Visualize and examine complex flow systems using interconnected nodes and links.
Engage with the Sankey Diagram through interactive features such as tooltips and legends.
Visualize data effectively with support for both vertical and horizontal orientations.

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Overview

The JavaScript Sankey Diagram is a flow-oriented visualization that displays values proportionally, highlighting how data moves or transfers between different stages of a process. It is a robust solution for representing complex systems, energy distribution, or any workflow that involves transitions across stages.

Why choose the Syncfusion JavaScript Sankey Diagram?

Interactive Sankey Diagram

Interactive tooltip behavior allows users to explore the Sankey Diagram and view detailed information about nodes and their connecting links.

Rich feature set

The JavaScript Sankey Diagram includes support for legends, layout orientations, labels, titles, themes, events, customizable nodes and links, as well as printing and export options.

Adapts to any resolution

The Sankey Diagram has a highly responsive layout that adapts seamlessly to desktops and mobile devices. It performs consistently across iOS, Android, and Windows platforms.

Attractive, customizable themes

Pick from visually modern designs with multiple built-in themes, including Material 3, Fluent 2, Tailwind CSS, Bootstrap, Material, and Fabric.

Elegant animation

The Sankey Diagram features smooth and refined animations that display data changes with fluid transitions.

JavaScript Sankey Diagram code example

You can begin using the JavaScript Sankey Diagram quickly with only a few lines of HTML and JavaScript code, as shown below. Additionally, explore this JavaScript Sankey Diagram sample to learn how to render and configure the component effectively.

html
ts
<!DOCTYPE html>
<html>
<head></head>
<body> 
    <div id="container">
     <div id="sankey"></div>
    </div>
</body>
</html>
import { Sankey, SankeyLegend } from '@syncfusion/ej2-charts';
Sankey.Inject(SankeyLegend);

const nodes = [
    { id: 'Female', label: { text: 'Female (58%)' } },
    { id: 'Male', label: { text: 'Male (42%)' } },
    { id: 'Tablet', label: { text: 'Tablet (12%)' } },
    { id: 'Mobile', label: { text: 'Mobile (40%)' } },
    { id: 'Desktop', label: { text: 'Desktop (48%)' } },
    { id: '< 18', label: { text: '< 18 years (8%)' } },
    { id: '18-26', label: { text: '18-26 years (35%)' } },
    { id: '27-40', label: { text: '27-40 years (38%)' } },
    { id: '> 40', label: { text: '> 40 years (19%)' } }
];

const links = [
    { sourceId: 'Female', targetId: 'Tablet', value: 12 },
    { sourceId: 'Female', targetId: 'Mobile', value: 14 },
    { sourceId: 'Female', targetId: 'Desktop', value: 32 },
    { sourceId: 'Male', targetId: 'Mobile', value: 26 },
    { sourceId: 'Male', targetId: 'Desktop', value: 16 },
    { sourceId: 'Tablet', targetId: '< 18', value: 4 },
    { sourceId: 'Tablet', targetId: '> 40', value: 8 },
    { sourceId: 'Mobile', targetId: '< 18', value: 4 },
    { sourceId: 'Mobile', targetId: '18-26', value: 24 },
    { sourceId: 'Mobile', targetId: '27-40', value: 10 },
    { sourceId: 'Mobile', targetId: '> 40', value: 2 },
    { sourceId: 'Desktop', targetId: '18-26', value: 11 },
    { sourceId: 'Desktop', targetId: '27-40', value: 28 },
    { sourceId: 'Desktop', targetId: '> 40', value: 9 }
]

let sankey: Sankey = new Sankey({
    title: "Device Usage",
    nodes: nodes,
    links: links,
    nodeStyle: { width: 30, padding: 10 },
    linkStyle: { colorType: 'Source' },
    legendSettings: { visible: true, position: 'Bottom' }
}, '#sankey');

Legend in JavaScript Sankey Diagram.

Legends

The JavaScript Sankey Diagram supports configurable legends that supply additional context about nodes. When hovering over a legend item, the associated data flow paths are automatically highlighted.

Tooltips

The Sankey Diagram provides a tooltip that displays detailed information about node and link values when the mouse pointer moves over them.

Tooltip in JavaScript Sankey Diagram.

Print and export JavaScript Sankey Diagram.

Print and export

Export the JavaScript Sankey Diagram as a PDF file or in image formats such as PNG and JPEG on the client side. The rendered diagram can also be printed directly from the browser.

Orientation

The Sankey Diagram supports both horizontal and vertical layouts, allowing flexible visualization based on the data’s structure and directional flow.

Orientations in JavaScript Sankey Diagram.

Node labels in JavaScript Sankey Diagram.

Node labels

Labels can be applied to nodes to display descriptive information, improving overall clarity.

Customization

Built-in APIs enable customization of node widths and allow control over the colors of nodes, links, and labels to match your design requirements.

Customization in JavaScript Sankey Diagram.

Accessibility

Keyboard navigation in JavaScript Sankey Diagram.

All Sankey Diagram elements are fully operable using keyboard input. Core interactions, including legend highlighting, can be performed without mouse usage, providing an accessible experience.

Accessibility and screen reader support in JavaScript Sankey Diagram.

Screen readers

The Sankey Diagram offers full WAI-ARIA compliance, ensuring compatibility with screen readers and other assistive technologies. High-contrast visuals support users with low vision, while accessible UI descriptions further improve usability.

Show right-to-left language in JavaScript Sankey Diagram.

Right to left (RTL)

RTL rendering displays the Sankey Diagram’s layout and text from right to left, enhancing usability and accessibility for users working with right-to-left languages.

Not sure how to create your first JavaScript Sankey Diagram component? Our documentation can help.

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Frequently Asked Questions

✅ Why should you choose the Syncfusion^® JavaScript Sankey Diagram component?

With the Syncfusion JavaScript Sankey Diagram control, you can:

Visualize and analyze complex flow systems with nodes and links.
Enjoy simple configuration and APIs.
Deploy confidently to all modern browsers.
Implement a touch-friendly and responsive component.
Take advantage of expansive learning resources such as demos and documentation to get started quickly.

✅ Can I download and utilize the Syncfusion JavaScript Sankey Diagram component for free?

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue, 5 or fewer developers, and 10 or fewer total employees.

✅ How do I get started with Syncfusion JavaScript Sankey Diagram?

A good place to start would be our comprehensive getting started documentation.

✅ Where can I find the Syncfusion JavaScript Sankey Diagram demo?

You can find our JavaScript Sankey Diagram demo here.

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