; + +// Copy static files into output folder +var copyFiles = function (done) { + + // Make sure this feature is activated before running + if (!settings.copy) return done(); + + // Copy static files + src(paths.copy.input) + .pipe(dest(paths.copy.output)); + + // Signal completion + done(); + +}; + +// Watch for changes to the src directory +var startServer = function (done) { + + // Make sure this feature is activated before running + if (!settings.reload) return done(); + + // Initialize BrowserSync + browserSync.init({ + server: { + baseDir: paths.reload + } + }); + + // Signal completion + done(); + +}; + +// Reload the browser when files change +var reloadBrowser = function (done) { + if (!settings.reload) return done(); + browserSync.reload(); + done(); +}; + +// Watch for changes +var watchSource = function (done) { + watch(paths.input, series(exports.default, reloadBrowser)); + done(); +}; + + +/** + * Export Tasks + */ + +// Default task +// gulp +exports.default = series( + cleanDist, + parallel( + buildScripts, + lintScripts, + buildStyles, + buildSVGs, + copyFiles + ) +); + +// Watch and reload +// gulp watch +exports.watch = series( + exports.default, + startServer, + watchSource +); \ No newline at end of file diff --git a/index.html b/index.html old mode 100644 new mode 100755 index b9dbea2..a10fdc9 --- a/index.html +++ b/index.html @@ -1,81 +1,149 @@ - - - Smooth Scroll - A simple vanilla JS script to animate scrolling to anchor links. - - - - - - - -
- -

Smooth Scroll

-

A lightweight script to animate scrolling to anchor links.

- -

- Linear
- Linear (no other options)
-

- -

- Ease-In
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- - - - - - - + + + + Smooth Scroll + + + + + + + + +
+ + + +
+

+ Linear
+ Linear (no other options)
+

+ +

+ Ease-In
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+ +

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+ + + + + + + \ No newline at end of file diff --git a/jump-to-top.html b/jump-to-top.html new file mode 100644 index 0000000..393e4ad --- /dev/null +++ b/jump-to-top.html @@ -0,0 +1,60 @@ + + + + + + Smooth Scroll + + + + + + + + +
+ + + +
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+ + + + + + + + \ No newline at end of file diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..db08368 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,3968 @@ +{ + "name": "smooth-scroll", + "version": "16.1.4", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "@babel/code-frame": { + "version": "7.8.3", + "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz", + "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==", + "dev": true, + "requires": { + "@babel/highlight": "^7.8.3" + } + }, + "@babel/helper-validator-identifier": { + "version": "7.9.5", + "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.9.5.tgz", + "integrity": "sha512-/8arLKUFq882w4tWGj9JYzRpAlZgiWUJ+dtteNTDqrRBz9Iguck9Rn3ykuBDoUwh2TO4tSAJlrxDUOXWklJe4g==", + "dev": true + }, + "@babel/highlight": { + "version": 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{ + "type": "git", + "url": "http://github.com/cferdinandi/smooth-scroll" + }, + "scripts": { + "js": "rollup --config", + "build": "npm run js" + }, + "devDependencies": { + "rollup": "^2.6.1", + "rollup-plugin-terser": "^5.3.0", + "sass": "^1.26.5", + "imagemin-cli": "^5.1.0", + "imagemin-mozjpeg": "^8.0.0", + "imagemin-pngcrush": "^6.0.0", + "imagemin-pngquant": "^8.0.0", + "imagemin-zopfli": "^6.0.0", + "svgo": "^1.3.2" + } +} diff --git a/rollup.config.js b/rollup.config.js new file mode 100644 index 0000000..086774b --- /dev/null +++ b/rollup.config.js @@ -0,0 +1,72 @@ +// Plugins +import { terser } from 'rollup-plugin-terser'; +import pkg from './package.json'; + + +// Configs +var configs = { + name: 'SmoothScroll', + files: ['smooth-scroll.js', 'smooth-scroll.polyfills.js'], + formats: ['umd'], + default: 'umd', + pathIn: 'src/', + pathOut: 'dist/', + minify: true +}; + +// Banner +var banner = `/*! ${configs.name ? configs.name : pkg.name} v${pkg.version} | (c) ${new Date().getFullYear()} ${pkg.author.name} | ${pkg.license} License | ${pkg.repository.url} */`; + +var createOutput = function (filename, minify) { + return configs.formats.map(function (format) { + var output = { + file: `${configs.pathOut}/${filename}${format === configs.default ? '' : `.