diff --git a/src/docs/index.md b/src/docs/index.md
deleted file mode 100644
index e55a541..0000000
--- a/src/docs/index.md
+++ /dev/null
@@ -1,57 +0,0 @@
-
- Linear
- Linear (no other options)
-
-
-
- Ease-In
- Quad
- Cubic
- Quart
- Quint
-
-
-
- Ease-In-Out
- Quad
- Cubic
- Quart
- Quint
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- Quad
- Cubic
- Quart
- Quint
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- Non-ASCII Characters
- ä¸æ–‡
-
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- .
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-
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-Back to the top
\ No newline at end of file
diff --git a/src/helpers.js b/src/helpers.js
new file mode 100644
index 0000000..63cc67b
--- /dev/null
+++ b/src/helpers.js
@@ -0,0 +1,69 @@
+/**
+ * Calculate the easing pattern
+ * @private
+ * @link https://gist.github.com/gre/1650294
+ * @param {String} easing Easing pattern
+ * @param {Number} time Time animation should take to complete
+ * @returns {Number}
+ */
+export const easingPattern = function (easing, time) {
+ let pattern;
+ if (easing === 'easeInCubic') pattern = time * time * time; // accelerating from zero velocity
+ if (easing === 'easeOutCubic') pattern = (--time) * time * time + 1; // decelerating to zero velocity
+ if (typeof easing === 'function') pattern = easing(time);
+ return pattern || time; // no easing, no acceleration
+};
+
+/**
+ * Calculate how far to scroll
+ * @private
+ * @param {Element} anchor The anchor element to scroll to
+ * @param {Number} offset Number of pixels by which to offset scroll
+ * @returns {Number}
+ */
+export const getEndLocation = function (anchor, offset) {
+ let location = 0;
+ if (anchor.offsetParent) {
+ do {
+ location += anchor.offsetTop;
+ anchor = anchor.offsetParent;
+ } while (anchor);
+ }
+ location = Math.max(location - offset, 0);
+ return Math.min(location, getDocumentHeight() - getViewportHeight());
+};
+
+/**
+ * Determine the viewport's height
+ * @private
+ * @returns {Number}
+ */
+export const getViewportHeight = () => Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
+
+/**
+ * Determine the document's height
+ * @private
+ * @returns {Number}
+ */
+export const getDocumentHeight = () => {
+ return Math.max(
+ document.body.scrollHeight, document.documentElement.scrollHeight,
+ document.body.offsetHeight, document.documentElement.offsetHeight,
+ document.body.clientHeight, document.documentElement.clientHeight
+ );
+};
+
+/**
+ * Bring the anchored element into focus
+ * @private
+ */
+export const adjustFocus = function (anchor, endLocation) {
+ // Otherwise, bring anchor element into focus
+ anchor.focus();
+ if (document.activeElement.id !== anchor.id) {
+ anchor.setAttribute('tabindex', '-1');
+ anchor.focus();
+ anchor.style.outline = 'none';
+ }
+ window.scrollTo(0, endLocation);
+};
\ No newline at end of file
diff --git a/src/js/smooth-scroll.js b/src/js/smooth-scroll.js
deleted file mode 100755
index 2dae938..0000000
--- a/src/js/smooth-scroll.js
+++ /dev/null
@@ -1,576 +0,0 @@
-(function (root, factory) {
- if ( typeof define === 'function' && define.amd ) {
- define([], factory(root));
- } else if ( typeof exports === 'object' ) {
- module.exports = factory(root);
- } else {
- root.smoothScroll = factory(root);
- }
-})(typeof global !== 'undefined' ? global : this.window || this.global, function (root) {
-
- 'use strict';
-
- //
- // Variables
- //
-
- var smoothScroll = {}; // Object for public APIs
- var supports = 'querySelector' in document && 'addEventListener' in root; // Feature test
- var settings, anchor, toggle, fixedHeader, headerHeight, eventTimeout, animationInterval;
-
- // Default settings
- var defaults = {
- selector: '[data-scroll]',
- selectorHeader: null,
- speed: 500,
- easing: 'easeInOutCubic',
- offset: 0,
- callback: function () {}
- };
-
-
- //
- // Methods
- //
-
- /**
- * Merge two or more objects. Returns a new object.
