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Range Step Area Chart in Angular Charts

3 Feb 202624 minutes to read

Range Step Area

To render a range step 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 RangeStepArea in your chart configuration. This indicates that the data should be represented as a range step area chart, which is ideal for displaying data points as a range with high and low values. It connects these points with vertical and horizontal lines, creating a step like appearance.

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

  3. Provide high and low values: The RangeStepArea series requires two y-values for each data point, you need to specify both the high and low values. The high value represents the maximum range, while the low value represents the minimum range for each data point. These values define the upper and lower boundaries of the area for each point on the chart.

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


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings?: Object;
    public border?: Object;
    ngOnInit(): void {
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings?: Object;
    public border?: Object;
    ngOnInit(): void {
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 22 }
];

Series customization

The following properties can be used to customize the range step 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' fill='red'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public border?: Object;
    ngOnInit(): void {
        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: 'black'
        };
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' opacity='0.5'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 22 }
];

Border

Use the border property to configure the border width, color, and dasharray of the range step 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, RangeStepAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' 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 chartData: Object[] = chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public border?: Object;
    ngOnInit(): void {
        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.border= { width: 2, color: '#ff4251', dashArray: '5' }
    }
}
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: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 22 }
];

Step

Use the step property to change the position of the steps in a range step 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, RangeStepAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' name='India' step='Right'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] = chartData;
    public title?: string;
    public primaryYAxis?: Object;
    ngOnInit(): void {
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 22 }
];

No risers

You can eliminate the vertical lines between points by using the noRisers property in a series. This approach is useful for highlighting trends without the distraction of risers.

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, RangeStepAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' name='India' noRisers='true' opacity='0.1' [border]='border'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] = chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public border?: object;
    ngOnInit(): void {
        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: 1.5};
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' [emptyPointSettings]='emptyPointSettings'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings?: Object;
    public border?: Object;
    ngOnInit(): void {
        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.emptyPointSettings = {
        mode: 'Gap'
    }
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: null, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: undefined },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' [emptyPointSettings]='emptyPointSettings' [marker]='marker'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings?: Object;
    public border?: Object;
    public marker?: Object;
    ngOnInit(): void {
        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.emptyPointSettings = {
        mode: 'Average', fill: 'red'
    };
    this.marker = { visible: true };
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: null, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: undefined },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' [emptyPointSettings]='emptyPointSettings' [marker]='marker'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings?: Object;
    public border?: Object;
    public marker?: Object;
    ngOnInit(): void {
        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.emptyPointSettings = {
        mode: 'Average', fill: 'red', border: {width: 2, color: 'blue'}
    };
    this.marker = { visible: true };
        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 chartData: Object[] = [
    { x: 'Jan', high: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: null, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: undefined },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings?: Object;
    public border?: Object;
    ngOnInit(): void {
        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) {
        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: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 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, RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, 
    DateTimeService, CategoryService, MultiColoredAreaSeriesService, StackingStepAreaSeriesService, SplineRangeAreaSeriesService } from '@syncfusion/ej2-angular-charts'
import { chartData } from './datasource'


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

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

providers: [ AreaSeriesService , RangeStepAreaSeriesService, StepAreaSeriesService, StackingAreaSeriesService, RangeStepAreaSeriesService,
               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='RangeStepArea' xName='x' high='high' low='low' [marker]='marker'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis?: Object;
    public chartData: Object[] =  chartData;
    public title?: string;
    public primaryYAxis?: Object;
    public emptyPointSettings?: Object;
    public border?: Object;
    public marker?: Object;
    ngOnInit(): void {
        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.marker = { visible: true};
    }
    public pointRender(args: IPointRenderEventArgs) {
        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: 29, low: 19 },
    { x: 'Feb', high: 32, low: 22 },
    { x: 'Mar', high: 35, low: 25 },
    { x: 'Apr', high: 37, low: 27 },
    { x: 'May', high: 35, low: 25 },
    { x: 'Jun', high: 32, low: 22 },
    { x: 'Jul', high: 30, low: 20 },
    { x: 'Aug', high: 32, low: 22 },
    { x: 'Sep', high: 35, low: 25 },
    { x: 'Oct', high: 37, low: 27 },
    { x: 'Nov', high: 35, low: 25 },
    { x: 'Dec', high: 32, low: 22 }
];

See also