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node-chartjs-v12

node-chartjs

Chart.js on the server in Node.js 8.x.x or later

Based on previous work by https://github.com/vmpowerio/chartjs-node

With a few improvements we think:

• Uses the newer 9.x.x 11.x.x version of JSDOM
• Does not pollute node's global namespace

Note that we strongly advise against trying to "execute scripts" by mashing together the jsdom and Node global environments (e.g. by doing global.window = dom.window), and then executing scripts or test code inside the Node global environment. Instead, you should treat jsdom like you would a browser, and run all scripts and tests that need access to a DOM inside the jsdom environment, using window.eval or runScripts: "dangerously". This might require, for example, creating a browserify bundle to execute as a <script> element—just like you would in a browser.

💖 Made possibly by:

• node-canvas - a Cairo backed Canvas implementation for NodeJS. See installation wiki

• jsdom - a implementation of the WHATWG DOM and HTML standards for use with node.js

Getting Started

Peer Dependencies

You'll need to npm install chart.js as it is a peer dependency of node-chartjs. Tested with chart.js@2.4.x any later and we have artifacts there are some issues open upstream, we anticipate fixes in 2.8.x*

Also make sure you have installed canvas' dependencies (see installation wiki)

npm install node-chartjs

Usage

const Chart = require('node-chartjs')
const chart = new Chart(200, 200) // 1000 x 1000 is default

chart.makeChart({ ... })
.then(res => {
  chart.drawChart()

  chart.toFile('test.line.png')
    .then(_ => {
      // file is written
    })
})

See examples folder for more