How to reuse template HTML block in Angular ?

Code Reusability is the capacity to repurpose pre-existing code when developing new software applications. It will allow you to store a piece of code that does a single task inside a defined block, and then call that code whenever you need it. In this article, we will learn How to reuse template HTML blocks in Angular.

Steps for Installing & Configuring the Angular Application

Step 1: Create an Angular application using the following command.

ng new appname

Step 2: After creating your project folder i.e. appname, move to it using the following command.

cd appname

Project Structure

It will look like the following:

Example 1: In this example, we will create a reuse a <h2> tag

HTML

<!-- app.component.html -->
<ng-template #MsgRef>
    <h2 style="color: red">GeeksforGeeks</h2>
    <br>
</ng-template>
<h2 style="color: green;">GeeksforGeeks</h2>
<h2>How to reuse template HTML block in Angular ?</h2>
<ng-template [ngTemplateOutlet]="MsgRef"></ng-template>
<ng-template [ngTemplateOutlet]="MsgRef"></ng-template>
<ng-template [ngTemplateOutlet]="MsgRef"></ng-template>

Javascript

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

@Component({
    selector: 'app-root',
    templateUrl: "./app.component.html",
    styleUrls: ['./app.component.css']
})

export class AppComponent { }

Javascript

// app.module.ts
import { NgModule }
    from '@angular/core';
import { BrowserModule }
    from '@angular/platform-browser';
import { HttpClientModule }
    from '@angular/common/http';
import { AppComponent }
    from './app.component';

@NgModule({
    declarations: [
        AppComponent,
    ],
    imports: [
        BrowserModule,
        HttpClientModule,
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

Output:

Example 2: In this example, we will reuse an image template.

HTML

<!-- app.component.html -->
<ng-template #MsgRef>
    <img src=
"https://media.geeksforgeeks.org/wp-content/uploads/20231009182919/Angular-PrimeNG-copy.webp">
    <br>
</ng-template>
<h2 style="color: green;">GeeksforGeeks</h2>
<h2>How to reuse template HTML block in Angular ?</h2>
<ng-template [ngTemplateOutlet]="MsgRef"></ng-template>

<ng-template [ngTemplateOutlet]="MsgRef"></ng-template>
<ng-template [ngTemplateOutlet]="MsgRef"></ng-template>

Javascript

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

@Component({
    selector: 'app-root',
    templateUrl: "./app.component.html",
    styleUrls: ['./app.component.css']
})

export class AppComponent { }

Javascript

// app.module.ts
import { NgModule }
    from '@angular/core';
import { BrowserModule }
    from '@angular/platform-browser';
import { HttpClientModule }
    from '@angular/common/http';
import { AppComponent }
    from './app.component';

@NgModule({
    declarations: [
        AppComponent,
    ],
    imports: [
        BrowserModule,
        HttpClientModule,
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

Output: