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Getting started with Angular AutoComplete component

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

Dependencies

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

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

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-autocomplete

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-autocomplete --style=scss

Navigate to the created project folder.

cd syncfusion-angular-autocomplete

Adding AutoComplete package

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

To install AutoComplete 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 AutoComplete package inside of the dependencies section of the package.json.

Registering AutoComplete module

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

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

@NgModule({
  //declaration of ej2-angular-dropdowns module into NgModule
  imports:      [ BrowserModule, AutoCompleteModule ],
  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 AutoComplete component

Modify the template in [src/app/app.component.ts] file to render the AutoComplete component. Add the Angular Autocomplete by using <ejs-autocomplete> 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 AutoComplete component
  template: `<ejs-autocomplete id='atcelement'></ejs-autocomplete>`
})
export class AppComponent  { }

Binding data source

After initializing, populate the data in AutoComplete using dataSource property. Here, an array of string values is passed to the AutoComplete component.

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

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

Running the application

After completing the configuration required to render a basic AutoComplete, 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 AutoComplete component with dataSource
    template: `<ejs-autocomplete id='atcelement' [dataSource]='sportsData'></ejs-autocomplete>`
})
export class AppComponent {
    constructor() {
    }
    // defined the array of data
    public sportsData: string[] = ['Badminton', 'Basketball', 'Cricket', 'Football', 'Golf', 'Gymnastics'];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { AutoCompleteModule } from '@syncfusion/ej2-angular-dropdowns';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, ReactiveFormsModule, AutoCompleteModule, 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);

Configure the popup list

By default, the width of the popup list automatically adjusts according to the DropDownList input element’s width, and the height of the popup list has ‘300px’.

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.

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 AutoComplete component with dataSource
    template: `<ejs-autocomplete id='atcelement' [dataSource]='sportsData' [popupHeight]='height' [popupWidth]='width' [placeholder]='text'></ejs-autocomplete>`
})
export class AppComponent {
    constructor() {
    }
    // defined the array of data
    public sportsData: string[] = ['Badminton', 'Cricket', 'Football', 'Golf', 'Hockey', 'Rugby', 'Snooker', 'Tennis'];
    // set width of the popup list
    public width: string = '250px';
    // set height of the popup list
    public height: string = '200px';
    // set placeholder to autocomplete element
    public text: string = "Find a game"
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { AutoCompleteModule } from '@syncfusion/ej2-angular-dropdowns';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, ReactiveFormsModule, AutoCompleteModule, 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);

Two-way binding

In AutoComplete, the value property supports two-way binding functionality. The following example demonstrates how to work with the two-way binding functionality in AutoComplete.

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 AutoComplete component and
    // input element for checking the two-way binding support using value property
    template: `<ejs-autocomplete id='atcelement' [dataSource]='sportsData' [(value)]='value'></ejs-autocomplete>
    <div style='margin-top: 50px'>
        <input type="text" [(ngModel)]="value" style="width:245px;height:25px" />
     </div>`
})
export class AppComponent {
    constructor() {
    }
    // defined the array of complex data
    public sportsData: string[] = ['Badminton', 'Basketball', 'Cricket', 'Football', 'Golf', 'Gymnastics'];
    // set a value to pre-select
    public value: string = 'Badminton';
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { AutoCompleteModule } from '@syncfusion/ej2-angular-dropdowns';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, ReactiveFormsModule, AutoCompleteModule, 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);

See Also