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React Native Chart Kit Documentation
Import components
yarn add react-native-chart-kityarn add react-native-svg prop-typesinstall peer dependencies- Use with ES6 syntax to import components
import {
LineChart,
BarChart,
PieChart,
ProgressChart,
ContributionGraph,
StackedBarChart
} from "react-native-chart-kit";
Quick Example
<View>
<Text>Bezier Line Chart</Text>
<LineChart
data={{
labels: ["January", "February", "March", "April", "May", "June"],
datasets: [
{
data: [
Math.random() * 100,
Math.random() * 100,
Math.random() * 100,
Math.random() * 100,
Math.random() * 100,
Math.random() * 100
]
}
]
}}
width={Dimensions.get("window").width} // from react-native
height={220}
yAxisLabel="$"
yAxisSuffix="k"
chartConfig={{
backgroundColor: "#e26a00",
backgroundGradientFrom: "#fb8c00",
backgroundGradientTo: "#ffa726",
decimalPlaces: 2, // optional, defaults to 2dp
color: (opacity = 1) => `rgba(255, 255, 255, ${opacity})`,
labelColor: (opacity = 1) => `rgba(255, 255, 255, ${opacity})`,
style: {
borderRadius: 16
},
propsForDots: {
r: "6",
strokeWidth: "2",
stroke: "#ffa726"
}
}}
bezier
style={{
marginVertical: 8,
borderRadius: 16
}}
/>
</View>
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
};
```, Property, Type, Description, -----------------------------, ------------------, ------------------------------------------------------------------------------------------------------, backgroundGradientFrom, string, Defines the first color in the linear gradient of a chart's background, backgroundGradientFromOpacity, Number, Defines the first color opacity in the linear gradient of a chart's background, backgroundGradientTo, string, Defines the second color in the linear gradient of a chart's background, backgroundGradientToOpacity, Number, Defines the second color opacity in the linear gradient of a chart's background, fillShadowGradient, string, Defines the color of the area under data, fillShadowGradientOpacity, Number, Defines the initial opacity of the area under data, color, function => string, Defines the base color function that is used to calculate colors of labels and sectors used in a chart, strokeWidth, Number, Defines the base stroke width in a chart, barPercentage, Number, Defines the percent (0-1) of the available width each bar width in a chart, barRadius, Number, Defines the radius of each bar, propsForBackgroundLines, props, Override styles of the background lines, refer to react-native-svg's Line documentation, propsForLabels, props, Override styles of the labels, refer to react-native-svg's Text documentation, ## Responsive charts
To render a responsive chart, use `Dimensions` react-native library to get the width of the screen of your device like such
```js
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", "Sunny Days", "Snowy Days"] // optional
};
<LineChart
data={data}
width={screenWidth}
height={220}
chartConfig={chartConfig}
/>
```, Property, Type, Description, -----------------------, -----------------------, ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------, data, Object, Data for the chart - see example above, width, Number, Width of the chart, use 'Dimensions' library to get the width of your screen for responsive, height, Number, Height of the chart, withDots, boolean, Show dots on the line - default: True, withShadow, boolean, Show shadow for line - default: True, withInnerLines, boolean, Show inner dashed lines - default: True, withOuterLines, boolean, Show outer dashed lines - default: True, withVerticalLabels, boolean, Show vertical labels - default: True, withHorizontalLabels, boolean, Show horizontal labels - default: True, fromZero, boolean, Render charts from 0 not from the minimum value. - default: False, yAxisLabel, string, Prepend text to horizontal labels -- default: '', yAxisSuffix, string, Append text to horizontal labels -- default: '', xAxisLabel, string, Prepend text to vertical labels -- default: '', chartConfig, Object, Configuration object for the chart, see example config object above, decorator, Function, This function takes a [whole bunch](https://github.com/indiespirit/react-native-chart-kit/blob/master/src/line-chart/line-chart.js#L292) of stuff and can render extra elements, such as data point info or additional markup., onDataPointClick, Function, Callback that takes `{value, dataset, getColor}`, horizontalLabelRotation, number (degree), Rotation angle of the horizontal labels - default 0, verticalLabelRotation, number (degree), Rotation angle of the vertical labels - default 0, getDotColor, function => string, Defines the dot color function that is used to calculate colors of dots in a line chart and takes `(dataPoint, dataPointIndex)`, renderDotContent, Function, Render additional content for the dot. Takes `({x, y, index})` as arguments., yLabelsOffset, number, Offset for Y axis labels, xLabelsOffset, number, Offset for X axis labels, hidePointsAtIndex, number[], Indices of the data points you don't want to display, formatYLabel, Function, This function change the format of the display value of the Y label. Takes the Y value as argument and should return the desirable string., formatXLabel, Function, This function change the format of the display value of the X label. Takes the X value as argument and should return the desirable string., getDotProps, (value, index) => props, This is an alternative to chartConfig's propsForDots, segments, number, The amount of horizontal lines - default 4, ## Bezier Line Chart
```jsx
<LineChart
data={data}
width={screenWidth}
height={256}
