Stacked Area Chart in Angular Charts

28 Aug 202624 minutes to read

Stacked Area

A stacked area chart displays multiple area series stacked on top of each other to show the cumulative total.

Stack Area chart showing data trends over time

To render a stacked 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:

Set the series type: Define the series type as StackingArea in your chart configuration. This indicates that the data should be represented as a stacked area chart, which is ideal for showing the contribution of each part to a total over time or across other categorical data.
Register the StackingAreaSeriesService provider: Register StackingAreaSeriesService (along with any other chart services you need) in the component’s providers array.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
        { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
        { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
        { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
        { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
        { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
        { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
        { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
        { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
        { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
        { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
        { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
        { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
        { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
        { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
        { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
    ];

Binding data with series

Bind data via the dataSource property on the series. Map the fields from your records to xName and yName so the chart knows which value drives each point. The included basic sample renders four StackingArea series (Organic, Fair-trade, Veg Alternatives, Others) on the same dataSource, with each series pointing to a different yName (y, y1, y2, y3).

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
        { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
        { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
        { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
        { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
        { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
        { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
        { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
        { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
        { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
        { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
        { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
        { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
        { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
        { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
        { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
    ];

Series customization

The following properties customize the stacked area series.

Solid fill

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

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' fill= 'red'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' fill='yellow'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'  fill='green'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others' fill='blue'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
        { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
        { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
        { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
        { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
        { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
        { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
        { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
        { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
        { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
        { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
        { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
        { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
        { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
        { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
        { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
    ];

Gradient fill

The fill property can apply an SVG gradient to a stack 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 elements in your application’s index.html file, inside the <body> element and outside the <app-container> element.

<svg>
    <defs>
        <linearGradient id="gradient1">
            <stop offset="0%" style="stop-color:blue;stop-opacity:1" />
            <stop offset="50%" style="stop-color:violet;stop-opacity:1" />
        </linearGradient>
    </defs>
</svg>

<svg>
    <defs>
        <linearGradient id="gradient2">
            <stop offset="0%" style="stop-color:darkred;stop-opacity:1" />
            <stop offset="50%" style="stop-color:darkorange;stop-opacity:1" />
        </linearGradient>
    </defs>
</svg>

<svg>
    <defs>
        <linearGradient id="gradient3">
            <stop offset="0%" style="stop-color:darkmagenta;stop-opacity:1" />
            <stop offset="50%" style="stop-color:darkcyan;stop-opacity:1" />
        </linearGradient>
    </defs>
</svg>

<svg>
    <defs>
        <linearGradient id="gradient4">
            <stop offset="0%" style="stop-color:darkviolet;stop-opacity:1" />
            <stop offset="50%" style="stop-color:darkgoldenrod;stop-opacity:1" />
        </linearGradient>
    </defs>
</svg>

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' fill= 'url(#gradient1)'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' fill= 'url(#gradient2)'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'  fill= 'url(#gradient3)'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others' fill= 'url(#gradient4)'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

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.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' opacity= '0.5'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' opacity= '0.5'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'  opacity= '0.5'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others' opacity= '0.5'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

Series Border

Use the border property to style the series 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', '5,5', or '2,3,4').

Example: { width: 2, color: '#ff4251', dashArray: '5,5' }.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' [border]='border'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' [border]='border1'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'  [border]='border2'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others' [border]='border3'></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 border1?: Object;
    public border2?: Object;
    public border3?: Object;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
        this.border = {width: 2, color: '#ff4251', dashArray: '5,5'}
        this.border1 = {width: 2, color: '#4C4C4C', dashArray: '5,5'}
        this.border2 = {width: 2, color: '#794F1B', dashArray: '5,5'}
        this.border3 = {width: 2, color: '#1a9a6f', dashArray: '5,5'}
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

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.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' [emptyPointSettings]='emptyPointSettings'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' ></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'  [emptyPointSettings]='emptyPointSettings2'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public emptyPointSettings?: Object;
    public emptyPointSettings2?: Object;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
        this.emptyPointSettings = { mode: 'Zero' };
        this.emptyPointSettings2 = { 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 stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: null,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: undefined, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

