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Getting started with Angular Chart component

This section explains you the steps required to create a simple Chart and demonstrate the basic usage of the Chart component in an Angular environment.

To get start quickly with Angular Chart using CLI and Schematics, you can check on this video:

Setup Angular Environment

You can use Angular CLI to setup your Angular applications. To install Angular CLI use the following command.

npm install -g @angular/cli

Create an Angular Application

Start a new Angular application using below Angular CLI command.

ng new my-app
cd my-app

Adding Syncfusion Chart package

All the available Essential JS 2 packages are published in npmjs.com registry.

To install Chart component, use the following command.

npm install @syncfusion/ej2-angular-charts --save

The —save will instruct NPM to include the chart package inside of the dependencies section of the package.json.

Registering Chart Module

Import Chart module into Angular application(app.module.ts) from the package @syncfusion/ej2-angular-charts [src/app/app.module.ts].

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
// import the ChartModule for the Chart component
import { ChartModule } from '@syncfusion/ej2-angular-charts';
import { AppComponent }  from './app.component';

@NgModule({
  //declaration of ChartModule into NgModule
  imports:      [ BrowserModule, ChartModule ],
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }
  • Modify the template in app.component.ts file to render the ej2-angular-charts component [src/app/app.component.ts].
import { Component, ViewEncapsulation } from '@angular/core';

@Component({
  selector: 'app-container',
  // specifies the template string for the Charts component
  template: `<ejs-chart id='chart-container'></ejs-chart>`,
  encapsulation: ViewEncapsulation.None
})
export class AppComponent  { }

Now use the app-container in the index.html instead of default one.

<app-container></app-container>
  • Now run the application in the browser using the below command.
npm start

The below example shows a basic Charts.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    // specifies the template string for the Chart component
    template: `<ejs-chart id="chart-container"></ejs-chart>`
})
export class AppComponent {

}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Module Injection

Chart component are segregated into individual feature-wise modules. In order to use a particular feature, you need to inject its feature service in the AppModule. In the current application, we are going to modify the above basic chart to visualize sales data for a particular year. For this application we are going to use line series, tooltip, data label, category axis and legend feature of the chart. Please find relevant feature service name and description as follows.

  • LineSeriesService - Inject this provider to use line series.
  • LegendService - Inject this provider to use legend feature.
  • TooltipService - Inject this provider to use tooltip feature.
  • DataLabelService - Inject this provider to use datalabel feature.
  • CategoryService - Inject this provider to use category feature.

These modules should be injected to the provider section as follows,

   import { NgModule } from '@angular/core';
   import { BrowserModule } from '@angular/platform-browser';
   import { AppComponent } from './app.component';
   import { ChartComponent } from '@syncfusion/ej2-angular-charts';
   import { CategoryService, LegendService, TooltipService } from '@syncfusion/ej2-angular-charts';
   import { DataLabelService, LineSeriesService} from '@syncfusion/ej2-angular-charts';

   @NgModule({
       imports: [
           BrowserModule,
       ],
       declarations: [AppComponent, ChartComponent],
       bootstrap: [AppComponent],
       providers: [ CategoryService, LegendService, TooltipService, DataLabelService, LineSeriesService ]
   })

Populate Chart with Data

This section explains how to plot below JSON data to the chart.

    export class AppComponent implements OnInit {
    public chartData: Object[];
    ngOnInit(): void {
        // Data for chart series
        this.chartData = [
            { month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
            { month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
            { month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
            { month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
            { month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
            { month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
        ];
    }

}

Add a series object to the chart by using series property. Now map the field names month and sales in the JSON data to the xName and yName properties of the series, then set the JSON data to dataSource property.

Since the JSON contains category data, set the valueTypefor horizontal axis to Category. By default, the axis valueType is Numeric.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';

@Component({
    selector: 'app-container',
    template:
    `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='Line' xName='month' yName='sales' name='Sales'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis: Object;
    public chartData: Object[];
    ngOnInit(): void {
        // Data for chart series
        this.chartData = [
            { month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
            { month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
            { month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
            { month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
            { month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
            { month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
        ];
        this.primaryXAxis = {
            valueType: 'Category'
        };
    }

}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule } from '@syncfusion/ej2-angular-charts';
import { CategoryService, LineSeriesService} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ CategoryService, LineSeriesService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

The sales data are in thousands, so format the vertical axis label by adding $ as a prefix and K as a suffix to each label. This can be achieved by setting the ${value}K to the labelFormat property of axis. Here, {value} act as a placeholder for each axis label.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';

@Component({
    selector: 'app-container',
    template:
    `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [primaryYAxis]='primaryYAxis'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='Line' xName='month' yName='sales' name='Sales'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis: Object;
    public primaryYAxis: Object;
    public chartData: Object[];
    ngOnInit(): void {
        this.chartData = [
            { month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
            { month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
            { month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
            { month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
            { month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
            { month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
        ];
        this.primaryXAxis = {
            valueType: 'Category'
        };
        this.primaryYAxis = {
            labelFormat: '${value}K'
        };
    }

}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule } from '@syncfusion/ej2-angular-charts';
import { CategoryService, LineSeriesService} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ CategoryService, LineSeriesService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Add Chart Title

You can add a title using title property to the chart to provide quick information to the user about the data plotted in the chart.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';

