dygraphs

v2.2.1

Published

2 years ago

dygraphs is a fast, flexible open source JavaScript charting library.

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dygraphs javascript visualization canvas chart timeseries

dygraphs JavaScript charting library

The dygraphs JavaScript library produces interactive, zoomable charts of time series:

sample graph

Learn more about it at dygraphs.com.

Get help with dygraphs on Stack Overflow (preferred) and Google Groups.

Features

Plots time series without using an external server or Flash
Supports error bands around data series
Interactive pan and zoom
Displays values on mouseover
Adjustable averaging period
Extensive set of options for customization.
Compatible with the Google Visualization API

Minimal Example

<html>
<head>
<script type="text/javascript" src="dygraph.js"></script>
<link rel="stylesheet" type="text/css" href="dygraph.css" />
</head>
<body>
<div id="graphdiv"></div>
<script type="text/javascript"><!--//--><![CDATA[//><!--
  Dygraph.onDOMready(function onDOMready() {  // or jQuery $() etc.
    g = new Dygraph(
        document.getElementById("graphdiv"),  // containing div
        "Date,Temperature\n" +                // the data series
        "2008-05-07,75\n" +
        "2008-05-08,70\n" +
        "2008-05-09,80\n",
        { }                                   // the options
      );
  });
//--><!]]></script>
</body>
</html>

Learn more by reading the tutorial and seeing demonstrations of what dygraphs can do in the gallery. You can get dygraph.js and dygraph.css from UNPKG, cdnjs or from NPM (see below).

Usage with a module loader

Get dygraphs from NPM:

npm install dygraphs

Do not install from the git repository! Always use a tarball install, which contains the prebuilt files; npm fails to build the source code on install from github. (The tarball from the GitHub Registry is fine.)

You'll find pre-built JS & CSS files in node_modules/dygraphs/dist/. If you're using a module bundler like browserify or webpack, you can import dygraphs:

import Dygraph from 'dygraphs';
// or: const Dygraph = require('dygraphs');

const g = new Dygraph('graphdiv', data, { /* options */ });

Check out the dygraphs-es6 repo for a fully-worked example.

Development

To get going, install the following Debian packages…

jq
mksh
pax
python3

… clone the repo and run:

npm install
npm run build-jsonly

Then open tests/demo.html in your browser.

Read more about the dygraphs development process in the developer guide.

License(s)

dygraphs is available under the MIT license, included in LICENSE.txt.

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