Spline Chart in EJ2 TypeScript control

13 Dec 202424 minutes to read

Spline

To render a spline 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:

Set the series type: Define the series type as Spline in your chart configuration. This indicates that the series should be represented as a smooth curve, connecting data points with a spline rather than straight lines.
Inject the SplineSeries module: Use the Chart.Inject(SplineSeries) method to inject the SplineSeries module into your chart. This step is essential, as it ensures that the necessary functionalities for rendering spline series are available in your chart.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        //Series type as spline
        type: 'Spline'
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline'
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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 }
];

Spline type

Use the splineType to define the type of the spline series. The default type is Natural, which creates a smooth curve through the data points.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        splineType: 'Cardinal'
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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 series.

Fill

The fill property determines the color applied to the series.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        fill: 'blue'
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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 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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        fill: 'url(#gradient)'
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
    <svg style="width:1px; height:1px">
        <defs>
            <linearGradient id="gradient">
                <stop offset="0%" style="stop-color:#FF0000;stop-opacity:5" />
                <stop offset="70%" style="stop-color:#00FF00;stop-opacity:5" />
            </linearGradient>
        </defs>
    </svg>
</body>

</html>
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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        opacity: 0.5
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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 }
];

Dash array

The dashArray property determines the pattern of dashes and gaps in the series.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        dashArray: '5,5'
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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 }
];

Width

The width property specifies the stroke width applied to the series.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        width: 4
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        width: 2,
        emptyPointSettings: {
            mode: 'Average'
        }
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        width: 2,
        marker: { visible: true, width: 7, height: 7, isFilled: true },
        emptyPointSettings: {
            mode: 'Zero',
            fill: '#FF8C00'
        }
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        type: 'Spline',
        width: 2,
        marker: { visible: true, width: 7, height: 7, isFilled: true },
        emptyPointSettings: {
            mode: 'Zero',
            fill: '#FF8C00',
            border: { width: 2, color: '#000080'}
        }
    }],
    title: 'Climate Graph-2012'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category, ISeriesRenderEventArgs } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        //Series type as spline
        type: 'Spline'
    }],
    title: 'Climate Graph-2012',
    seriesRender: (args: ISeriesRenderEventArgs) => {
        args.fill = '#ff6347';
    }
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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.

index.ts
index.html
datasource.ts
import { Chart, SplineSeries, Category, IPointRenderEventArgs } from '@syncfusion/ej2-charts';
import { splineData } from './datasource.ts';
Chart.Inject(SplineSeries, Category);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
    },
    primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
    },
    series:[{
        dataSource: splineData,
        xName: 'x', yName: 'y',
        //Series type as spline
        type: 'Spline',
        marker: { visible: true }
    }],
    title: 'Climate Graph-2012',
    pointRender: (args: IPointRenderEventArgs) => {
        if (args.point.index % 2 !== 0) {
            args.fill = '#ff6347';
        }
        else {
            args.fill = '#009cb8';
        }
    }
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
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 }
];