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Spline Range Area in Angular Charts

3 Feb 202624 minutes to read

Spline Range Area

To render a spline range 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 SplineRangeArea in your chart configuration. This indicates that the data should be represented as a spline range area chart, which is ideal for visualizing continuous data points as a set of splines that vary between high and low values over intervals of time and across different categories.

  2. Inject the SplineRangeAreaSeries module: Use the @NgModule.providers method to inject the SplineRangeAreaSeriesService module into your chart. This step is essential, as it ensures that the necessary functionalities for rendering spline range area series are available in your chart.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.title = 'Monthly Temperature Range'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
        { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
        { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Apr', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
        { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Sep', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
    ];

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, high, and low properties.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.title = 'Monthly Temperature Range'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
        { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
        { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Apr', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
        { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Sep', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
    ];

Series customization

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

Fill

The fill property determines the color applied to the series.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England' fill='red'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India' fill='blue'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.title = 'Monthly Temperature Range'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
        { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
        { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Apr', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
        { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Sep', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
    ];

Opacity

The opacity property controls the transparency of the fill and affects how the series blends with background or overlapping series.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England' opacity='0.5'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India' opacity='0.5'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.title = 'Monthly Temperature Range'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
        { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
        { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Apr', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
        { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Sep', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
    ];

Border

Use the border property to configure the border width, color, and dasharray of the spline range area series.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England' [border]='border'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India' [border]='border'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public border?: Object;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.border = {width:2, color: 'red', dashArray: '5,5'};
        this.title = 'Monthly Temperature Range'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
        { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
        { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Apr', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
        { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Sep', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
    ];

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 control handling of empty points. Available modes: Gap, Drop, Zero, Average. The default mode is Gap.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England' [emptyPointSettings]='emptyPointSettings'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India' [emptyPointSettings]='emptyPointSettings'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings1?: Object;
    public emptyPointSettings?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.title = 'Monthly Temperature Range'
        this.emptyPointSettings = {
            mode: 'Gap'
        }
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
    { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
    { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Apr', high: null, low: 12, high1: 37, low1: 27 },
    { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
    { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Sep', high: 20, low: 10, high1: undefined, low1: 25 },
    { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
    { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
];

Fill

Use the fill property to set the fill color for empty points.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England' [marker]='marker' [emptyPointSettings]='emptyPointSettings'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India' [marker]='marker' [emptyPointSettings]='emptyPointSettings'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public marker?: Object;
    public primaryYAxis?: Object;
    public emptyPointSettings1?: Object;
    public emptyPointSettings?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.marker= { visible: true};
        this.title = 'Monthly Temperature Range'
        this.emptyPointSettings = {
            mode: 'Average', fill: 'red'
        }
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
    { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
    { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Apr', high: null, low: 12, high1: 37, low1: 27 },
    { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
    { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Sep', high: 20, low: 10, high1: undefined, low1: 25 },
    { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
    { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
];

Border

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

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England' [marker]='marker' [emptyPointSettings]='emptyPointSettings'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India' [marker]='marker' [emptyPointSettings]='emptyPointSettings'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    public marker?: Object;
    public emptyPointSettings1?: Object;
    public emptyPointSettings?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.marker = {visible: true};
        this.title = 'Monthly Temperature Range'
        this.emptyPointSettings = {
            mode: 'Average', fill: 'red', border: { width: 2, color: 'green' }
        }
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
    { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
    { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Apr', high: null, low: 12, high1: 37, low1: 27 },
    { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
    { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
    { x: 'Sep', high: 20, low: 10, high1: undefined, low1: 25 },
    { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
    { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
    { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
];

Events

Series render

The seriesRender event enables modification of series properties (for example, data, fill, or name) immediately before rendering. Use this event to adjust series appearance or to dynamically swap data sources.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { ISeriesRenderEventArgs } from '@syncfusion/ej2-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" (seriesRender)='seriesRender($event)' [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high' low='low' name='England'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' high='high1' low='low1' name='India'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.title = 'Monthly Temperature Range'
    }
    public seriesRender(args: ISeriesRenderEventArgs) {
        if (args.series.index === 0) {
            args.fill = '#ff4251';
        }
        else if (args.series.index === 1) {
            args.fill = '#4C4C4C';
        }
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
        { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
        { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Apr', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
        { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Sep', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
    ];

Point render

The pointRender event provides a hook to customize each data point (for example, marker shape, border, or fill) before it is drawn. Use this to apply per-point styling rules or conditional formatting.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { IPointRenderEventArgs } from '@syncfusion/ej2-charts'
import { AreaSeriesService, RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';
import { splinedata } from './datasource';

@Component({
imports: [
         ChartModule, ChartAllModule
    ],

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService,
               DateTimeService, CategoryService, MultiColoredAreaSeriesService,StackingStepAreaSeriesService,SplineRangeAreaSeriesService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" (pointRender)='pointRender($event)' [primaryXAxis]='primaryXAxis'[primaryYAxis]='primaryYAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' [marker]='marker' high='high' low='low' name='England'></e-series>
            <e-series [dataSource]='chartData' type='SplineRangeArea' xName='x' [marker]='marker' high='high1' low='low1' name='India'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    public marker?: Object;
    ngOnInit(): void {
        this.chartData = splinedata;
        this.primaryXAxis = {
           valueType: 'Category',
            edgeLabelPlacement: 'Shift',
            majorGridLines: { width: 0 }
        };
        this.primaryYAxis = {
            labelFormat: '{value}˚C',
            lineStyle: { width: 0 },
            minimum: 0,
            maximum: 40,
            majorTickLines: { width: 0 }
        };
        this.marker = {visible: true};
        this.title = 'Monthly Temperature Range'
    }
    public pointRender(args: IPointRenderEventArgs) {
        if (args.point.index % 2 !== 0) {
            args.fill = '#ff6347';
        }
        else {
            args.fill = '#009cb8';
        }
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let splinedata: Object[] = [
        { x: 'Jan', high: 14, low: 4,  high1: 29, low1: 19 },
        { x: 'Feb', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Mar', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Apr', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'May', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Jun', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Jul', high: 15, low: 5,  high1: 30, low1: 20 },
        { x: 'Aug', high: 17, low: 7,  high1: 32, low1: 22 },
        { x: 'Sep', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Oct', high: 22, low: 12, high1: 37, low1: 27 },
        { x: 'Nov', high: 20, low: 10, high1: 35, low1: 25 },
        { x: 'Dec', high: 17, low: 7,  high1: 32, low1: 22 }
    ];

See Also