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Getting started with Angular MultiSelect component

This section explains how to create a simple MultiSelect component and configure its available functionalities in Angular.

Dependencies

The following list of dependencies are required to use the MultiSelect component in your application.

|-- @syncfusion/ej2-angular-dropdowns
    |-- @syncfusion/ej2-base
    |-- @syncfusion/ej2-data
    |-- @syncfusion/ej2-angular-base
    |-- @syncfusion/ej2-dropdowns
        |-- @syncfusion/ej2-inputs
        |-- @syncfusion/ej2-lists
        |-- @syncfusion/ej2-navigations
        |-- @syncfusion/ej2-popups
            |-- @syncfusion/ej2-buttons

Setup angular environment

Angular provides the easiest way to set angular CLI projects using Angular CLI tool.

Install the CLI application globally to your machine.

npm install -g @angular/cli

Create a new application

ng new syncfusion-angular-multiselect

By default, it install the CSS style base application. To setup with SCSS, pass —style=scss argument on create project.

Example code snippet.

ng new syncfusion-angular-multiselect --style=scss

Navigate to the created project folder.

cd syncfusion-angular-multiselect

Adding MultiSelect package

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

To install MultiSelect component, use the following command.

npm install @syncfusion/ej2-angular-dropdowns --save
(or)
npm i @syncfusion/ej2-angular-dropdowns --save

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

Registering MultiSelect module

Import MultiSelect module into Angular application(app.module.ts) from the package @syncfusion/ej2-angular-dropdowns.

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
// import the MultiSelectModule for the MultiSelect component
import { MultiSelectModule } from '@syncfusion/ej2-angular-dropdowns';
import { AppComponent }  from './app.component';

@NgModule({
  //declaration of ej2-angular-dropdowns module into NgModule
  imports:      [ BrowserModule, MultiSelectModule ],
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

Adding CSS reference

The following CSS files are available in ../node_modules/@syncfusion package folder. This can be referenced in [src/styles.css] using following code.

@import '../node_modules/@syncfusion/ej2-base/styles/material.css';
@import '../node_modules/@syncfusion/ej2-buttons/styles/material.css';
@import '../node_modules/@syncfusion/ej2-dropdowns/styles/material.css';
@import '../node_modules/@syncfusion/ej2-inputs/styles/material.css';
@import '../node_modules/@syncfusion/ej2-popups/styles/material.css';
@import '../node_modules/@syncfusion/ej2-lists/styles/material.css';
@import '../node_modules/@syncfusion/ej2-angular-dropdowns/styles/material.css';

Adding MultiSelect component

Modify the template in [src/app/app.component.ts] file to render the MultiSelect component. Add the Angular MultiSelect by using <ejs-multiselect> selector in template section of the app.component.ts file.

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

@Component({
  selector: 'app-root',
  // specifies the template string for the MultiSelect component
  template: `<ejs-multiselect id='multiselectelement'></ejs-multiselect>`
})
export class AppComponent  { }

Binding data source

After initialization, populate the MultiSelect with data using the dataSource property. Here, an array of string values passed to MultiSelect component.

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

@Component({
    selector: 'app-root',
    // specifies the template string for the MultiSelect component
    template: `<ejs-multiselect id='multiselectelement' [dataSource]='data'></ejs-multiselect>`
})
export class AppComponent {
    constructor() {
    }
    // defined the array of data
    public data: string[] = ['Badminton', 'Basketball', 'Cricket', 'Football', 'Golf', 'Gymnastics', 'Hockey', 'Rugby', 'Snooker', 'Tennis'];
}

Running the application

After completing the configuration required to render a basic MultiSelect, run the following command to display the output in your default browser.

ng serve

The following example illustrates the output in your browser.

Source

Preview

app.component.ts

app.module.ts

main.ts

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

@Component({
    selector: 'app-root',
    // specifies the template string for the MultiSelect component with dataSource
    template: `<ejs-multiselect id='multiselectelement' [dataSource]='data' [placeholder]='placeholder'></ejs-multiselect>`
})
export class AppComponent {
    constructor() {
    }
    // defined the array of data
    public data: string[] = ['Badminton', 'Cricket', 'Football', 'Golf', 'Tennis'];
    // set placeholder to MultiSelect input element
    public placeholder: string = 'Select games';
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { MultiSelectModule } from '@syncfusion/ej2-angular-dropdowns';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, ReactiveFormsModule, MultiSelectModule, ButtonModule
    ],
    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);

By default, the width of the popup list automatically adjusts according to the MultiSelect input element’s width, and the height auto adjust’s according to the height of the popup list items.

The height and width of the popup list can also be customized using the popupHeight and popupWidth properties respectively.

In the following sample, popup list’s width and height are configured.