- * @private
- * @param {Boolean} deep If true, do a deep (or recursive) merge [optional]
- * @param {Object} objects The objects to merge together
- * @returns {Object} Merged values of defaults and options
- */
- var extend = function () {
-
- // Variables
- var extended = {};
- var deep = false;
- var i = 0;
- var length = arguments.length;
-
- // Check if a deep merge
- if ( Object.prototype.toString.call( arguments[0] ) === '[object Boolean]' ) {
- deep = arguments[0];
- i++;
- }
-
- // Merge the object into the extended object
- var merge = function (obj) {
- for ( var prop in obj ) {
- if ( Object.prototype.hasOwnProperty.call( obj, prop ) ) {
- // If deep merge and property is an object, merge properties
- if ( deep && Object.prototype.toString.call(obj[prop]) === '[object Object]' ) {
- extended[prop] = extend( true, extended[prop], obj[prop] );
- } else {
- extended[prop] = obj[prop];
- }
- }
- }
- };
-
- // Loop through each object and conduct a merge
- for ( ; i < length; i++ ) {
- var obj = arguments[i];
- merge(obj);
- }
-
- return extended;
-
- };
-
- /**
- * Get the height of an element.
- * @private
- * @param {Node} elem The element to get the height of
- * @return {Number} The element's height in pixels
- */
- var getHeight = function ( elem ) {
- return Math.max( elem.scrollHeight, elem.offsetHeight, elem.clientHeight );
- };
-
- /**
- * Get the closest matching element up the DOM tree.
- * @private
- * @param {Element} elem Starting element
- * @param {String} selector Selector to match against
- * @return {Boolean|Element} Returns null if not match found
- */
- var getClosest = function ( elem, selector ) {
-
- // Element.matches() polyfill
- if (!Element.prototype.matches) {
- Element.prototype.matches =
- Element.prototype.matchesSelector ||
- Element.prototype.mozMatchesSelector ||
- Element.prototype.msMatchesSelector ||
- Element.prototype.oMatchesSelector ||
- Element.prototype.webkitMatchesSelector ||
- function(s) {
- var matches = (this.document || this.ownerDocument).querySelectorAll(s),
- i = matches.length;
- while (--i >= 0 && matches.item(i) !== this) {}
- return i > -1;
- };
- }
-
- // Get closest match
- for ( ; elem && elem !== document; elem = elem.parentNode ) {
- if ( elem.matches( selector ) ) return elem;
- }
-
- return null;
-
- };
-
- /**
- * Escape special characters for use with querySelector
- * @private
- * @param {String} id The anchor ID to escape
- * @author Mathias Bynens
- * @link https://github.com/mathiasbynens/CSS.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 '#' + result;
-
- };
-
- /**
- * Calculate the easing pattern
- * @private
- * @link https://gist.github.com/gre/1650294
- * @param {String} type Easing pattern
- * @param {Number} time Time animation should take to complete
- * @returns {Number}
- */
- var easingPattern = function ( type, time ) {
- var pattern;
- if ( type === 'easeInQuad' ) pattern = time * time; // accelerating from zero velocity
- if ( type === 'easeOutQuad' ) pattern = time * (2 - time); // decelerating to zero velocity
- if ( type === 'easeInOutQuad' ) pattern = time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; // acceleration until halfway, then deceleration
- if ( type === 'easeInCubic' ) pattern = time * time * time; // accelerating from zero velocity
- if ( type === 'easeOutCubic' ) pattern = (--time) * time * time + 1; // decelerating to zero velocity
- if ( type === 'easeInOutCubic' ) pattern = time < 0.5 ? 4 * time * time * time : (time - 1) * (2 * time - 2) * (2 * time - 2) + 1; // acceleration until halfway, then deceleration
- if ( type === 'easeInQuart' ) pattern = time * time * time * time; // accelerating from zero velocity
- if ( type === 'easeOutQuart' ) pattern = 1 - (--time) * time * time * time; // decelerating to zero velocity
- if ( type === 'easeInOutQuart' ) pattern = time < 0.5 ? 8 * time * time * time * time : 1 - 8 * (--time) * time * time * time; // acceleration until halfway, then deceleration
