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📲See example app

To try the examples in Expo, please change main to ./node_modules/expo/AppEntry.js in package.json before starting things with expo run. You'll need to have expo-cli installed via npm install -g expo-cli.

React Native Chart Kit Documentation

Import components

1. yarn add react-native-chart-kit
2. yarn add react-native-svg install peer dependencies
3. Use with ES6 syntax to import components

import {
  LineChart,
  BarChart,
  PieChart,
  ProgressChart,
  ContributionGraph,
  StackedBarChart
} from "react-native-chart-kit";

Quick Example

Chart style object

Define a chart style object with following properies as such:

const chartConfig = {
  backgroundGradientFrom: "#1E2923",
  backgroundGradientFromOpacity: 0,
  backgroundGradientTo: "#08130D",
  backgroundGradientToOpacity: 0.5,
  color: (opacity = 1) => `rgba(26, 255, 146, ${opacity})`,
  strokeWidth: 2, // optional, default 3
  barPercentage: 0.5,
  useShadowColorFromDataset: false // optional
};

Responsive charts

To render a responsive chart, use Dimensions react-native library to get the width of the screen of your device like such

import { Dimensions } from "react-native";
const screenWidth = Dimensions.get("window").width;

Line Chart

const data = {
  labels: ["January", "February", "March", "April", "May", "June"],
  datasets: [
    {
      data: [20, 45, 28, 80, 99, 43],
      color: (opacity = 1) => `rgba(134, 65, 244, ${opacity})`, // optional
      strokeWidth: 2 // optional
    }
  ],
  legend: ["Rainy Days"] // optional
};

Bezier Line Chart

Progress Ring

// each value represents a goal ring in Progress chart
const data = {
  labels: ["Swim", "Bike", "Run"], // optional
  data: [0.4, 0.6, 0.8]
};

Bar chart

const data = {
  labels: ["January", "February", "March", "April", "May", "June"],
  datasets: [
    {
      data: [20, 45, 28, 80, 99, 43]
    }
  ]
};

StackedBar chart

const data = {
  labels: ["Test1", "Test2"],
  legend: ["L1", "L2", "L3"],
  data: [
    [60, 60, 60],
    [30, 30, 60]
  ],
  barColors: ["#dfe4ea", "#ced6e0", "#a4b0be"]
};

Pie chart

Modified Pie Chart Screenshot

const data = [
  {
    name: "Seoul",
    population: 21500000,
    color: "rgba(131, 167, 234, 1)",
    legendFontColor: "#7F7F7F",
    legendFontSize: 15
  },
  {
    name: "Toronto",
    population: 2800000,
    color: "#F00",
    legendFontColor: "#7F7F7F",
    legendFontSize: 15
  },
  {
    name: "Beijing",
    population: 527612,
    color: "red",
    legendFontColor: "#7F7F7F",
    legendFontSize: 15
  },
  {
    name: "New York",
    population: 8538000,
    color: "#ffffff",
    legendFontColor: "#7F7F7F",
    legendFontSize: 15
  },
  {
    name: "Moscow",
    population: 11920000,
    color: "rgb(0, 0, 255)",
    legendFontColor: "#7F7F7F",
    legendFontSize: 15
  }
];

Contribution graph (heatmap)

This type of graph is often use to display a developer contribution activity. However, there many other use cases this graph is used when you need to visualize a frequency of a certain event over time.

const commitsData = [
  { date: "2017-01-02", count: 1 },
  { date: "2017-01-03", count: 2 },
  { date: "2017-01-04", count: 3 },
  { date: "2017-01-05", count: 4 },
  { date: "2017-01-06", count: 5 },
  { date: "2017-01-30", count: 2 },
  { date: "2017-01-31", count: 3 },
  { date: "2017-03-01", count: 2 },
  { date: "2017-04-02", count: 4 },
  { date: "2017-03-05", count: 2 },
  { date: "2017-02-30", count: 4 }
];

More styling

Every charts also accepts style props, which will be applied to parent svg or View component of each chart.

Abstract Chart

src/abstract-chart.js is an extendable class which can be used to create your own charts!

The following methods are available:

renderHorizontalLines(config)

Renders background horizontal lines like in the Line Chart and Bar Chart. Takes a config object with following properties:

{
  // width of your chart
  width: Number,
  // height of your chart
  height: Number,
  // how many lines to render
  count: Number,
  // top padding from the chart top edge
  paddingTop: Number
}

renderVerticalLabels(config)

Render background vertical lines. Takes a config object with following properties:

{
  // data needed to calculate the number of lines to render
  data: Array,
  // width of your chart
  width: Number,
  // height of your chart
  height: Number,
  paddingTop: Number,
  paddingRight: Number
}

renderDefs(config)

Render definitions of background and shadow gradients

{
  // width of your chart
  width: Number,
  // height of your chart
  height: Number,
  // first color of background gradient
  backgroundGradientFrom: String,
  // first color opacity of background gradient (0 - 1.0)
  backgroundGradientFromOpacity: Number,
  // second color of background gradient
  backgroundGradientTo: String,
  // second color opacity of background gradient (0 - 1.0)
  backgroundGradientToOpacity: Number,
}

Compilation

For production use, the package is automatically compiled after installation, so that you can just install it with npm and use it out-of-the-box.

To transpile TypeScript into JavaScript for development purposes, you can use either run npm run build to compile once, or npm run dev to start compilation in watch mode, which will recompile the files on change.

More information

This library is built on top of the following open-source projects:

• react-native-svg (https://github.com/react-native-community/react-native-svg)
• paths-js (https://github.com/andreaferretti/paths-js)
• react-native-calendar-heatmap (https://github.com/ayooby/react-native-calendar-heatmap)

Contribute

See the contribution guide and join the contributors!