Angular Bootstrap Collapse Example

Angular Bootstrap Collapse Example

In this post we will give you information about Angular Bootstrap Collapse Example. Hear we will give you detail about Angular Bootstrap Collapse ExampleAnd how to use it also give you demo for it if it is necessary.

This post will give you example of bootstrap collapse in angular. i explained simply step by step use bootstrap collapse in angular. you will learn bootstrap collapse panel in angular. i would like to show you angular bootstrap 4 collapse. Let’s see bellow example angular bootstrap 4 collapse animation.

You can easily us bootstrap collapse in angular 6, angular 7, angular 8 and angular 9 using ng-boottrap example.

Ng Bootstrap is developed from bootstrap and they provide all bootstrap 3 and bootstrap 4 native Angular directives like model, collapse, tooltip, tabs, pagination, datepicker, buttons etc. Ng Bootstrap will help to easily use bootstrap ui.

In this example we will simply create collapse, so you can use in your angular application. we will use collapse step by step, so you can easily understand.

So, let’s follow this tutorial step by step.

Step 1: Create New App

You can easily create your angular app using bellow command:

ng new my-new-app

Step 2: Install Bootstrap 4

In this step, we will install bootstrap core package. so we can use bootstrap css so let’s install by following command:

npm install bootstrap --save

Now, we need to include bootstrap css like “node_modules/bootstrap/dist/css/bootstrap.min.css”, so let’s add it on angular.json file.



"styles": [





Also see:How to Add Bootstrap in Angular 8 | Install Bootstrap 4 in Angular 8

Step 3: Install Ng Bootstrap

In this step, we will install Ng Bootstrap package. so we can use bootstrap ui so let’s install by following command:

npm install --save @ng-bootstrap/ng-bootstrap

Step 4: Import Module

In this step, we need to import NgbModule to app.module.ts file. so let’s import it as like bellow:


import { BrowserModule } from '@angular/platform-browser';

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

import { AppComponent } from './app.component';

import {NgbModule} from '@ng-bootstrap/ng-bootstrap';


declarations: [



imports: [




providers: [],

bootstrap: [AppComponent]


export class AppModule { }

Step 5: Updated View File

Now here, we will updated our html file. we will create simple bootstrap collapse example as like bellow.

so let’s put bellow code:


<div >

<h1>Angular Bootstrap Collapse Example -</h1>


<button type="button" (click)="isCollapsed = !isCollapsed"

[attr.aria-expanded]="!isCollapsed" aria-controls="collapseExample">

Collapse Toggle



<div id="collapseExample" [ngbCollapse]="isCollapsed">

<div >

<div >

You can collapse this card by clicking Toggle Button. This is example from





Step 6: Updated ts File

Now, let’s update file as like bellow:


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


selector: 'app-root',

templateUrl: './app.component.html',

styleUrls: ['./app.component.css']


export class AppComponent {

title = 'appBootstrap';

public isCollapsed = false;

constructor() {}


Now we are ready to run both:

Run Angular App:

Also see:How to Use Bootstrap Tabs with Angular?

ng serve

I hope it can help you…

Hope this code and post will helped you for implement Angular Bootstrap Collapse Example. if you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section. Your comment will help us for help you more and improve us. we will give you this type of more interesting post in featured also so, For more interesting post and code Keep reading our blogs

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