${format}`}${minify ? '.min' : ''}.js`, + format: format, + banner: banner + }; + if (format === 'iife' || format === 'umd') { + output.name = configs.name ? configs.name : pkg.name; + } + if (minify) { + output.plugins = [terser()]; + } + return output; + }); +}; + +/** + * Create output formats + * @param {String} filename The filename + * @return {Array} The outputs array + */ +var createOutputs = function (filename) { + + // Create base outputs + var outputs = createOutput(filename); + + // If not minifying, return outputs + if (!configs.minify) return outputs; + + // Otherwise, ceate second set of outputs + var outputsMin = createOutput(filename, true); + + // Merge and return the two arrays + return outputs.concat(outputsMin); + +}; + +/** + * Create export object + * @return {Array} The export object + */ +var createExport = function (file) { + return configs.files.map(function (file) { + var filename = file.replace('.js', ''); + return { + input: `${configs.pathIn}/${file}`, + output: createOutputs(filename) + }; + }); +}; + +export default createExport(); \ No newline at end of file diff --git a/smooth-scroll.js b/smooth-scroll.js deleted file mode 100755 index 4aace38..0000000 --- a/smooth-scroll.js +++ /dev/null @@ -1,210 +0,0 @@ -/* ============================================================= - - Smooth Scroll v4.4 - Animate scrolling to anchor links, by Chris Ferdinandi. - http://gomakethings.com - - Additional contributors: - https://github.com/cferdinandi/smooth-scroll#contributors - - Free to use under the MIT License. - http://gomakethings.com/mit/ - - * ============================================================= */ - -window.smoothScroll = (function (window, document, undefined) { - - 'use strict'; - - // Default settings - // Private {object} variable - var _defaults = { - speed: 500, - easing: 'easeInOutCubic', - updateURL: false, - callbackBefore: function () {}, - callbackAfter: function () {} - }; - - // Merge default settings with user options - // Private method - // Returns an {object} - var _mergeObjects = function ( original, updates ) { - for (var key in updates) { - original[key] = updates[key]; - } - return original; - }; - - // Calculate the easing pattern - // Private method - // Returns a decimal number - var _easingPattern = function ( type, time ) { - if ( type == 'easeInQuad' ) return time * time; // accelerating from zero velocity - if ( type == 'easeOutQuad' ) return time * (2 - time); // decelerating to zero velocity - if ( type == 'easeInOutQuad' ) return time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; // acceleration until halfway, then deceleration - if ( type == 'easeInCubic' ) return time * time * time; // accelerating from zero velocity - if ( type == 'easeOutCubic' ) return (--time) * time * time + 1; // decelerating to zero velocity - if ( type == 'easeInOutCubic' ) return time < 0.5 ? 4 * time * time * time : (time - 1) * (2 * time - 2) * (2 * time - 2) + 1; // acceleration until halfway, then deceleration - if ( type == 'easeInQuart' ) return time * time * time * time; // accelerating from zero velocity - if ( type == 'easeOutQuart' ) return 1 - (--time) * time * time * time; // decelerating to zero velocity - if ( type == 'easeInOutQuart' ) return time < 0.5 ? 8 * time * time * time * time : 1 - 8 * (--time) * time * time * time; // acceleration until halfway, then deceleration - if ( type == 'easeInQuint' ) return time * time * time * time * time; // accelerating from zero velocity - if ( type == 'easeOutQuint' ) return 1 + (--time) * time * time * time * time; // decelerating to zero velocity - if ( type == 'easeInOutQuint' ) return time < 0.5 ? 16 * time * time * time * time * time : 1 + 16 * (--time) * time * time * time * time; // acceleration until halfway, then deceleration - return time; // no easing, no acceleration - }; - - // Calculate how far to scroll - // Private method - // Returns an integer - var _getEndLocation = function ( anchor, headerHeight ) { - var location = 0; - if (anchor.offsetParent) { - do { - location += anchor.offsetTop; - anchor = anchor.offsetParent; - } while (anchor); - } - location = location - headerHeight; - if ( location >= 0 ) { - return location; - } else { - return 0; - } - }; - - // Convert data-options attribute into an object of key/value pairs - // Private method - // Returns an {object} - var _getDataOptions = function ( options ) { - - if ( options === null || options === undefined ) { - return {}; - } else { - var settings = {}; // Create settings object - options = options.split(';'); // Split into array of options - - // Create a key/value pair for each setting - options.forEach( function(option) { - option = option.trim(); - if ( option !