React minimal pie chart

Lightweight React SVG pie charts, with versatile options and CSS animation included. ~2kB gzipped. 👏 Demo 👏.

Why?

Because Recharts is awesome, but when you just need a simple pie/donought chart, 2kB are usually enough.

	Size by Bundlefobia	Benchmark Size *	Loading time on a slow 3g *
react-minimal-pie-chart (v9.0.0)		1.99 KB	~40 ms
rechart (v1.8.5)		96.9 KB	~1900 ms
victory-pie (v34.1.3)		50.5 KB	~1100 ms
react-apexcharts (v1.3.7)		114.6 KB	~2300 ms
react-vis (v1.11.7)		78.3 KB	~1600 ms

* Benchmark carried out with size-limit with a "real-world" setup: see benchmark repo. (What matter here are not absolute values but the relation between magnitudes)

Features

• < 2kB gzipped
• Versatile: Pie, Donut, Loading, Completion charts (see Demo)
• Customizable chart labels and CSS animations
• Written in Typescript
• No dependencies

Installation

npm install react-minimal-pie-chart

If you don't use a package manager, react-minimal-pie-chart exposes also an UMD module ready for the browser.

https://unpkg.com/react-minimal-pie-chart/dist/index.js

Minimum supported Typescript version: >= 3.8

Usage

import { PieChart } from 'react-minimal-pie-chart';

<PieChart
  data={[
    { title: 'One', value: 10, color: '#E38627' },
    { title: 'Two', value: 15, color: '#C13C37' },
    { title: 'Three', value: 20, color: '#6A2135' },
  ]}
/>;

Options

Property	Type	Description	Default
data	DataEntry[]	Source data. Each entry represents a chart segment	[]
lineWidth	number (%)	Line width of each segment. Percentage of chart's radius	100
startAngle	number	Start angle of first segment	0
lengthAngle	number	Total angle taken by the chart (can be negative to make the chart clockwise!)	360
totalValue	number	Total value represented by the full chart	-
paddingAngle	number	Angle between two segments	-
rounded	boolean	Round line caps of each segment	-
segmentsShift	number or: (segmentIndex) => number	Translates segments radially. If number set, provide shift value relative to viewBoxSize space. If function, return a value for each segment. (radius prop might be adjusted to prevent segments from overflowing chart's boundaries)	-
segmentsStyle	CSSObject or: (segmentIndex) => CSSObject	Style object assigned to each segment. If function, return a value for each segment. (Warning: SVG only supports its own CSS props).	-
segmentsTabIndex	number	tabindex attribute assigned to segments	-
label	(labelRenderProps) => string | number | ReactElement	A function returning a label value or the SVG element to be rendered as label	-
labelPosition	number (%)	Label position from origin. Percentage of chart's radius (50 === middle point)	50
labelStyle	CSSObject or: (segmentIndex) => CSSObject	Style object assigned to each label. If function set, return style for each label. (Warning: SVG only supports its own CSS props).	-
animate	boolean	Animate segments on component mount	-
animationDuration	number	Animation duration in ms	500
animationEasing	string	A CSS easing function	ease-out
reveal	number (%)	Turn on CSS animation and reveal just a percentage of each segment	-
background	string	Segments' background color	-
children	ReactElement (svg)	Elements rendered as children of SVG element (eg. SVG defs and gradient elements)	-
radius	number (user units)	Radius of the pie (relative to viewBoxSize space)	50
center	[number, number]	x and y coordinates of center (relative to viewBoxSize space)	[50, 50]
viewBoxSize	[number, number]	width and height of SVG viewBox attribute	[100, 100]
onBlur	(e, segmentIndex) => void	onBlur event handler for each segment	-
onClick	(e, segmentIndex) => void	onClick event handler for each segment	-
onFocus	(e, segmentIndex) => void	onFocus event handler for each segment	-
onKeyDown	(e, segmentIndex) => void	onKeyDown event handler for each segment	-
onMouseOut	(e, segmentIndex) => void	onMouseOut event handler for each segment	-
onMouseOver	(e, segmentIndex) => void	onMouseOver event handler for each segment	-
	.oOo.oOo.oOo.oOo.oOo.oOo.oOo.

Prop types are exposed for convenience:

import type { PieChartProps } from 'react-minimal-pie-chart';

About data prop

data prop expects an array of chart entries as follows:

type Data = {
  color: string;
  value: number;
  key?: string | number;
  title?: string | number;
  [key: string]: any;
}[];

Each entry accepts any custom property plus the following optional ones:

• key: custom value to be used as segments element keys

• title: title element rendered as segment's child

Custom labels with label render prop

label prop accepts a function returning the string, number or element rendered as label for each segment:

<PieChart
  label={(labelRenderProps: LabelRenderProps) =>
    number | string | React.ReactElement | undefined | null
  }
/>

The function receives labelRenderProps object as single argument:

type LabelRenderProps = {
  x: number;
  y: number;
  dx: number;
  dy: number;
  textAnchor: string;
  dataEntry: {
    ...props.data[dataIndex]
    // props.data entry relative to the label extended with:
    startAngle: number;
    degrees: number;
    percentage: number;
  };
  dataIndex: number;
  style: React.CSSProperties;
};

Label prop, common scenarios

Render entries' values as labels:

label={({ dataEntry }) => dataEntry.value}

Render segment's percentage as labels:

label={({ dataEntry }) => `${Math.round(dataEntry.percentage)} %`}

See examples in the demo source.

How to

User interactions with the chart

See demo and relative source here and here.

Custom tooltip

See demo and relative source.

Browsers support

Here is an updated browsers support list 🔍.

The main requirement of this library is an accurate rendering of SVG Stroke properties.

Please consider that Math.sign and Object.assign polyfills are required to support legacy browsers.

Misc

How svg arc paths work?

• http://xahlee.info/js/svg_circle_arc.html
• https://codepen.io/lingtalfi/pen/yaLWJG

How SVG animations work?

This library uses the stroke-dasharray + stroke-dashoffset animation strategy described here.

Todo's

• Consider moving storybook deployment to CI
• Consider using transform to mutate segments/labels positions
• Consider abstracting React bindings to re-use business logic with other frameworks
• Provide a way to supply svg element with any extra prop
• Find a better solution to assign default props

Contributors

Thanks to you all (emoji key):

Andrea Carraro 💻 📖 🚇 ⚠️ 👀	Stephane Rufer 🐛 💻	Jørgen Aaberg 💻	Tobiah Rex 🐛	Edward Xiao 🐛	David Konsumer 💻 📖 💡 🤔	Ori 🤔
Emmanouil Konstantinidis 🐛	yuruc 💻	luca-esse 🐛	Oscar Mendoza 🐛 💻	damien-git 🐛 🤔	Vianney Stroebel 🐛 🤔	Maxime Zielony 🐛 💻
Raz Kedem 🐛	Blocksmith 🐛	Jamie Talbot 🐛	Oscar Yixuan Chen 🐛	RuiRocha1991 🐛	Roman Kushyn 🐛	Divjot Singh 💻