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.

| | Sizeby Bundlefobia | Benchmark Size * | Loading timeon a slow 3g * | | :----------------------------------------------------: | :-----------------------------------------------------------------------------------------------------: | :---------------: | :-----------------------------: | | react-minimal-pie-chart (v8.4.0) | | 1.93 KB | ~39 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 | numberor:(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 | CSSObjector:(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 | CSSObjector:(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):