== '' ) { - option = option.split(':'); - settings[option[0]] = option[1].trim(); - } - }); - - return settings; - } - - }; - - // Update the URL - // Private method - // Runs functions - var _updateURL = function ( anchor, url ) { - if ( (url === true || url === 'true') && history.pushState ) { - history.pushState( {pos:anchor.id}, '', anchor ); - } - }; - - // Start/stop the scrolling animation - // Public method - // Runs functions - var animateScroll = function ( toggle, anchor, options, event ) { - - // Options and overrides - options = _mergeObjects( _defaults, options || {} ); // Merge user options with defaults - var overrides = _getDataOptions( toggle ? toggle.getAttribute('data-options') : null ); - var speed = overrides.speed || options.speed; - var easing = overrides.easing || options.easing; - var updateURL = overrides.updateURL || options.updateURL; - - // Selectors and variables - var fixedHeader = document.querySelector('[data-scroll-header]'); // Get the fixed header - var headerHeight = fixedHeader === null ? 0 : (fixedHeader.offsetHeight + fixedHeader.offsetTop); // Get the height of a fixed header if one exists - var startLocation = window.pageYOffset; // Current location on the page - var endLocation = _getEndLocation( document.querySelector(anchor), headerHeight ); // Scroll to location - var animationInterval; // interval timer - var distance = endLocation - startLocation; // distance to travel - var timeLapsed = 0; - var percentage, position; - - // Prevent default click event - if ( toggle && toggle.tagName === 'A' && event ) { - event.preventDefault(); - } - - // Update URL - _updateURL(anchor, updateURL); - - // Stop the scroll animation when it reaches its target (or the bottom/top of page) - // Private method - // Runs functions - var _stopAnimateScroll = function (position, endLocation, animationInterval) { - var currentLocation = window.pageYOffset; - if ( position == endLocation || currentLocation == endLocation || ( (window.innerHeight + currentLocation) >= document.body.scrollHeight ) ) { - clearInterval(animationInterval); - options.callbackAfter( toggle, anchor ); // Run callbacks after animation complete - } - }; - - // Loop scrolling animation - // Private method - // Runs functions - var _loopAnimateScroll = function () { - timeLapsed += 16; - percentage = ( timeLapsed / speed ); - percentage = ( percentage > 1 ) ? 1 : percentage; - position = startLocation + ( distance * _easingPattern(easing, percentage) ); - window.scrollTo( 0, Math.floor(position) ); - _stopAnimateScroll(position, endLocation, animationInterval); - }; - - // Set interval timer - // Private method - // Runs functions - var _startAnimateScroll = function () { - options.callbackBefore( toggle, anchor ); // Run callbacks before animating scroll - animationInterval = setInterval(_loopAnimateScroll, 16); - }; - - // Reset position to fix weird iOS bug - // https://github.com/cferdinandi/smooth-scroll/issues/45 - if ( window.pageYOffset === 0 ) { - window.scrollTo( 0, 0 ); - } - - // Start scrolling animation - _startAnimateScroll(); - - }; - - // Initialize Smooth Scroll - // Public method - // Runs functions - var init = function ( options ) { - - // Feature test before initializing - if ( 'querySelector' in document && 'addEventListener' in window && Array.prototype.forEach ) { - - // Selectors and variables - options = _mergeObjects( _defaults, options || {} ); // Merge user options with defaults - var toggles = document.querySelectorAll('[data-scroll]'); // Get smooth scroll toggles - - // When a toggle is clicked, run the click handler - Array.prototype.forEach.call(toggles, function (toggle, index) { - toggle.addEventListener('click', animateScroll.bind( null, toggle, toggle.getAttribute('href'), options ), false); - }); - - } - - }; - - // Return public methods - return { - init: init, - animateScroll: animateScroll - }; - -})(window, document); \ No newline at end of file diff --git a/speed.html b/speed.html new file mode 100644 index 0000000..21c834a --- /dev/null +++ b/speed.html @@ -0,0 +1,69 @@ + + + + + + Smooth Scroll + + + + + + + + +