- if ( type === 'easeInQuint' ) pattern = time * time * time * time * time; // accelerating from zero velocity
- if ( type === 'easeOutQuint' ) pattern = 1 + (--time) * time * time * time * time; // decelerating to zero velocity
- if ( type === 'easeInOutQuint' ) pattern = time < 0.5 ? 16 * time * time * time * time * time : 1 + 16 * (--time) * time * time * time * time; // acceleration until halfway, then deceleration
- return pattern || time; // no easing, no acceleration
- };
-
- /**
- * Calculate how far to scroll
- * @private
- * @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
- * @returns {Number}
- */
- var getEndLocation = function ( anchor, headerHeight, offset ) {
- var location = 0;
- if (anchor.offsetParent) {
- do {
- location += anchor.offsetTop;
- anchor = anchor.offsetParent;
- } while (anchor);
- }
- location = Math.max(location - headerHeight - offset, 0);
- return Math.min(location, getDocumentHeight() - getViewportHeight());
- };
-
- /**
- * Determine the viewport's height
- * @private
- * @returns {Number}
- */
- var getViewportHeight = function() {
- return Math.max( document.documentElement.clientHeight, root.innerHeight || 0 );
- };
-
- /**
- * Determine the document's height
- * @private
- * @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
- );
- };
-
- /**
- * Convert data-options attribute into an object of key/value pairs
- * @private
- * @param {String} options Link-specific options as a data attribute string
- * @returns {Object}
- */
- var getDataOptions = function ( options ) {
- return !options || !(typeof JSON === 'object' && typeof JSON.parse === 'function') ? {} : JSON.parse( options );
- };
-
- /**
- * Get the height of the fixed header
- * @private
- * @param {Node} header The header
- * @return {Number} The height of the header
- */
- var getHeaderHeight = function ( header ) {
- return !header ? 0 : ( getHeight( header ) + header.offsetTop );
- };
-
- /**
- * Bring the anchored element into focus
- * @private
- */
- var adjustFocus = function ( anchor, endLocation, isNum ) {
-
- // 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.id !== anchor.id ) {
- anchor.setAttribute( 'tabindex', '-1' );
- anchor.focus();
- anchor.style.outline = 'none';
- }
- root.scrollTo( 0 , endLocation );
-
- };
-
- /**
- * Start/stop the scrolling animation
- * @public
- * @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 ) {
-
- // Options and overrides
- var overrides = getDataOptions( toggle ? toggle.getAttribute('data-options') : null );
- var animateSettings = extend( settings || defaults, options || {}, overrides ); // 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 = root.pageYOffset; // Current location on the page
- if ( animateSettings.selectorHeader && !fixedHeader ) {
- // Get the fixed header if not already set
- fixedHeader = document.querySelector( animateSettings.selectorHeader );
- }
- if ( !headerHeight ) {
- // Get the height of a fixed header if one exists and not already set
- headerHeight = getHeaderHeight( fixedHeader );
- }
- var endLocation = isNum ? anchor : getEndLocation( anchorElem, headerHeight, parseInt((typeof animateSettings.offset === 'function' ? animateSettings.offset() : animateSettings.offset), 10) ); // Location to scroll to
- var distance = endLocation - startLocation; // distance to travel
- var documentHeight = getDocumentHeight();
- var timeLapsed = 0;
- var percentage, position;
-
- /**
- * Stop the scroll animation when it reaches its target (or the bottom/top of page)
- * @private
- * @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, animationInterval ) {
- var currentLocation = root.pageYOffset;
- if ( position == endLocation || currentLocation == endLocation || ( (root.innerHeight + currentLocation) >= documentHeight ) ) {
-
- // Clear the animation timer
- clearInterval(animationInterval);
-
- // Bring the anchored element into focus
- adjustFocus( anchor, endLocation, isNum );
-
- // Run callback after animation complete
- animateSettings.callback( anchor, toggle );
-
- }
- };
-
- /**
