How to Initialize an Array in Angular 2 and Typescript?

Input Binding –

·

Output Binding –

·

Two Way Binding –

·

Stayed Informed – Angular2 documentations and examples

Syntax –

export class HomeComponent {
    userlist: Users[];

    constructor() {
        this.userlist = [{ Id: '1001', name: 'Anil SIngh', site: 'http://www.code-sample.com' },
        { Id: '1002', name: 'Alok', site: 'http://www.code-view.com' },
        { Id: '1003', name: 'Reena', site: 'http://www.code-sample.xyz' },
        { Id: '1004', name: 'Dilip', site: 'http://www.codefari.com' },
        ];
    }
}
export class Users {
    Id: String;
    name: String;
    site: String;
}

The below example help us to learn for Initialize an array in angular2 and typescript as following as,

home.component.html :-

<div class="row">
<div class="col-lg-12">
<div class="ibox float-e-margins">
<div class="ibox-title">
    <h5>Angular 2 for loop typescript example - *ngFor</h5>
</div>
<div class="ibox-title">
    <input type="text" [(value)]="values" (keyup)="onKeyUp($event)" /> <strong>Resut- {{values}}</strong>
</div>
<div class="ibox-content">
    <div class="table-responsive">
        <table class="table table-striped">
            <thead>
                <tr>
                    <th>ID</th>
                    <th>Name </th>
                    <th>SiteUrl </th>
                    <th>Actions </th>
                </tr>
            </thead>
            <tbody>
                <tr *ngFor="let user of userlist; let i = index" class="tbl-row-border">
                    <td>{{user.Id}}</td>
                    <td>{{user.name}}</td>
                    <td><a href="{{user.site}}" target="_blank">{{user.site}}</a></td>
                    <td><a (click)="addUser(user)">A</a>|<a (click)="updateUser(user)">E</a>|<a (click)="deleteUser(user)">D</a></td>
                </tr>
            </tbody>
        </table>
    </div>
</div>
</div>
</div>
</div>

home.component.ts :-

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

@Component({
    selector: 'home',
    templateUrl: './home.component.html',
    //styleUrls: ['./home.component.css'],
    styles: ['.tbl-row-border { border: 1px solid red;}']
})

export class HomeComponent {
    userlist: Users[];

    constructor() {
        this.userlist = [{ Id: '1001', name: 'Anil SIngh', site: 'http://www.code-sample.com' },
        { Id: '1002', name: 'Alok', site: 'http://www.code-view.com' },
        { Id: '1003', name: 'Reena', site: 'http://www.code-sample.xyz' },
        { Id: '1004', name: 'Dilip', site: 'http://www.codefari.com' },
        ];
    }

    values = '';
    onKeyUp(event: any) {
        this.values = event.target.value;
    };

    addUser(user) {
        alert(JSON.stringify(user));
    };

    updateUser(user) {
        alert(JSON.stringify(user));
    };

    deleteUser(user) {
        alert(JSON.stringify(user));
    };
}

export class Users {
    Id: String;
    name: String;
    site: String;
}

app.module.ts :-

import { NgModule } from '@angular/core';
import { RouterModule } from '@angular/router';
import { UniversalModule } from 'angular2-universal';
import { AppComponent } from './components/app/app.component';
import { HomeComponent } from './components/home/home.component';
import { HeaderComponent } from './components/shared/header/header.component';
import { MenuComponent } from './components/menu/menu.component';

@NgModule({
    bootstrap: [ AppComponent ],
    declarations: [
        AppComponent,
        HomeComponent,
        HeaderComponent,
        MenuComponent        
    ],
    imports: [
        UniversalModule, // Must be first import. This automatically imports BrowserModule, HttpModule, and JsonpModule too.
        RouterModule.forRoot([
            { path: '', redirectTo: 'home', pathMatch: 'full' },
            { path: 'home', component: HomeComponent },
            { path: '**', redirectTo: 'home' }
        ])
    ]
})
export class AppModule {
}

I hope you are enjoying with this post! Please share with you friends. Thank you!!

Pin it

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..

My Tech Blog - https://www.code-sample.com/
My Books - Book 1 and Book 2