Funnel Graph JS is a library for generating funnel charts using SVG, utilizing D3 JS
It supports horizontal and vertical funnel charts, offers options for solid colors and gradients, and can generate two-dimensional funnel charts.

This project is a fork of the funnel-graph-js project initiated by greghub. It has been entirely refactored using D3.js, although the core code that creates the paths remains unchanged.
The funnel graph is created as a single SVG unit, without combining any HTML elements except for the tooltip. This approach ensures a single responsive graph that can be dynamically updated and resized without needing to recreate the graph.

• Graph Update without Recreation
  The graph can now be updated without needing to recreate it.

• Fully Responsive Graph
  The graph, including text information and dividers, is now fully responsive.

• Toggle Text Information
  Text information can be dynamically displayed or hidden.

• Tooltip Support
  Tooltips are available over each area path for additional context.

• Clickable Paths
  Paths within the graph are now clickable, with configurable callback functionality.

• Clickable Labels
  Support has been introduced for adding click handlers to the label area.

• Label and Tooltip Formatting
  Handlers have been added to customize the formatting of labels and tooltip displays.

• Vue2 example
• Vue3 example
• React example

> yarn
> yarn build 

npm i d3-funnel-graph

JS:

import FunnelGraph from 'd3-funnel-graph';
// or import "d3-funnel-graph/dist/css/funnel-graph.min.css"

SCSS:

@import "http://github.com/d3-funnel-graph/dist/scss/variables.scss"
@import "http://github.com/d3-funnel-graph/dist/scss/mixin.scss"
@import "http://github.com/d3-funnel-graph/dist/scss/d3.scss"

var graph = new FunnelGraph({
    container: '.funnel',
    gradientDirection: 'horizontal',
    data: {...},
    displayPercent: true,
    direction: 'horizontal',
    width: 800,
    height: 300,
    margin: { 
      top: 120, 
      right: 60, 
      bottom: 60, 
      left: 60, 
      text: { left: 10, top: 0 } 
    },
    callbacks: {
        click: (event, opts) => {
            // path click by a section
        },
        label: (event, opts) => {
            // top label click
        }
    },
    format: {
        value: (opt) => { 
          // format the top label value
        },
        tooltip: (opt) => {
          // format the tooltip value
        }
    }
});

graph.draw();
// use graph.destroy() for cleanup

• container
  Selector name (e.g., .selector).

• width
  The width of the chart in pixels (e.g., 600).

• height
  The height of the chart in pixels (e.g., 400).

• labels
  Labels to be displayed on each section (e.g., ['Impressions', ...]).

• subLabels
  Used in the tooltip for two-dimensional charts (e.g., ['Direct', ...]).

• colors
  Overrides the default colors (e.g., [ ['#000', ... ], ]).

• values
  The values of the graph (e.g., [ [3500, ...], ]).

• margin
  Margins for the info text (e.g., { top?, right?, bottom?, left?, text: { left?, top? } }).

• gradientDirection
  Direction of the gradient ('vertical' | 'horizontal').

• callbacks
  Object for handling user actions (e.g., { 'click': () => {} }).

  • click
    Callback function for click events.

    • Signature:
      ({ index, value, label, subLabel, sectionIndex }) => {}

    • Parameters:

      • index: The index of the path item that was clicked.
      • sectionIndex: The index of the section containing the clicked path item.
      • value: The value associated with the clicked item.
      • label: The label of the clicked item.
      • subLabel: The sub-label of the clicked item (if applicable).

  • tooltip
    Callback function for tooltip events, overriding the default implementation.
    (event, { label, value, x, y }) => {}

  • tooltipLabel
    Callback function for tooltip events, overriding the default implementation.
    (event, { label, value, x, y, sectionDetails }) => {}

    • Signature:
      (event, { label, value }) => {}

  • label
    Callback function for label events.

    • Signature:
      (event, { index, value, label, subLabel, sectionIndex }) => {}

• format
  Formatting options for text display.

  • value
    Callback function to format values.

    • Signature:
      ({ value }) => {}

  • tooltip
    Callback function to format tooltip content.

    • Signature:
      (opts) => {}

• displayPercent
  Whether percentages should be displayed (true | false).

• details
  Whether details should be displayed (true | false).

• tooltip
  Whether the tooltip should be displayed ((default) true | false).

• tooltipLabel
  Whether the tooltip label should be displayed (true | false (default)).

  Note: Tooltip display depends on the details display for range calculations according to the dividers.

• resize
  Configuration for resizing the graph's paths based on container dimensions.

  • factor
    Adjustment factors for dimensions.

    • width: The width factor (default 0.4).
    • height: The height factor (default 0.4).
    • wait: The wait time (in milliseconds) before invoking the resize callback.

• responsive
  When true, the SVG's width and height are set to 100%. The configured width and height are set in the viewBox.

  Note: Ensure the parent DIV elements are set to 100% for a properly resized graph.

• responsiveWidth
  Enables exclusive responsive width.

• responsiveHeight
  Enables exclusive responsive height.

Go to the code section of the repository and download the ZIP file.
Then, Use the provided resources according to your environment. You can use them directly in plain HTML or by importing (ES6+) them into your project.

CDN:

<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/gh/lastboy/funnel-graph-js@master/dist/css/funnel-graph.min.css">

<script src="https://cdn.jsdelivr.net/gh/lastboy/funnel-graph-js@master/dist/js/funnel-graph.min.js"></script>

CSS:

<link rel="stylesheet" type="text/css" href="../dist/css/funnel-graph.min.css">

JS:

<script src="../dist/js/funnel-graph.min.js"></script>

• To create a responsive graph, the wrapper div elements must have a width and height set to 100%.
• Set the responsive flag to true. This ensures the SVG's width and height are set to 100% of the wrapper dimensions.
• Adjust the graph's width and height to maintain an appropriate aspect ratio that fits your page layout. This will define the viewBox dimensions (e.g., 800/200, 100/100, etc.).

This section can be used with the responsive flag or as a standalone solution. By setting the Resize configuration with the factor properties (width and height), you can make the graph responsive to window resizing and position it precisely as needed.