+ + + +
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+ Click Me
+ Or me +

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+ + + + + + + + \ No newline at end of file diff --git a/src/_closest.polyfill.js b/src/_closest.polyfill.js new file mode 100644 index 0000000..068e47a --- /dev/null +++ b/src/_closest.polyfill.js @@ -0,0 +1,16 @@ +/** + * closest() polyfill + * @link https://developer.mozilla.org/en-US/docs/Web/API/Element/closest#Polyfill + */ +if (window.Element && !Element.prototype.closest) { + Element.prototype.closest = function(s) { + var matches = (this.document || this.ownerDocument).querySelectorAll(s), + i, + el = this; + do { + i = matches.length; + while (--i >= 0 && matches.item(i) !== el) {} + } while ((i < 0) && (el = el.parentElement)); + return el; + }; +} diff --git a/src/_customEvent.polyfill.js b/src/_customEvent.polyfill.js new file mode 100644 index 0000000..4e7a110 --- /dev/null +++ b/src/_customEvent.polyfill.js @@ -0,0 +1,19 @@ +/** + * CustomEvent() polyfill + * https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/CustomEvent#Polyfill + */ +(function () { + + if (typeof window.CustomEvent === "function") return false; + + function CustomEvent(event, params) { + params = params || { bubbles: false, cancelable: false, detail: undefined }; + var evt = document.createEvent('CustomEvent'); + evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail); + return evt; + } + + CustomEvent.prototype = window.Event.prototype; + + window.CustomEvent = CustomEvent; +})(); \ No newline at end of file diff --git a/src/_requestAnimationFrame.polyfill.js b/src/_requestAnimationFrame.polyfill.js new file mode 100644 index 0000000..9b1bfee --- /dev/null +++ b/src/_requestAnimationFrame.polyfill.js @@ -0,0 +1,33 @@ +/** + * requestAnimationFrame() polyfill + * By Erik Möller. Fixes from Paul Irish and Tino Zijdel. + * @link http://paulirish.com/2011/requestanimationframe-for-smart-animating/ + * @link http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating + * @license MIT + */ +(function() { + var lastTime = 0; + var vendors = ['ms', 'moz', 'webkit', 'o']; + for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) { + window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame']; + window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || + window[vendors[x]+'CancelRequestAnimationFrame']; + } + + if (!window.requestAnimationFrame) { + window.requestAnimationFrame = function(callback, element) { + var currTime = new Date().getTime(); + var timeToCall = Math.max(0, 16 - (currTime - lastTime)); + var id = window.setTimeout(function() { callback(currTime + timeToCall); }, + timeToCall); + lastTime = currTime + timeToCall; + return id; + }; + } + + if (!window.cancelAnimationFrame) { + window.cancelAnimationFrame = function(id) { + clearTimeout(id); + }; + } +}()); diff --git a/src/core.js b/src/core.js new file mode 100755 index 0000000..25abec6 --- /dev/null +++ b/src/core.js @@ -0,0 +1,622 @@ +// +// Default settings +// + +var defaults = { + + // Selectors + ignore: '[data-scroll-ignore]', + header: null, + topOnEmptyHash: true, + + // Speed & Duration + speed: 500, + speedAsDuration: false, + durationMax: null, + durationMin: null, + clip: true, + offset: 0, + + // Easing + easing: 'easeInOutCubic', + customEasing: null, + + // History + updateURL: true, + popstate: true, + + // Custom Events + emitEvents: true + +}; + + +// +// Utility Methods +// + +/** + * Check if browser supports required methods + * @return {Boolean} Returns true if all required methods are supported + */ +var supports = function () { + return ( + 'querySelector' in document && + 'addEventListener' in window && + 'requestAnimationFrame' in window && + 'closest' in window.Element.prototype + ); +}; + +/** + * Merge two or more objects together. + * @param {Object} objects The objects to merge together + * @returns {Object} Merged values of defaults and options + */ +var extend = function () { + var merged = {}; + Array.prototype.forEach.call(arguments, function (obj) { + for (var key in obj) { + if (!obj.hasOwnProperty(key)) return; + merged[key] = obj[key]; + } + }); + return merged; +}; + +/** + * Check to see if user prefers reduced motion + * @param {Object} settings Script settings + */ +var reduceMotion = function () { + if ('matchMedia' in window && window.matchMedia('(prefers-reduced-motion)').matches) { + return true; + } + return false; +}; + +/** + * Get the height of an element. + * @param {Node} elem The element to get the height of + * @return {Number} The element's height in pixels + */ +var getHeight = function (elem) { + return parseInt(window.getComputedStyle(elem).height, 10); +}; + +/** + * Escape special characters for use with querySelector + * @author Mathias Bynens + * @link https://github.com/mathiasbynens/CSS.escape + * @param {String} id The anchor ID to escape + */ +var escapeCharacters = function (id) { + + // Remove leading hash + if (id.charAt(0) === '#') { + id = id.substr(1); + } + + var string = String(id); + var length = string.length; + var index = -1; + var codeUnit; + var result = ''; + var firstCodeUnit = string.charCodeAt(0); + while (++index < length) { + codeUnit = string.charCodeAt(index); + // Note: there’s no need to special-case astral symbols, surrogate + // pairs, or lone surrogates. + + // If the character is NULL (U+0000), then throw an + // `InvalidCharacterError` exception and terminate these steps. + if (codeUnit === 0x0000) { + throw new InvalidCharacterError( + 'Invalid character: the input contains U+0000.' + ); + } + + if ( + // If the character is in the range [\1-\1F] (U+0001 to U+001F) or is + // U+007F, […] + (codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F || + // If the character is the first character and is in the range [0-9] + // (U+0030 to U+0039), […] + (index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) || + // If the character is the second character and is in the range [0-9] + // (U+0030 to U+0039) and the first character is a `-` (U+002D), […] + ( + index === 1 && + codeUnit >= 0x0030 && codeUnit <= 0x0039 && + firstCodeUnit === 0x002D + ) + ) { + // http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point + result += '\\' + codeUnit.toString(16) + ' '; + continue; + } + + // If the character is not handled by one of the above rules and is + // greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or + // is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to + // U+005A), or [a-z] (U+0061 to U+007A), […] + if ( + codeUnit >= 0x0080 || + codeUnit === 0x002D || + codeUnit === 0x005F || + codeUnit >= 0x0030 && codeUnit <= 0x0039 || + codeUnit >= 0x0041 && codeUnit <= 0x005A || + codeUnit >= 0x0061 && codeUnit <= 0x007A + ) { + // the character itself + result += string.charAt(index); + continue; + } + + // Otherwise, the escaped character. + // http://dev.w3.org/csswg/cssom/#escape-a-character + result += '\\' + string.charAt(index); + + } + + // Return sanitized hash + return '#' + result; + +}; + +/** + * Calculate the easing pattern + * @link https://gist.github.com/gre/1650294 + * @param {Object} settings Easing pattern + * @param {Number} time Time animation should take to complete + * @returns {Number} + */ +var easingPattern = function (settings, time) { + var pattern; + + // Default Easing Patterns + if (settings.easing === 'easeInQuad') pattern = time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuad') pattern = time * (2 - time); // decelerating to zero velocity + if (settings.easing === 'easeInOutQuad') pattern = time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInCubic') pattern = time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutCubic') pattern = (--time) * time * time + 1; // decelerating to zero velocity + if (settings.easing === 'easeInOutCubic') pattern = time < 0.5 ? 4 * time * time * time : (time - 1) * (2 * time - 2) * (2 * time - 2) + 1; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInQuart') pattern = time * time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuart') pattern = 1 - (--time) * time * time * time; // decelerating to zero velocity + if (settings.easing === 'easeInOutQuart') pattern = time < 0.5 ? 8 * time * time * time * time : 1 - 8 * (--time) * time * time * time; // acceleration until halfway, then deceleration + if (settings.easing === 'easeInQuint') pattern = time * time * time * time * time; // accelerating from zero velocity + if (settings.easing === 'easeOutQuint') pattern = 1 + (--time) * time * time * time * time; // decelerating to zero velocity + if (settings.easing === 'easeInOutQuint') pattern = time < 0.5 ? 