- * Loop scrolling animation
- * @private
- */
- var loopAnimateScroll = function () {
- timeLapsed += 16;
- percentage = ( timeLapsed / parseInt(animateSettings.speed, 10) );
- percentage = ( percentage > 1 ) ? 1 : percentage;
- position = startLocation + ( distance * easingPattern(animateSettings.easing, percentage) );
- root.scrollTo( 0, Math.floor(position) );
- stopAnimateScroll(position, endLocation, animationInterval);
- };
-
- /**
- * Set interval timer
- * @private
- */
- var startAnimateScroll = function () {
- clearInterval(animationInterval);
- animationInterval = setInterval(loopAnimateScroll, 16);
- };
-
- /**
- * Reset position to fix weird iOS bug
- * @link https://github.com/cferdinandi/smooth-scroll/issues/45
- */
- if ( root.pageYOffset === 0 ) {
- root.scrollTo( 0, 0 );
- }
-
- // Start scrolling animation
- startAnimateScroll();
-
- };
-
- /**
- * Handle has change event
- * @private
- */
- var hashChangeHandler = function (event) {
-
- // Get hash from URL
- // var hash = decodeURIComponent( escapeCharacters( root.location.hash ) );
- var hash;
- try {
- hash = escapeCharacters( decodeURIComponent( root.location.hash ) );
- } catch(e) {
- hash = escapeCharacters( root.location.hash );
- }
-
- // Only run if there's an anchor element to scroll to
- if ( !anchor ) return;
-
- // Reset the anchor element's ID
- anchor.id = anchor.getAttribute( 'data-scroll-id' );
-
- // Scroll to the anchored content
- smoothScroll.animateScroll( anchor, toggle );
-
- // Reset anchor and toggle
- anchor = null;
- toggle = null;
-
- };
-
- /**
- * If smooth scroll element clicked, animate scroll
- * @private
- */
- var clickHandler = function (event) {
-
- // Don't run if right-click or command/control + click
- if ( event.button !== 0 || event.metaKey || event.ctrlKey ) return;
-
- // Check if a smooth scroll link was clicked
- toggle = getClosest( event.target, settings.selector );
- if ( !toggle || toggle.tagName.toLowerCase() !== 'a' ) return;
-
- // Only run if link is an anchor and points to the current page
- if ( toggle.hostname !== root.location.hostname || toggle.pathname !== root.location.pathname || !/#/.test(toggle.href) ) return;
-
- // Get the sanitized hash
- // var hash = decodeURIComponent( escapeCharacters( toggle.hash ) );
- // console.log(hash);
- var hash;
- try {
- hash = escapeCharacters( decodeURIComponent( toggle.hash ) );
- } catch(e) {
- hash = escapeCharacters( toggle.hash );
- }
-
- // If the hash is empty, scroll to the top of the page
- if ( hash === '#' ) {
-
- // Prevent default link behavior
- event.preventDefault();
-
- // Set the anchored element
- anchor = document.body;
-
- // Save or create the ID as a data attribute and remove it (prevents scroll jump)
- var id = anchor.id ? anchor.id : 'smooth-scroll-top';
- anchor.setAttribute( 'data-scroll-id', id );
- anchor.id = '';
-
- // If no hash change event will happen, fire manually
- // Otherwise, update the hash
- if ( root.location.hash.substring(1) === id ) {
- hashChangeHandler();
- } else {
- root.location.hash = id;
- }
-
- return;
-
- }
-
- // Get the anchored element
- anchor = document.querySelector( hash );
-
- // If anchored element exists, save the ID as a data attribute and remove it (prevents scroll jump)
- if ( !anchor ) return;
- anchor.setAttribute( 'data-scroll-id', anchor.id );
- anchor.id = '';
-
- // If no hash change event will happen, fire manually
- if ( toggle.hash === root.location.hash ) {
- event.preventDefault();
- hashChangeHandler();
- }
-
- };
-
- /**
- * On window scroll and resize, only run events at a rate of 15fps for better performance
- * @private
- * @param {Function} eventTimeout Timeout function
- * @param {Object} settings
- */
- var resizeThrottler = function (event) {
- if ( !eventTimeout ) {
- eventTimeout = setTimeout(function() {
- eventTimeout = null; // Reset timeout
- headerHeight = getHeaderHeight( fixedHeader ); // Get the height of a fixed header if one exists
- }, 66);
- }
- };
-
- /**
- * Destroy the current initialization.