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.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' [marker]='marker' [emptyPointSettings]='emptyPointSettings'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' ></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'  [emptyPointSettings]='emptyPointSettings2'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others'></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 emptyPointSettings?: Object;
    public emptyPointSettings2?: Object;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.marker = {visible: true};
        this.title = 'Trend in Sales of Ethical Produce';
        this.emptyPointSettings = { mode: 'Zero', fill: 'red' };
        this.emptyPointSettings2 = { 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 stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: null,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: undefined, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

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.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' [marker]='marker' [emptyPointSettings]='emptyPointSettings'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' ></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'  [emptyPointSettings]='emptyPointSettings2'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others'></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 emptyPointSettings?: Object;
    public emptyPointSettings2?: Object;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.marker = {visible: true};
        this.title = 'Trend in Sales of Ethical Produce';
        this.emptyPointSettings = { mode: 'Zero', fill: 'red', border: { width: 2, color: 'green' } };
        this.emptyPointSettings2 = { 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 stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: null,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: undefined, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

Stack labels

The stack labels in stacked charts display cumulative total values for stack segments directly using data labels. If a stacked point has negative values, the stack labels are displayed below the point.

To enable stack labels, set [stackLabels]='{ visible: true }' on the chart.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService, DataLabelService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService, DataLabelService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title' [stackLabels]='stackLabels' >
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' [marker]='marker' ></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' [marker]='marker'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives' [marker]='marker'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others' [marker]='marker' ></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 stackLabels?:Object;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.marker = { dataLabel: { visible: true } };
        this.stackLabels = { visible: true };
        this.title = 'Trend in Sales of Ethical Produce';
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
        { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
        { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
        { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
        { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
        { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
        { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
        { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
        { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
        { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
        { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
        { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
        { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
        { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
        { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
        { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
    ];

Stack labels customization

Stack labels have various properties for customization to enhance the visual based on your requirements:

visible - Specifies whether stack labels are visible. Setting to true will display the labels. Default is false.
fill - Defines the background color of the stack labels. Accepts valid CSS color strings (hex, RGBA, etc.). Default is transparent.
format - Formats the text displayed in the stack labels. Supports placeholders like {value}. Default is null.
angle - Specifies the rotation angle for stack labels in degrees. Default is 0.
rx - Defines the rounded corner radius along the X-axis (horizontal direction) for the stack label background. Default is 5.
ry - Defines the rounded corner radius along the Y-axis (vertical direction) for the stack label background. Default is 5.
margin - Configures the margin around the stack label (left, right, top, and bottom).
border - Configures the appearance of the stack label’s border.
font - Customizes the stack label text, including font size, color, style, weight, and family.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService, DataLabelService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService, DataLabelService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [title]='title' [stackLabels]='stackLabels' >
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic' [marker]='marker' ></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' [marker]='marker'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives' [marker]='marker'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others' [marker]='marker' ></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 stackLabels?:Object;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.marker = { dataLabel: { visible: true } };
        this.stackLabels = { visible: true, fill: 'rgba(0, 123, 255, 0.5)', format: '{value}', angle: 45, rx: 10, ry: 10, margin: { left: 10, right: 10, top: 10, bottom: 10 }, border: { width: 2, color: '#000' }, font: { size: '14px', color: '#fff', weight: 'bold', family: 'Arial', textAlignment: 'Left' } };
        this.title = 'Trend in Sales of Ethical Produce';
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
        { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
        { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
        { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
        { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
        { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
        { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
        { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
        { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
        { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
        { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
        { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
        { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
        { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
        { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
        { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
    ];