16 * time * time * time * time * time : 1 + 16 * (--time) * time * time * time * time; // acceleration until halfway, then deceleration + + // Custom Easing Patterns + if (!!settings.customEasing) pattern = settings.customEasing(time); + + return pattern || time; // no easing, no acceleration +}; + +/** + * Determine the document's height + * @returns {Number} + */ +var getDocumentHeight = function () { + return Math.max( + document.body.scrollHeight, document.documentElement.scrollHeight, + document.body.offsetHeight, document.documentElement.offsetHeight, + document.body.clientHeight, document.documentElement.clientHeight + ); +}; + +/** + * Calculate how far to scroll + * Clip support added by robjtede - https://github.com/cferdinandi/smooth-scroll/issues/405 + * @param {Element} anchor The anchor element to scroll to + * @param {Number} headerHeight Height of a fixed header, if any + * @param {Number} offset Number of pixels by which to offset scroll + * @param {Boolean} clip If true, adjust scroll distance to prevent abrupt stops near the bottom of the page + * @returns {Number} + */ +var getEndLocation = function (anchor, headerHeight, offset, clip) { + var location = 0; + if (anchor.offsetParent) { + do { + location += anchor.offsetTop; + anchor = anchor.offsetParent; + } while (anchor); + } + location = Math.max(location - headerHeight - offset, 0); + if (clip) { + location = Math.min(location, getDocumentHeight() - window.innerHeight); + } + return location; +}; + +/** + * Get the height of the fixed header + * @param {Node} header The header + * @return {Number} The height of the header + */ +var getHeaderHeight = function (header) { + return !header ? 0 : (getHeight(header) + header.offsetTop); +}; + +/** + * Calculate the speed to use for the animation + * @param {Number} distance The distance to travel + * @param {Object} settings The plugin settings + * @return {Number} How fast to animate + */ +var getSpeed = function (distance, settings) { + var speed = settings.speedAsDuration ? settings.speed : Math.abs(distance / 1000 * settings.speed); + if (settings.durationMax && speed > settings.durationMax) return settings.durationMax; + if (settings.durationMin && speed < settings.durationMin) return settings.durationMin; + return parseInt(speed, 10); +}; + +var setHistory = function (options) { + + // Make sure this should run + if (!history.replaceState || !options.updateURL || history.state) return; + + // Get the hash to use + var hash = window.location.hash; + hash = hash ? hash : ''; + + // Set a default history + history.replaceState( + { + smoothScroll: JSON.stringify(options), + anchor: hash ? hash : window.pageYOffset + }, + document.title, + hash ? hash : window.location.href + ); + +}; + +/** + * Update the URL + * @param {Node} anchor The anchor that was scrolled to + * @param {Boolean} isNum If true, anchor is a number + * @param {Object} options Settings for Smooth Scroll + */ +var updateURL = function (anchor, isNum, options) { + + // Bail if the anchor is a number + if (isNum) return; + + // Verify that pushState is supported and the updateURL option is enabled + if (!history.pushState || !options.updateURL) return; + + // Update URL + history.pushState( + { + smoothScroll: JSON.stringify(options), + anchor: anchor.id + }, + document.title, + anchor === document.documentElement ? '#top' : '#' + anchor.id + ); + +}; + +/** + * Bring the anchored element into focus + * @param {Node} anchor The anchor element + * @param {Number} endLocation The end location to scroll to + * @param {Boolean} isNum If true, scroll is to a position rather than an element + */ +var adjustFocus = function (anchor, endLocation, isNum) { + + // Is scrolling to top of page, blur + if (anchor === 0) { + document.body.focus(); + } + + // Don't run if scrolling to a number on the page + if (isNum) return; + + // Otherwise, bring anchor element into focus + anchor.focus(); + if (document.activeElement !== anchor) { + anchor.setAttribute('tabindex', '-1'); + anchor.focus(); + anchor.style.outline = 'none'; + } + window.scrollTo(0 , endLocation); + +}; + +/** + * Emit a custom event + * @param {String} type The event type + * @param {Object} options The settings object + * @param {Node} anchor The anchor element + * @param {Node} toggle The toggle element + */ +var emitEvent = function (type, options, anchor, toggle) { + if (!options.emitEvents || typeof window.CustomEvent !