- * @public
- */
- smoothScroll.destroy = function () {
-
- // If plugin isn't already initialized, stop
- if ( !settings ) return;
-
- // Remove event listeners
- document.removeEventListener( 'click', clickHandler, false );
- root.removeEventListener( 'resize', resizeThrottler, false );
-
- // Reset varaibles
- settings = null;
- anchor = null;
- toggle = null;
- fixedHeader = null;
- headerHeight = null;
- eventTimeout = null;
- animationInterval = null;
- };
-
- /**
- * Initialize Smooth Scroll
- * @public
- * @param {Object} options User settings
- */
- smoothScroll.init = function ( options ) {
-
- // feature test
- if ( !supports ) return;
-
- // Destroy any existing initializations
- smoothScroll.destroy();
-
- // Selectors and variables
- settings = extend( defaults, options || {} ); // Merge user options with defaults
- fixedHeader = settings.selectorHeader ? document.querySelector( settings.selectorHeader ) : null; // Get the fixed header
- headerHeight = getHeaderHeight( fixedHeader );
-
- // When a toggle is clicked, run the click handler
- document.addEventListener( 'click', clickHandler, false );
-
- // Listen for hash changes
- root.addEventListener('hashchange', hashChangeHandler, false);
-
- // If window is resized and there's a fixed header, recalculate its size
- if ( fixedHeader ) {
- root.addEventListener( 'resize', resizeThrottler, false );
- }
-
- };
-
-
- //
- // Public APIs
- //
-
- return 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..1ee281e
--- /dev/null
+++ b/src/smooth-scroll.js
@@ -0,0 +1,82 @@
+import { easingPattern, getEndLocation, getViewportHeight, getDocumentHeight, adjustFocus } from './helpers';
+
+const defaults = {
+ speed: 500,
+ easing: 'easeOutCubic',
+ offset: 0,
+ callback: function () { }
+};
+
+/**
+ * Start/stop the scrolling animation
+ * @public
+ * @param {Node|Number} target The element or position to scroll to
+ * @param {Object} options
+ */
+function animateScroll(target, options) {
+ // Options
+ var animateSettings = {};
+ Object.assign(animateSettings, defaults, options || {});
+
+ // Selectors and variables
+ const isNum = (typeof target === 'number');
+ if (!isNum && !(target instanceof Element))
+ return;
+
+ const offset = parseInt((typeof animateSettings.offset === 'function' ? animateSettings.offset() : animateSettings.offset), 10);
+ const startLocation = window.pageYOffset; // Current location on the page
+ const endLocation = isNum ? target : getEndLocation(target, offset); // Location to scroll to
+ const distance = endLocation - startLocation; // distance to travel
+ const timeEnd = parseInt(animateSettings.speed, 10);
+ const documentHeight = getDocumentHeight();
+ let timeLapsed = 0;
+ let percentage;
+ let position;
+ let timeStart;
+ let animationInterval;
+
+ /**
+ * Loop scrolling animation
+ * @private
+ */
+ const loopAnimateScroll = function (timestamp) {
+ if (!timeStart) {
+ timeStart = timestamp;
+ }
+
+ const frameLength = timestamp - timeStart;
+ timeLapsed += frameLength;
+ const percentage = Math.min((timeLapsed / timeEnd), 1);
+ const newPosition = startLocation + (distance * easingPattern(animateSettings.easing, percentage));
+ window.scrollTo(0, Math.floor(newPosition));
+
+ var currentLocation = window.pageYOffset;
+ if (newPosition === endLocation || currentLocation === endLocation || ((window.innerHeight + currentLocation) >= documentHeight)) {
+ // Bring the anchored element into focus
+ if (!isNum) {
+ adjustFocus(target, endLocation);
+ if (target.id) {
+ location.hash = target.id;
+ }
+ }
+
+ // Run callback after animation complete
+ animateSettings.callback(target);
+ } else {
+ animationInterval = requestAnimationFrame(loopAnimateScroll);
+ }
+ };
+
+ /**
+ * Reset position to fix weird iOS bug
+ * @link https://github.com/cferdinandi/smooth-scroll/issues/45
+ */
+ if (window.pageYOffset === 0) {
+ window.scrollTo(0, 0);
+ }
+
+ // Start scrolling animation
+ requestAnimationFrame(loopAnimateScroll)
+}
+
+export default animateScroll;
\ No newline at end of file