@Component({
    selector: 'app-container',
    template:
    `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [primaryYAxis]='primaryYAxis'
    [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='Line' xName='month' yName='sales' name='Sales'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis: Object;
    public chartData: Object[];
    public primaryYAxis: Object;
    public title: string;
    ngOnInit(): void {
        // Title for chart
        this.title = 'Sales Analysis';
        this.chartData = [
            { month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
            { month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
            { month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
            { month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
            { month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
            { month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
        ];
        this.primaryXAxis = {
            valueType: 'Category'
        };
        this.primaryYAxis = {
            labelFormat: '${value}K'
        };
    }

}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule} from '@syncfusion/ej2-angular-charts';
import { CategoryService, LegendService, TooltipService, DataLabelService, LineSeriesService} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ CategoryService, LegendService, TooltipService, DataLabelService, LineSeriesService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Enable Legend

You can use legend for the chart by setting the visible property to true in legendSettings object and by injecting the LegendService into the @NgModule.providers.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';

@Component({
    selector: 'app-container',
    template:
    `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [primaryYAxis]='primaryYAxis' [legendSettings]='legendSettings' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='Line' xName='month' yName='sales' name='Sales'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis: Object;
    public chartData: Object[];
    public primaryYAxis: Object;
    public legendSettings: Object;
    public title: string;
    ngOnInit(): void {
        // Legend for chart
        this.legendSettings = {
            visible: true
        }
        this.chartData = [
            { month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
            { month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
            { month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
            { month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
            { month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
            { month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
        ];
        this.primaryXAxis = {
            valueType: 'Category'
        };
        this.primaryYAxis = {
            labelFormat: '${value}K'
        };
        this.title = 'Sales Analysis';
    }

}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule } from '@syncfusion/ej2-angular-charts';
import { CategoryService, LegendService, LineSeriesService} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ CategoryService, LegendService, LineSeriesService ]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Add Data Label

You can add data labels to improve the readability of the chart. This can be achieved by setting the visible property to true in the dataLabel object and by injecting DataLabelService into the @NgModule.providers.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';

@Component({
    selector: 'app-container',
    template:
    `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [primaryYAxis]='primaryYAxis' [legendSettings]='legendSettings' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='Line' xName='month' yName='sales' name='Sales' [marker]='marker'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis: Object;
    public chartData: Object[];
    public primaryYAxis: Object;
    public legendSettings: Object;
    public marker: Object;
    public title: string;
    ngOnInit(): void {
        // Data label for chart series
        this.marker = {
            dataLabel:{
                visible: true
            }
        };
        this.chartData = [
            { month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
            { month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
            { month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
            { month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
            { month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
            { month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
        ];
        this.primaryXAxis = {
            valueType: 'Category'
        };
        this.primaryYAxis = {
            labelFormat: '${value}K'
        };
        this.legendSettings = {
            visible: true
        };
        this.title = 'Sales Analysis';
    }

}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule } from '@syncfusion/ej2-angular-charts';
import { CategoryService, LegendService, DataLabelService, LineSeriesService} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ CategoryService, LegendService, DataLabelService, LineSeriesService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Enable Tooltip

The tooltip is useful when you cannot display information by using the data labels due to space constraints. You can enable tooltip by setting the enable property as true in tooltip object and by injecting TooltipService into the @NgModule.providers.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit } from '@angular/core';

@Component({
    selector: 'app-container',
    template:
    `<ejs-chart id="chart-container" [primaryXAxis]='primaryXAxis' [primaryYAxis]='primaryYAxis'
    [legendSettings]='legendSettings' [tooltip]='tooltip' [title]='title'>
        <e-series-collection>
            <e-series [dataSource]='chartData' type='Line' xName='month' yName='sales' name='Sales' [marker]='marker'></e-series>
        </e-series-collection>
    </ejs-chart>`
})
export class AppComponent implements OnInit {
    public primaryXAxis: Object;
    public chartData: Object[];
    public primaryYAxis: Object;
    public legendSettings: Object;
    public tooltip: Object;
    public title: string;
    public marker: Object;
    ngOnInit(): void {
        // Tooltip for chart
        this.tooltip = {
            enable: true
        }
        this.chartData = [
            { month: 'Jan', sales: 35 }, { month: 'Feb', sales: 28 },
            { month: 'Mar', sales: 34 }, { month: 'Apr', sales: 32 },
            { month: 'May', sales: 40 }, { month: 'Jun', sales: 32 },
            { month: 'Jul', sales: 35 }, { month: 'Aug', sales: 55 },
            { month: 'Sep', sales: 38 }, { month: 'Oct', sales: 30 },
            { month: 'Nov', sales: 25 }, { month: 'Dec', sales: 32 }
        ];
        this.primaryXAxis = {
            valueType: 'Category'
        };
        this.primaryYAxis = {
            labelFormat: '${value}K'
        };
        this.marker = {
            dataLabel:{
                visible: true
            }
        };
        this.legendSettings = {
            visible: true
        };
        this.title = 'Sales Analysis';
    }

}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ChartModule} from '@syncfusion/ej2-angular-charts';
import { CategoryService, LegendService, TooltipService, DataLabelService, LineSeriesService} from '@syncfusion/ej2-angular-charts';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ChartModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [ CategoryService, LegendService, TooltipService, DataLabelService, LineSeriesService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
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