== 'function') return; + var event = new CustomEvent(type, { + bubbles: true, + detail: { + anchor: anchor, + toggle: toggle + } + }); + document.dispatchEvent(event); +}; + + +// +// SmoothScroll Constructor +// + +var SmoothScroll = function (selector, options) { + + // + // Variables + // + + var smoothScroll = {}; // Object for public APIs + var settings, anchor, toggle, fixedHeader, eventTimeout, animationInterval; + + + // + // Methods + // + + /** + * Cancel a scroll-in-progress + */ + smoothScroll.cancelScroll = function (noEvent) { + cancelAnimationFrame(animationInterval); + animationInterval = null; + if (noEvent) return; + emitEvent('scrollCancel', settings); + }; + + /** + * Start/stop the scrolling animation + * @param {Node|Number} anchor The element or position to scroll to + * @param {Element} toggle The element that toggled the scroll event + * @param {Object} options + */ + smoothScroll.animateScroll = function (anchor, toggle, options) { + + // Cancel any in progress scrolls + smoothScroll.cancelScroll(); + + // Local settings + var _settings = extend(settings || defaults, options || {}); // Merge user options with defaults + + // Selectors and variables + var isNum = Object.prototype.toString.call(anchor) === '[object Number]' ? true : false; + var anchorElem = isNum || !anchor.tagName ? null : anchor; + if (!isNum && !anchorElem) return; + var startLocation = window.pageYOffset; // Current location on the page + if (_settings.header && !fixedHeader) { + // Get the fixed header if not already set + fixedHeader = document.querySelector(_settings.header); + } + var headerHeight = getHeaderHeight(fixedHeader); + var endLocation = isNum ? anchor : getEndLocation(anchorElem, headerHeight, parseInt((typeof _settings.offset === 'function' ? _settings.offset(anchor, toggle) : _settings.offset), 10), _settings.clip); // Location to scroll to + var distance = endLocation - startLocation; // distance to travel + var documentHeight = getDocumentHeight(); + var timeLapsed = 0; + var speed = getSpeed(distance, _settings); + var start, percentage, position; + + /** + * Stop the scroll animation when it reaches its target (or the bottom/top of page) + * @param {Number} position Current position on the page + * @param {Number} endLocation Scroll to location + * @param {Number} animationInterval How much to scroll on this loop + */ + var stopAnimateScroll = function (position, endLocation) { + + // Get the current location + var currentLocation = window.pageYOffset; + + // Check if the end location has been reached yet (or we've hit the end of the document) + if (position == endLocation || currentLocation == endLocation || ((startLocation < endLocation && window.innerHeight + currentLocation) >= documentHeight)) { + + // Clear the animation timer + smoothScroll.cancelScroll(true); + + // Bring the anchored element into focus + adjustFocus(anchor, endLocation, isNum); + + // Emit a custom event + emitEvent('scrollStop', _settings, anchor, toggle); + + // Reset start + start = null; + animationInterval = null; + + return true; + + } + }; + + /** + * Loop scrolling animation + */ + var loopAnimateScroll = function (timestamp) { + if (!start) { start = timestamp; } + timeLapsed += timestamp - start; + percentage = speed === 0 ? 0 : (timeLapsed / speed); + percentage = (percentage > 1) ? 1 : percentage; + position = startLocation + (distance * easingPattern(_settings, percentage)); + window.scrollTo(0, Math.floor(position)); + if (!stopAnimateScroll(position, endLocation)) { + animationInterval = window.requestAnimationFrame(loopAnimateScroll); + start = timestamp; + } + }; + + /** + * Reset position to fix weird iOS bug + * @link https://github.com/cferdinandi/smooth-scroll/issues/45 + */ + if (window.pageYOffset === 0) { + window.scrollTo(0, 0); + } + + // Update the URL + updateURL(anchor, isNum, _settings); + + // If the user prefers reduced motion, jump to location + if (reduceMotion()) { + adjustFocus(anchor, Math.floor(endLocation), false); + return; + } + + // Emit a custom event + emitEvent('scrollStart', _settings, anchor, toggle); + + // Start scrolling animation + smoothScroll.cancelScroll(true); + window.requestAnimationFrame(loopAnimateScroll); + + }; + + /** + * If smooth scroll element clicked, animate scroll + */ + var clickHandler = function (event) { + + // Don't run if event was canceled but still bubbled up + // By @mgreter - https://github.com/cferdinandi/smooth-scroll/pull/462/ + if (event.defaultPrevented) return; + + // Don't run if right-click or command/control + click or shift + click + if (event.button !