Step Area in React Chart component

14 Dec 202424 minutes to read

Spline Area

To render a spline area series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

  1. Set the series type: Define the series type as SplineArea in your chart configuration. This indicates that the data should be represented as a spline area chart, where data points are connected by smooth, curved lines (splines) instead of straight lines.

  2. Inject the SplineAreaSeries module: Inject SplineAreaSeries module into the services. This step is essential, as it ensures that the necessary functionalities for rendering spline area series are available in your chart.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' width={2} name='London' type='SplineArea' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };

  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' width={2} name='London' type='SplineArea'
          marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Binding data with series

You can bind data to the chart using the dataSource property within the series configuration. This allows you to connect a JSON dataset or remote data to your chart. To display the data correctly, map the fields from the data to the chart series xName and yName properties.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' width={2} name='London' type='SplineArea' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };

  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' width={2} name='London' type='SplineArea'
          marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Series customization

The following properties can be used to customize the spline area series.

Fill

The fill property determines the color applied to the series.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' fill='yellow' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };

  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' fill='yellow' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

The fill property can be used to apply a gradient color to the spline area series. By configuring this property with gradient values, you can create a visually appealing effect in which the color transitions smoothly from one shade to another.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' fill='url(#gradient)' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };

  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' fill='url(#gradient)' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Opacity

The opacity property specifies the transparency level of the fill. Adjusting this property allows you to control how opaque or transparent the fill color of the series appears.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' opacity={0.5} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };

  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' opacity={0.5} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Border

Use the border property to customize the width, color and dasharray of the series border.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Category } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis = {
    title: 'Month',
    valueType: 'Category'
  };
  const primaryyAxis = {
    minimum: -5,
    maximum: 30,
    interval: 5,
    title: 'Temperature in Celsius',
    labelFormat: '{value}°C'
  };
  const border = { width: 2, color: '#FFA500', dashArray: '5,5' };
  return <ChartComponent id='charts'
    primaryXAxis={primaryxAxis}
    primaryYAxis={primaryyAxis}
    title='Climate Graph-2012'>
    <Inject services={[SplineAreaSeries, Category]} />
    <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' type='SplineArea' border={border}>
      </SeriesDirective>
    </SeriesCollectionDirective>
  </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, AxisModel, BorderModel, SplineAreaSeries, Category } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = {
    title: 'Month',
    valueType: 'Category'
  };
  const primaryyAxis: AxisModel = {
    minimum: -5,
    maximum: 30,
    interval: 5,
    title: 'Temperature in Celsius',
    labelFormat: '{value}°C'
  };
  const border: BorderModel = { width: 2, color: '#FFA500', dashArray: '5,5' };
  return <ChartComponent id='charts'
    primaryXAxis={primaryxAxis}
    primaryYAxis={primaryyAxis}
    title='Climate Graph-2012'>
    <Inject services={[SplineAreaSeries, Category]} />
    <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' type='SplineArea' border={border}>
      </SeriesDirective>
    </SeriesCollectionDirective>
  </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Empty points

Data points with null or undefined values are considered empty. Empty data points are ignored and not plotted on the chart.

Mode

Use the mode property to define how empty or missing data points are handled in the series. The default mode for empty points is Gap.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    const emptyPoint = { mode: 'Gap' };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' emptyPointSettings={emptyPoint} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };
  const emptyPoint: object = { mode: 'Gap' };
  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' emptyPointSettings={emptyPoint} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: null }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 }, 
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: undefined }, 
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: null }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 }, 
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: undefined }, 
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Fill

Use the fill property to customize the fill color of empty points in the series.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    const emptyPoint = { mode: 'Average', fill: 'red' };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' emptyPointSettings={emptyPoint} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };
  const emptyPoint: object = { mode: 'Average', fill: 'red' };
  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' emptyPointSettings={emptyPoint} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: null }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 }, 
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: undefined }, 
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: null }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 }, 
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: undefined }, 
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Border

Use the border property to customize the width and color of the border for empty points.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    const emptyPoint = { mode: 'Average', fill: 'red', border: {width: 1.5, color: 'green'} };
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' emptyPointSettings={emptyPoint} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, Selection}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };
  const emptyPoint: object = { mode: 'Average', fill: 'red', border: {width: 1.5, color: 'green'} };
  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' emptyPointSettings={emptyPoint} marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: null }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 }, 
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: undefined }, 
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: null }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 }, 
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: undefined }, 
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Events

Series render

The seriesRender event allows you to customize series properties, such as data, fill, and name, before they are rendered on the chart.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    const seriesRender = (args) => {
      args.fill = '#ff6347';
  }
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis} seriesRender={seriesRender}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, ISeriesRenderEventArgs}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };
  const seriesRender = (args: ISeriesRenderEventArgs) => {
    args.fill = '#ff6347';
  };
  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis} seriesRender={seriesRender}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

Point render

The pointRender event allows you to customize each data point before it is rendered on the chart.

import * as React from "react";
import * as ReactDOM from "react-dom";
import { ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries, Legend, Category, Tooltip, DataLabel } from '@syncfusion/ej2-react-charts';
import { splineData } from './datasource';
function App() {
    const primaryxAxis = { title: 'Month', valueType: 'Category' };
    const pointRender = (args) => {
      if (args.point.y < 10) {
        args.fill = '#ff6347';
    }
    else {
        args.fill = '#009cb8';
    }
  }
    return <ChartComponent id='charts' primaryXAxis={primaryxAxis} pointRender={pointRender}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]}/>
      <SeriesCollectionDirective>
      <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>;
}
;
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { AxisModel, ChartComponent, SeriesCollectionDirective, SeriesDirective, Inject, SplineAreaSeries,
         Legend, Category, Tooltip, DataLabel, Zoom, Crosshair, SplineSeries, IPointRenderEventArgs}
from'@syncfusion/ej2-react-charts';
import { splineData } from './datasource';

function App() {

  const primaryxAxis: AxisModel = { title: 'Month', valueType: 'Category' };
  const pointRender = (args: IPointRenderEventArgs) => {
    if (args.point.y < 10) {
      args.fill = '#ff6347';
  }
  else {
      args.fill = '#009cb8';
  }
  };
  return <ChartComponent id='charts'
      primaryXAxis={primaryxAxis} pointRender={pointRender}>
      <Inject services={[SplineAreaSeries, Legend, Tooltip, DataLabel, Category]} />
      <SeriesCollectionDirective>
        <SeriesDirective dataSource={splineData} xName='x' yName='y' name='London' type='SplineArea' marker={{ visible: true, width: 10, height: 10 }}>
        </SeriesDirective>
      </SeriesCollectionDirective>
    </ChartComponent>

};
export default App;
ReactDOM.render(<App />, document.getElementById("charts"));
export let splineData = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];
export let splineData: Object[] = [
    { x: 'Jan', y: -1 }, 
    { x: 'Feb', y: -1 }, 
    { x: 'Mar', y: 2 },
    { x: 'Apr', y: 8 }, 
    { x: 'May', y: 13 }, 
    { x: 'Jun', y: 18 },
    { x: 'Jul', y: 21 }, 
    { x: 'Aug', y: 20 }, 
    { x: 'Sep', y: 16 },
    { x: 'Oct', y: 10 }, 
    { x: 'Nov', y: 4 }, 
    { x: 'Dec', y: 0 }
];

See Also