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chartogram

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chartogram

Charts in JS with no dependencies

0.1.9
Source
npm

Version published: 6 years ago

Weekly downloads: 2; increased by100%

Maintainers: 1

Weekly downloads

Created: 6 years ago

Source

chartogram

Charts in JS with no dependencies.

DEMO

Originally created as part of Telegram Charts Contest.

Screenshots

Day

View in full resolution

Night

View in full resolution

Use

The default exported function takes three arguments:

The DOM element where the chart will be rendered.
Chart data.
Chart title.

Chart data must have shape:

{
  x: {
    points: Number[]
  },
  y: {
    id: string,
    name: string,
    points: Number[]
  }[]
}

So there must be a single x and one or more ys.

Example:

{
  x: {
    points: [
      1553769000,
      1553770000,
      1553771000
    ]
  },
  y: [
    {
      id: 'y1',
      name: 'Temperature',
      points: [
        60,
        69,
        65
      ]
    },
    {
      id: 'y2',
      name: 'CPU load',
      points: [
        95,
        98,
        90
      ]
    }
  ]
}

The default exported function returns another function which must be called in case of "destroying" the chart (it cleans up global event listeners and resets the DOM node).

Browser

<!DOCTYPE html>
<html>
  <head>
    <script src="https://unpkg.com/chartogram@[version]/bundle/chartogram.js"></script>
    <link rel="stylesheet" href="https://unpkg.com/chartogram@[version]/style.css"/>
  </head>

  <body>
    <section id="chart"></section>
    <script>
      chartogram(document.getElementById('chart'), data, 'Title')
    </script>
  </body>
</html>

where [version] is an npm package version range (for example, 0.1.x or ^0.1.0).

React

npm install chartogram --save

import React from 'react'
import PropTypes from 'prop-types'
import chartogram from 'chartogram'
import 'chartogram/style.css'

class Chartogram extends React.Component {
  static propTypes = {
    data: PropTypes.shape({
      x: PropTypes.shape({
        points: PropTypes.arrayOf(PropTypes.number).isRequired
      }).isRequired,
      y: PropTypes.arrayOf(PropTypes.shape({
        id: PropTypes.string.isRequired,
        name: PropTypes.string.isRequired,
        points: PropTypes.arrayOf(PropTypes.number).isRequired
      })).isRequired
    }).isRequired,
    title: PropTypes.string.isRequired
  }

  node = React.createRef()

  componentDidMount() {
    const { data, title } = this.props
    this.cleanUp = chartogram(this.node.current, data, title)
  }

  componentWillUnmount() {
    this.cleanUp
  }

  render() {
    return <section ref={this.node}/>
  }
}

Night mode

Add chartogram--night-mode CSS class to the chart <section/> to switch to Night Mode.

Custom colors

To customize colors override the CSS variables:

body {
	--content-color: black;
	--background-color: white;
	--night-mode-transition-duration: 300ms;
}

.night-mode {
	--background-color: rgb(36,47,62);
	--content-color: white;
}

.chartogram {
	--chartogram-background-color: var(--background-color);
	--chartogram-content-color: var(--content-color);
	--chartogram-night-mode-transition-duration: var(--night-mode-transition-duration);
	/* See `style.css` for the list of all available CSS variables. */
	--chartogram-font-size: 16px;
	--chartogram-tooltip-background-color: white;
}

.chartogram--night-mode {
	/* See `style.css` for the list of all available CSS variables. */
	--chartogram-tooltip-background-color: #293544;
}

Browser compatibility

Tested in Chrome, Firefox, Microsoft Edge and iOS Safari.

For some reason doesn't show the .chartogram__canvas SVG element when it's wrapped in .chartogram__canvas-wrapper in Internet Explorer.

The styles use CSS variables which work everywhere except Internet Explorer.

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Package last updated on 02 Apr 2019

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