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. The included handler branches on args.series.index (0–3) and assigns a different args.fill per series.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { ISeriesRenderEventArgs } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" (seriesRender)='seriesRender($event)' [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' name='Organic'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' name='Fair-trade' ></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' name='Veg Alternatives'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' name='Others'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.title = 'Trend in Sales of Ethical Produce';
    }
    public seriesRender(args: ISeriesRenderEventArgs) {
        if (args.series.index === 0) {
            args.fill = '#ff4251';
        }
        else if (args.series.index === 1) {
            args.fill = '#4C4C4C';
        }
        else if (args.series.index === 2) {
            args.fill = '#794F1B';
        }
        else if (args.series.index === 3) {
            args.fill = '#1a9a6f';
        }
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
export let stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

Point render

The pointRender event allows you to customize each data point before it is rendered on the chart. The included handler branches on args.point.index and assigns a different args.fill for even versus odd-indexed points.

app.component.ts
main.ts
datasource.ts
import { ChartModule, ChartAllModule } from '@syncfusion/ej2-angular-charts'
import { IPointRenderEventArgs } from '@syncfusion/ej2-angular-charts'
import {  StackingAreaSeriesService, DateTimeService } from '@syncfusion/ej2-angular-charts'


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

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

providers: [StackingAreaSeriesService, DateTimeService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-chart id="chart-container" (pointRender)='pointRender($event)' [primaryXAxis]='primaryXAxis' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y' [marker]='marker' name='Organic'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y1' [marker]='marker' name='Fair-trade' ></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y2' [marker]='marker' name='Veg Alternatives'></e-series>
            <e-series [dataSource]='chartData' type='StackingArea' xName='x' yName='y3' [marker]='marker' name='Others'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData?: Object[];
    public title?: string;
    public marker?: Object;
    ngOnInit(): void {
        this.chartData = stackedData;
        this.primaryXAxis = {
            valueType: 'DateTime'
        };
        this.marker = {visible: true};
        this.title = 'Trend in Sales of Ethical Produce';
    }
    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 stackedData: Object[] = [
    { x: new Date(2000, 0, 1), y: 0.61, y1: 0.03, y2: 0.48, y3: 0.23 },
    { x: new Date(2001, 0, 1), y: 0.81, y1: 0.05, y2: 0.53, y3: 0.17 },
    { x: new Date(2002, 0, 1), y: 0.91, y1: 0.06, y2: 0.57, y3: 0.17 },
    { x: new Date(2003, 0, 1), y: 1,    y1: 0.09, y2: 0.61, y3: 0.20 },
    { x: new Date(2004, 0, 1), y: 1.19, y1: 0.14, y2: 0.63, y3: 0.23 },
    { x: new Date(2005, 0, 1), y: 1.47, y1: 0.20, y2: 0.64, y3: 0.36 },
    { x: new Date(2006, 0, 1), y: 1.74, y1: 0.29, y2: 0.66, y3: 0.43 },
    { x: new Date(2007, 0, 1), y: 1.98, y1: 0.46, y2: 0.76, y3: 0.52 },
    { x: new Date(2008, 0, 1), y: 1.99, y1: 0.64, y2: 0.77, y3: 0.72 },
    { x: new Date(2009, 0, 1), y: 1.70, y1: 0.75, y2: 0.55, y3: 1.29 },
    { x: new Date(2010, 0, 1), y: 1.48, y1: 1.06, y2: 0.54, y3: 1.38 },
    { x: new Date(2011, 0, 1), y: 1.38, y1: 1.25, y2: 0.57, y3: 1.82 },
    { x: new Date(2012, 0, 1), y: 1.66, y1: 1.55, y2: 0.61, y3: 2.16 },
    { x: new Date(2013, 0, 1), y: 1.66, y1: 1.55, y2: 0.67, y3: 2.51 },
    { x: new Date(2014, 0, 1), y: 1.67, y1: 1.65, y2: 0.67, y3: 2.61 }
];

Troubleshooting

Ensure StackingAreaSeriesService is registered in the providers; otherwise the stacked area series will not render.
Stack labels do not appear: set [stackLabels]='{ visible: true }' on the chart.
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.
Gradient fill renders as solid color: the SVG gradients referenced by fill='url(#gradient1)' etc. are not defined. Add matching <linearGradient> (or <radialGradient>) blocks inside a <defs> block in the chart template, or in a global stylesheet.

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