Angular 9 ngFor Example

In this tutorial, I show you how to use Angular 9 ngFor directive with lots of examples.

We can use ngFor directive, if we want to display a dynamic list, for example, an array of elements on the web page.

Check out complete Angular 9 tutorial with examples - Angular 9 Tutorial with Examples

In the previous tutorial, we have developed an angular9-helloworld-example-tutorial project using Angular 9 Example Tutorial and we will continue using the same project to demonstrates the usage of the ngFor directive with examples.

Video

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Create an Angular Component - NgforComponent

Let's create NgforComponent in an existing angular9-helloworld-example-tutorial project with the following command:

C:\Angular\angular9-helloworld-example-tutorial\src\app> ng g c ngfor
CREATE src/app/ngfor/ngfor.component.html (20 bytes)
CREATE src/app/ngfor/ngfor.component.spec.ts (621 bytes)
CREATE src/app/ngfor/ngfor.component.ts (265 bytes)
CREATE src/app/ngfor/ngfor.component.css (0 bytes)
UPDATE src/app/app.module.ts (724 bytes)

ngfor.component.ts - NgforComponent

The ngfor.component.ts file defines the logic associated with NgforComponent. Let's create a users array and we use it in Html template.

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

@Component({
  selector: 'app-ngfor',
  templateUrl: './ngfor.component.html',
  styleUrls: ['./ngfor.component.css']
})
export class NgforComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

  users = [{
    id: 100,
    firstName: "Ramesh",
    lastName: "Fadatare",
    emailId: "ramesh@gmail.com"
  },
  {
    id: 101,
    firstName: "Tony",
    lastName: "Stark",
    emailId: "tony@gmail.com"
  }, {
    id: 100,
    firstName: "Tom",
    lastName: "Cruise",
    emailId: "tom@gmail.com"
  }];
}

ngfor.component.html - ngFor Directive Examples

The ngfor.component.html file defines the HTML template associated with the NgforComponent. Refer the comments in this file are self-descriptive. Replace ngfor.component.html file with the following content in it -

<div class="container">

  <h1> ngFor Directive Examples</h1>

  <!-- ngFor Directive with Table Example -->
  <b> ngFor Directive with Table Example</b>

  <table class="table table-striped">
    <thead>
      <tr>
        <th>Firstname</th>
        <th>Lastname</th>
        <th>Email</th>
      </tr>
    </thead>
    <tbody>
      <tr *ngFor="let user of users">
        <td>{{user.firstName}}</td>
        <td>{{user.lastName}}</td>
        <td>{{user.emailId}}</td>
      </tr>
    </tbody>
  </table>

  <!-- ngFor - simple example -->
  <b> ngFor - simple example</b>
  <ul>
    <li *ngFor="let user of users">
      {{user.firstName}}, {{user.lastName}}
    </li>
  </ul>

  <!-- ngFor - variable ccope example -->
  <b> ngFor - variable ccope example </b>
  <ul>
    <li *ngFor="let user of users" [type]="element">
      {{user.firstName}}, {{user.lastName}}
    </li>
  </ul>

  <!-- ngFor - Get the index of each element example -->
  <b> ngFor - Get the index of each element example </b>
  <ul>
    <li *ngFor="let user of users; let i = index">
      {{i}}. {{user.firstName}}, {{user.lastName}}
    </li>
  </ul>

  <!-- ngFor - first and last variable example  -->
  <b>ngFor - first and last variable example </b>
  <div *ngFor="let user of users; let i = index; let f=first; let l=last;">
    Row {{i}} : Name: {{user.firstName}} {{user.lastName}} , is first row: {{f}}, is last row: {{l}}
  </div>

  <!-- nfFor - even and odd variable example -->
  <b>nfFor - even and odd variable example </b>
  <div *ngFor="let user of users; let i = index; let e=even; let o=odd;">
    Row {{i}} : Name: {{user.firstName}} {{user.lastName}} , is even row: {{e}}, is odd row: {{o}}
  </div>
</div>

app-routing.module.ts - Add Entry Routing

Let's add an entry in app-routing.module.ts file :

{path: 'ng-for', component: NgforComponent}

Here is the complete code:

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HelloWorldComponent } from './hello-world/hello-world.component';
import { NgforComponent } from './ngfor/ngfor.component';
import { NgifComponent } from './ngif/ngif.component';

const routes: Routes = [
  {path: '', component: HelloWorldComponent},
  {path: 'hello-world', component: HelloWorldComponent},
  {path: 'ng-for', component: NgforComponent}
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

Output

Hit this link in browser: http://localhost:4200/ng-for 

Check out complete Angular 9 tutorial with examples - Angular 9 Tutorial with Examples.