# React minimal pie chart [![Build Status][ci-badge]][ci] [![Npm version][npm-version-badge]][npm] [![Coveralls][coveralls-badge]][coveralls] [![Bundle size][bundlephobia-badge]][bundlephobia] Lightweight React **SVG pie charts**, with **versatile options** and **CSS animation** included. **< 2kB** gzipped. [👏 Demo 👏][storybook].

React minimal pie chart preview

## Why? Because [Recharts][recharts-github] is awesome, but when you just need a simple pie/donought chart, **~~3kB~~ 2kB** are usually enough. | | Size
by Bundlefobia | Benchmark Size \* | Loading time
on a slow 3g \* | | :----------------------------------------------------: | :-----------------------------------------------------------------------------------------------------: | :---------------: | :-----------------------------: | | react-minimal-pie-chart (_v8.4.0_) | [![Bundle size: React minimal pie chart][bundlephobia-badge]][bundlephobia] | 1.93 KB | ~39 ms | | [rechart][recharts-github] (_v1.8.5_) | [![Bundle size: Recharts][recharts-bundlephobia-badge]][recharts-bundlephobia] | 96.9 KB | ~1900 ms | | [victory-pie][victory-pie-github] (_v34.1.3_) | [![Bundle size: Victory pie][victory-pie-bundlephobia-badge]][victory-pie-bundlephobia] | 50.5 KB | ~1100 ms | | [react-apexcharts][react-apexcharts-github] (_v1.3.7_) | [![Bundle size: React apec charts][react-apexcharts-bundlephobia-badge]][react-apexcharts-bundlephobia] | 114.6 KB | ~2300 ms | | [react-vis][react-vis-github] (_v1.11.7_) | [![Bundle size: React vis][react-vis-bundlephobia-badge]][react-vis-bundlephobia] | 78.3 KB | ~1600 ms | \* Benchmark carried out with [size-limit](https://github.com/ai/size-limit) with a "real-world" setup: see [benchmark repo](https://github.com/toomuchdesign/react-pie-charts-size). (What matter here are not absolute values but the relation between magnitudes) ## Features - **< 2kB** gzipped - Versatile: **Pie**, **Donut**, **Loading**, **Completion** charts (see [Demo][storybook]) - Customizable chart **labels** and **CSS animations** - Written in **Typescript** - No dependencies ## Installation ```console 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 ```js import { PieChart } from 'react-minimal-pie-chart'; ; ``` ## Options | Property | Type | Description | Default | | --------------------- | ------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------- | | [**data**][data-props-docs] | `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][svg-css])*. | - | | **segmentsTabIndex** | `number` | [`tabindex` attribute](https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/tabindex) assigned to segments | - | | [**label**][label-props-docs] | `(labelRenderProps) => string \| number \| ReactElement` | A function returning a label value or the [SVG element][svg-elements] 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][svg-css])*. | - | | **animate** | `boolean` | Animate segments on component mount | - | | **animationDuration** | `number` | Animation duration in ms | 500 | | **animationEasing** | `string` | A [CSS easing function](https://developer.mozilla.org/en-US/docs/Web/CSS/transition-timing-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][svg-elements] (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: ```ts import type { PieChartProps } from 'react-minimal-pie-chart'; ``` ### About `data` prop `data` prop expects an array of chart entries as follows: ```typescript 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](https://reactjs.org/docs/lists-and-keys.html) - **`title`**: [`title` element](https://developer.mozilla.org/en-US/docs/Web/SVG/Element/title) 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: ```js number | string | React.ReactElement | undefined | null } /> ``` The function receives `labelRenderProps` object as single **argument**: ```typescript 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: ```js label={({ dataEntry }) => dataEntry.value} ``` Render segment's percentage as labels: ```js label={({ dataEntry }) => `${Math.round(dataEntry.percentage)} %`} ``` See examples in the [demo source][demo-label-source]. ## How to ### User interactions with the chart See [demo][demo-interaction] and relative source [here][demo-interaction-source] and [here][demo-interaction-2-source]. ### Custom tooltip See [demo][demo-tooltip] and [relative source][demo-tooltip-source]. ## Browsers support Here is an updated [browsers support list 🔍](https://github.com/toomuchdesign/react-minimal-pie-chart/issues/129). The main requirement of this library is an accurate rendering of [SVG Stroke properties](https://www.w3schools.com/graphics/svg_stroking.asp). Please consider that [`Math.sign`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign) and [`Object.assign`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/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](https://css-tricks.com/svg-line-animation-works/). ## 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](https://github.com/kentcdodds/all-contributors#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} 💻

[ci-badge]: https://github.com/toomuchdesign/react-minimal-pie-chart/actions/workflows/ci.yml/badge.svg [ci]: https://github.com/toomuchdesign/react-minimal-pie-chart/actions/workflows/ci.yml [coveralls-badge]: https://coveralls.io/repos/github/toomuchdesign/react-minimal-pie-chart/badge.svg?branch=master [coveralls]: https://coveralls.io/github/toomuchdesign/react-minimal-pie-chart?branch=master [npm]: https://www.npmjs.com/package/react-minimal-pie-chart [npm-version-badge]: https://img.shields.io/npm/v/react-minimal-pie-chart.svg [bundlephobia-badge]: https://badgen.net/bundlephobia/minzip/react-minimal-pie-chart [bundlephobia]: https://bundlephobia.com/result?p=react-minimal-pie-chart [recharts-bundlephobia-badge]: https://badgen.net/bundlephobia/minzip/recharts [recharts-bundlephobia]: https://bundlephobia.com/result?p=recharts [recharts-github]: https://github.com/recharts/recharts [victory-pie-bundlephobia-badge]: https://badgen.net/bundlephobia/minzip/victory-pie [victory-pie-bundlephobia]: https://bundlephobia.com/result?p=victory-pie [victory-pie-github]: https://github.com/FormidableLabs/victory [react-apexcharts-bundlephobia-badge]: https://badgen.net/bundlephobia/minzip/apexcharts [react-apexcharts-bundlephobia]: https://bundlephobia.com/result?p=apexcharts [react-apexcharts-github]: https://github.com/apexcharts/apexcharts.js [react-vis-bundlephobia-badge]: https://badgen.net/bundlephobia/minzip/react-vis [react-vis-bundlephobia]: https://bundlephobia.com/result?p=react-vis [react-vis-github]: https://github.com/uber/react-vis [storybook]: https://toomuchdesign.github.io/react-minimal-pie-chart/index.html [demo-interaction]: https://toomuchdesign.github.io/react-minimal-pie-chart/index.html?path=/story/interaction--click-mouseover-mouseout-callbacks [demo-interaction-source]: https://github.com/toomuchdesign/react-minimal-pie-chart/blob/v8.0.0/stories/InteractionStory.tsx [demo-interaction-2-source]: https://github.com/toomuchdesign/react-minimal-pie-chart/blob/v8.0.0/stories/InteractionTabStory.tsx [demo-tooltip]: https://toomuchdesign.github.io/react-minimal-pie-chart/index.html?path=/story/misc--tooltip-integration [demo-tooltip-source]: https://github.com/toomuchdesign/react-minimal-pie-chart/blob/master/stories/Tooltip.tsx [demo-label-source]: https://github.com/toomuchdesign/react-minimal-pie-chart/blob/v8.2.0/stories/index.tsx#L81 [data-props-docs]: #about-data-prop [label-props-docs]: #custom-labels-with-label-render-prop [svg-elements]: https://developer.mozilla.org/en-US/docs/Web/SVG/Element [svg-css]: https://css-tricks.com/svg-properties-and-css/#aa-properties-shared-between-css-and-svg

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