Range Area Chart in Angular Charts

Range Area

Range area chart displays the area between two data values (a high and a low) for each point, forming a shaded band.

Range Area chart showing data trends over time

To render a 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 RangeArea in your chart configuration. This indicates that the data should be represented as a range area chart, which is ideal for visualizing a range of values for each data point. This type of chart is particularly useful for displaying data that has a range between a minimum and maximum value, such as temperature ranges, stock price ranges, or any other type of data that varies within a specific interval.

  2. Register the RangeAreaSeriesService provider: Register RangeAreaSeriesService (along with any other chart services you need) in the component’s providers array.

  3. Provide high and low values: The RangeArea series requires two value fields for each data point. Set high to the field name representing the upper bound and low to the field name for the lower bound. Together with xName these define the band rendered at each point on the chart.

import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [ RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' 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 = chartData;
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Binding data with series

Bind data via the dataSource property on the series. Map the fields from your records to xName, high, and low so the chart knows which value drives each bound.

import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [ RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' 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 = chartData;
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Series customization

The following properties customize the range area series.

Solid fill

The fill property determines the color applied to the series. Default value is null.

import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' name='India' fill='#69D2E7'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public border?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = chartData;
        this.border = {
            width: 2,
            color: 'blue'
        }
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Gradient fill

The fill property can apply an SVG gradient to a range area series. Define the gradient within an SVG <defs> element using a unique ID, and assign it to the series in the url(#gradientId) format. Place the following SVG element in your application’s index.html file, inside the <body> element and outside the <app-container> element.

<svg>
    <defs>
        <linearGradient id="gradient">
            <stop offset="0%" style="stop-color:blue;stop-opacity:5" />
            <stop offset="50%" style="stop-color:violet;stop-opacity:5" />
        </linearGradient>
    </defs>
</svg>
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [ RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' name='India' fill='url(#gradient)'></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 = chartData;
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Opacity

The opacity property specifies the transparency level of the fill. Valid range is 0 (completely transparent) to 1 (completely opaque). Default value is 1.

import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' 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 = chartData;
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Series Border

Use the border property of the series to style its border. The border object supports these fields:

  • width - Border thickness in pixels.
  • color - Border stroke color.
  • dashArray - Dash pattern for the border (for example '5,5').
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' name='India' [border]='border'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public border?: Object;
    public chartData?: Object[];
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        this.chartData = chartData;
        this.border = {
            width: 2,
            color: 'blue',
            dashArray: '5,5'
        }
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature'
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Empty points

Data points with null or undefined values are considered empty. How an empty point is rendered on the chart depends on the mode you choose.

Mode

Use the mode property to define how empty or missing data points are handled. Available values are:

  • Gap (default) - Leaves a gap at the empty point.
  • Drop - Drops the empty point and connects adjacent points.
  • Zero - Replaces the empty point with the value 0.
  • Average - Replaces the empty point with the average of adjacent points.
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' 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 emptyPointSettings?: Object;
    ngOnInit(): void {
        this.chartData = chartData;
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature';
        this. emptyPointSettings= {
            mode: 'Zero'
        }
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
    { x: 'Jan', high: 14, low: 4 },
    { x: 'Feb', high: 17, low: 7 },
    { x: 'Mar', high: 20, low: 10 },
    { x: 'Apr', high: null, low: 12 },
    { x: 'May', high: 20, low: 10 },
    { x: 'Jun', high: 17, low: 7 },
    { x: 'Jul', high: 15, low: 5 },
    { x: 'Aug', high: 17, low: 7 },
    { x: 'Sep', high: 20, low: undefined },
    { x: 'Oct', high: 22, low: 12 },
    { x: 'Nov', high: 20, low: 10 },
    { x: 'Dec', high: 17, low: 7 }
];

Empty Point Fill

Use the fill property to customize the fill color of empty points in the series. Applies only when mode is Zero or Average.