verticalLabelRotation={30}
chartConfig={chartConfig}
bezier
/>
```, Property, Type, Description, --------, -------, -----------------------------------------------------, bezier, boolean, Add this prop to make the line chart smooth and curvy, ## Progress Ring
```js
// each value represents a goal ring in Progress chart
const data = {
labels: ["Swim", "Bike", "Run"], // optional
data: [0.4, 0.6, 0.8]
};
<ProgressChart
data={data}
width={screenWidth}
height={220}
chartConfig={chartConfig}
hideLegend={false}
/>
```, Property, Type, Description, -----------, -------, -------------------------------------------------------------------------------------------, data, Object, Data for the chart - see example above, width, Number, Width of the chart, use 'Dimensions' library to get the width of your screen for responsive, height, Number, Height of the chart, chartConfig, Object, Configuration object for the chart, see example config in the beginning of this file, hideLegend, Boolean, Switch to hide chart legend (defaults to false), ## Bar chart
```js
const data = {
labels: ["January", "February", "March", "April", "May", "June"],
datasets: [
{
data: [20, 45, 28, 80, 99, 43]
}
]
};
<BarChart
style={graphStyle}
data={data}
width={screenWidth}
height={220}
yAxisLabel="$"
chartConfig={chartConfig}
verticalLabelRotation={30}
/>
```, Property, Type, Description, -----------------------, ---------------, -------------------------------------------------------------------------------------------, data, Object, Data for the chart - see example above, width, Number, Width of the chart, use 'Dimensions' library to get the width of your screen for responsive, height, Number, Height of the chart, withVerticalLabels, boolean, Show vertical labels - default: True, withHorizontalLabels, boolean, Show horizontal labels - default: True, fromZero, boolean, Render charts from 0 not from the minimum value. - default: False, withInnerLines, boolean, Show inner dashed lines - default: True, yAxisLabel, string, Prepend text to horizontal labels -- default: '', yAxisSuffix, string, Append text to horizontal labels -- default: '', chartConfig, Object, Configuration object for the chart, see example config in the beginning of this file, horizontalLabelRotation, number (degree), Rotation angle of the horizontal labels - default 0, verticalLabelRotation, number (degree), Rotation angle of the vertical labels - default 0, showBarTops, boolean, Show bar tops, ## StackedBar chart
```js
const data = {
labels: ["Test1", "Test2"],
legend: ["L1", "L2", "L3"],
data: [[60, 60, 60], [30, 30, 60]],
barColors: ["#dfe4ea", "#ced6e0", "#a4b0be"]
};
<StackedBarChart
style={graphStyle}
data={data}
width={screenWidth}
height={220}
chartConfig={chartConfig}
/>
```, Property, Type, Description, --------------------, -------, -------------------------------------------------------------------------------------------, data, Object, Data for the chart - see example above, width, Number, Width of the chart, use 'Dimensions' library to get the width of your screen for responsive, height, Number, Height of the chart, withVerticalLabels, boolean, Show vertical labels - default: True, withHorizontalLabels, boolean, Show horizontal labels - default: True, chartConfig, Object, Configuration object for the chart, see example config in the beginning of this file, barPercentage, Number, Defines the percent (0-1) of the available width each bar width in a chart, showLegend, boolean, Show legend - default: True, ## Pie chart
### Modified Pie Chart Screenshot
```js
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
}
];
<PieChart
data={data}
width={screenWidth}
height={220}
chartConfig={chartConfig}
accessor="population"
backgroundColor="transparent"
paddingLeft="15"
absolute
/>
```, Property, Type, Description, -----------, -------, -------------------------------------------------------------------------------------------, data, Object, Data for the chart - see example above, width, Number, Width of the chart, use 'Dimensions' library to get the width of your screen for responsive, height, Number, Height of the chart, chartConfig, Object, Configuration object for the chart, see example config in the beginning of this file, accessor, string, Property in the `data` object from which the number values are taken, bgColor, string, background color - if you want to set transparent, input `transparent` or `none`., paddingLeft, string, left padding of the pie chart, absolute, boolean, shows the values as absolute numbers, hasLegend, boolean, Defaults to `true`, set it to `false` to remove the legend, ## 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.
```js
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 }
];
<ContributionGraph
values={commitsData}
endDate={new Date("2017-04-01")}
numDays={105}
width={screenWidth}
height={220}
chartConfig={chartConfig}
/>
```, Property, Type, Description, -----------, ------, -------------------------------------------------------------------------------------------, data, Object, Data for the chart - see example above, width, Number, Width of the chart, use 'Dimensions' library to get the width of your screen for responsive, height, Number, Height of the chart, chartConfig, Object, Configuration object for the chart, see example config in the beginning of this file, accessor, string, Property in the `data` object from which the number values are taken, ## 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:
```js
{
// 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,
}
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!