== 0 || event.metaKey || event.ctrlKey || event.shiftKey) return; + + // Check if event.target has closest() method + // By @totegi - https://github.com/cferdinandi/smooth-scroll/pull/401/ + if (!('closest' in event.target)) return; + + // Check if a smooth scroll link was clicked + toggle = event.target.closest(selector); + if (!toggle || toggle.tagName.toLowerCase() !== 'a' || event.target.closest(settings.ignore)) return; + + // Only run if link is an anchor and points to the current page + if (toggle.hostname !== window.location.hostname || toggle.pathname !== window.location.pathname || !/#/.test(toggle.href)) return; + + // Get an escaped version of the hash + var hash; + try { + hash = escapeCharacters(decodeURIComponent(toggle.hash)); + } catch(e) { + hash = escapeCharacters(toggle.hash); + } + + // Get the anchored element + var anchor; + if (hash === '#') { + if (!settings.topOnEmptyHash) return; + anchor = document.documentElement; + } else { + anchor = document.querySelector(hash); + } + anchor = !anchor && hash === '#top' ? document.documentElement : anchor; + + // If anchored element exists, scroll to it + if (!anchor) return; + event.preventDefault(); + setHistory(settings); + smoothScroll.animateScroll(anchor, toggle); + + }; + + /** + * Animate scroll on popstate events + */ + var popstateHandler = function () { + + // Stop if history.state doesn't exist (ex. if clicking on a broken anchor link). + // fixes `Cannot read property 'smoothScroll' of null` error getting thrown. + if (history.state === null) return; + + // Only run if state is a popstate record for this instantiation + if (!history.state.smoothScroll || history.state.smoothScroll !== JSON.stringify(settings)) return; + + // Get the anchor + var anchor = history.state.anchor; + if (typeof anchor === 'string' && anchor) { + anchor = document.querySelector(escapeCharacters(history.state.anchor)); + if (!anchor) return; + } + + // Animate scroll to anchor link + smoothScroll.animateScroll(anchor, null, {updateURL: false}); + + }; + + /** + * Destroy the current initialization. + */ + smoothScroll.destroy = function () { + + // If plugin isn't already initialized, stop + if (!settings) return; + + // Remove event listeners + document.removeEventListener('click', clickHandler, false); + window.removeEventListener('popstate', popstateHandler, false); + + // Cancel any scrolls-in-progress + smoothScroll.cancelScroll(); + + // Reset variables + settings = null; + anchor = null; + toggle = null; + fixedHeader = null; + eventTimeout = null; + animationInterval = null; + + }; + + /** + * Initialize Smooth Scroll + * @param {Object} options User settings + */ + var init = function () { + + // feature test + if (!supports()) throw 'Smooth Scroll: This browser does not support the required JavaScript methods and browser APIs.'; + + // Destroy any existing initializations + smoothScroll.destroy(); + + // Selectors and variables + settings = extend(defaults, options || {}); // Merge user options with defaults + fixedHeader = settings.header ? document.querySelector(settings.header) : null; // Get the fixed header + + // When a toggle is clicked, run the click handler + document.addEventListener('click', clickHandler, false); + + // If updateURL and popState are enabled, listen for pop events + if (settings.updateURL && settings.popstate) { + window.addEventListener('popstate', popstateHandler, false); + } + + }; + + + // + // Initialize plugin + // + + init(); + + + // + // Public APIs + // + + return smoothScroll; + +}; + +export default SmoothScroll; \ No newline at end of file diff --git a/src/smooth-scroll.js b/src/smooth-scroll.js new file mode 100755 index 0000000..e444ec8 --- /dev/null +++ b/src/smooth-scroll.js @@ -0,0 +1,3 @@ +import SmoothScroll from './core.js'; + +export default SmoothScroll; \ No newline at end of file diff --git a/src/smooth-scroll.polyfills.js b/src/smooth-scroll.polyfills.js new file mode 100755 index 0000000..da09ab8 --- /dev/null +++ b/src/smooth-scroll.polyfills.js @@ -0,0 +1,6 @@ +import './_closest.polyfill.js'; +import './_customEvent.polyfill.js'; +import './_requestAnimationFrame.polyfill.js'; +import SmoothScroll from './core.js'; + +export default SmoothScroll; \ No newline at end of file