import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' name='India' [emptyPointSettings]='emptyPointSettings' [marker]='marker'></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 emptyPointSettings?: Object;
    public marker?: Object;
    ngOnInit(): void {
        this.chartData = chartData;
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.marker = {visible: true};
        this.title = 'Maximum and Minimum Temperature';
        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 chartData: Object[] = [
    { x: 'Jan', high: 14, low: 4 },
    { x: 'Feb', high: 17, low: 7 },
    { x: 'Mar', high: 20, low: 10 },
    { x: 'Apr', high: null, low: 12 },
    { x: 'May', high: 20, low: 10 },
    { x: 'Jun', high: 17, low: 7 },
    { x: 'Jul', high: 15, low: 5 },
    { x: 'Aug', high: 17, low: 7 },
    { x: 'Sep', high: 20, low: undefined },
    { x: 'Oct', high: 22, low: 12 },
    { x: 'Nov', high: 20, low: 10 },
    { x: 'Dec', high: 17, low: 7 }
];

Empty Point Border

Use the border property to customize the width and color of the border for empty points. Applies only when mode is Zero or Average.

import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' name='India' [emptyPointSettings]='emptyPointSettings' [marker]='marker'></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 emptyPointSettings?: Object;
    public marker?: object;
    ngOnInit(): void {
        this.chartData = chartData;
        this.marker = {visible: true};
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature';
        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 chartData: Object[] = [
    { x: 'Jan', high: 14, low: 4 },
    { x: 'Feb', high: 17, low: 7 },
    { x: 'Mar', high: 20, low: 10 },
    { x: 'Apr', high: null, low: 12 },
    { x: 'May', high: 20, low: 10 },
    { x: 'Jun', high: 17, low: 7 },
    { x: 'Jul', high: 15, low: 5 },
    { x: 'Aug', high: 17, low: 7 },
    { x: 'Sep', high: 20, low: undefined },
    { x: 'Oct', high: 22, low: 12 },
    { x: 'Nov', high: 20, low: 10 },
    { x: 'Dec', high: 17, low: 7 }
];

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 { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { ISeriesRenderEventArgs } from '@syncfusion/ej2-charts'
import { RangeAreaSeriesService, CategoryService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [RangeAreaSeriesService, CategoryService],
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='RangeArea' xName='x' high='high' low='low' 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 = chartData;
        this.primaryXAxis = {
           title: 'Month',valueType: 'Category',
           edgeLabelPlacement: 'Shift'
        };
        this.primaryYAxis = {
            title: 'Temperature(Celsius)',
            minimum: 0, maximum: 20
        };
        this.title = 'Maximum and Minimum Temperature';
    }
    public seriesRender(args: ISeriesRenderEventArgs) {
        args.fill = '#ff6347';
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Point render

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

import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts';
import { IPointRenderEventArgs } from '@syncfusion/ej2-charts';
import {
  RangeAreaSeriesService,
  CategoryService,
} from '@syncfusion/ej2-angular-charts';

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

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

  providers: [RangeAreaSeriesService, CategoryService],
  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='RangeArea' xName='x' high='high' low='low' name='India' [marker]='marker'></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 = chartData;
    this.primaryXAxis = {
      title: 'Month',
      valueType: 'Category',
      edgeLabelPlacement: 'Shift',
    };
    this.primaryYAxis = {
      title: 'Temperature(Celsius)',
      minimum: 0,
      maximum: 20,
    };
    this.title = 'Maximum and Minimum Temperature';
    this.marker = { visible: true };
  }
  public pointRender(args: IPointRenderEventArgs): void {
    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 chartData: Object[] = [
        { x: 'Jan', high: 14, low: 4 },
        { x: 'Feb', high: 17, low: 7 },
        { x: 'Mar', high: 20, low: 10 },
        { x: 'Apr', high: 22, low: 12 },
        { x: 'May', high: 20, low: 10 },
        { x: 'Jun', high: 17, low: 7 },
        { x: 'Jul', high: 15, low: 5 },
        { x: 'Aug', high: 17, low: 7 },
        { x: 'Sep', high: 20, low: 10 },
        { x: 'Oct', high: 22, low: 12 },
        { x: 'Nov', high: 20, low: 10 },
        { x: 'Dec', high: 17, low: 7 }
    ];

Troubleshooting

  • Ensure RangeAreaSeriesService is registered in the providers; otherwise the range area series will not render.
  • Gradient fill renders as solid color: the SVG gradient referenced by fill='url(#gradient)' is not defined. Add a matching <linearGradient> (or <radialGradient>) inside a <defs> block in the chart template, or in a global stylesheet.
  • Empty-point customization has no visible effect: the fill and border settings on emptyPointSettings apply only when mode is Zero or Average. With Gap and Drop modes no marker is drawn.

See Also