In this article, we are going to see different ways to install bootstrap 4 into our Angular 10 application. If you don’t have angular 10 installed on your local machine, you can see this tutorial on how to install it.
Prerequisites
- Familiarity with HTML, CSS, and JavaScript (ES6+).
- Vs code or any code editor installed on your development machine.
- Basic knowledge of Angular
Setting up our Angular Bootstrap application
We will start by setting up a new Angular application using the Angular’s CLI. To do this, create a directory and open up your terminal in that directory:
ng new bootstrap-angular
Running this command will prompt some question for the installation. type N to remove angular routing and select css as the stylesheet format for our application.
After installation, we into the project directory by typing cd bootstrap-angular on your terminal.
Bootstrap consist of the bootstrap’s core script and jQuery. We will use npm to install and setup this package. To do this open up your terminal and run this command. Ensure that you are on your projects working directory):
npm install --save bootstrap jquery
After installation we have to add this to our angular package.
The first method is by adding it in our angular.json file. Open up the angular.json file and import it in the styles and script array:
"styles": [
"src/styles.css",
"./node_modules/bootstrap/dist/css/bootstrap.css"
],
"scripts": [
"./node_modules/jquery/dist/jquery.js",
"./node_modules/bootstrap/dist/js/bootstrap.js"
]
This will add the bootstrap script and styles into our application. With this done we can now try bootstrap components by modifying our codes in our src/app/app.components.html file to this:
<section>
<div class="container">
<div class="row">
<div class="col-md-12">
<!-- testing buttons -->
<button class="btn btn-primary">Hello World</button>
<div
class="alert alert-warning alert-dismissible fade show"
role="alert"
>
<strong>Hi..</strong> I'm Sunil..I write Angular
<button
type="button"
class="close"
data-dismiss="alert"
aria-label="Close"
>
<span aria-hidden="true">×</span>
</button>
</div>
</div>
</div>
</div>
</section>
We can open our application by running ng serve on our terminal. This will open up our application on port 4200:
Using Bootstrap CDN method
Another way of adding bootstrap in our application is by adding the bootstrap CDN in our root index.html file. To confirm that this is working, you can remove the code you added in the angular.json file. Modify the src/index.html file to this:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>BootstrapAngular</title>
<base href="/">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" type="image/x-icon" href="favicon.ico">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"
integrity="sha384-JcKb8q3iqJ61gNV9KGb8thSsNjpSL0n8PARn9HuZOnIxN0hoP+VmmDGMN5t9UJ0Z" crossorigin="anonymous">
</head>
<body>
<app-root></app-root>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"
integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous">
</script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"
integrity="sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN" crossorigin="anonymous">
</script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"
integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous">
</script>
</body>
</html>
If this doesn’t work immediately, you will have to restart your application to see the changes.
Using ng-bootstrap method
Another good method is by using the ng-bootstrap widget. This has all the bootstrap components that we can use in our application.
To install it open up your terminal and type the following:
ng add @ng-bootstrap/ng-bootstrap
Using ng add configures the package for which makes work easier. Now we can test our component by modifing our src/app/app.component.html file to this:
<section>
<div class="container">
<div class="row">
<div class="col-md-12">
<ul ngbNav #nav="ngbNav" class="nav-tabs">
<li ngbNavItem>
<a ngbNavLink>First</a>
<ng-template ngbNavContent>First content</ng-template>
</li>
<li ngbNavItem>
<a ngbNavLink>Second</a>
<ng-template ngbNavContent>Second content</ng-template>
</li>
</ul>
<div [ngbNavOutlet]="nav"></div>
</div>
</div>
</div>
</section>
We can add some bootstrap components into our application by using their specific component.
Alert Component
<section>
<p>
<ngb-alert [dismissible]="false">
<strong>Warning!</strong> Sunil is Here for more Angular Templates and Tips
</ngb-alert>
</p>
</section>
Here the alert component can be accessed using ngb-alert
Carousel Component
<section>
<ngb-carousel>
<ng-template ngbSlide>
<div class="picsum-img-wrapper">
<img
src="https://images.pexels.com/photos/5103656/pexels-photo-5103656.jpeg?auto=compress&cs=tinysrgb&dpr=2&w=500"
alt="Random first slide" height="600" width="100%" style="object-fit: cover;">
</div>
<div class="carousel-caption">
<h3>First slide label</h3>
<p>Wrappixel Makes the best templates</p>
</div>
</ng-template>
<ng-template ngbSlide>
<div class="picsum-img-wrapper">
<img
src="https://images.pexels.com/photos/3048196/pexels-photo-3048196.jpeg?auto=compress&cs=tinysrgb&dpr=2&w=500"
alt="Random second slide" height="600" width="100%" style="object-fit: cover;">
</div>
<div class="carousel-caption">
<h3>Second slide label</h3>
<p>I am Sunil, I can give you cool Frontend Templates and Tips</p>
</div>
</ng-template>
<ng-template ngbSlide>
<div class="picsum-img-wrapper">
<img
src="https://images.pexels.com/photos/6010/sea-beach-holiday-vacation.jpg?auto=compress&cs=tinysrgb&dpr=2&w=500"
alt="Random third slide" height="600" width="100%" style="object-fit: cover;">
</div>
<div class="carousel-caption">
<h3>Third slide label</h3>
<p>Praesent commodo cursus magna, vel scelerisque nisl consectetur.</p>
</div>
</ng-template>
</ngb-carousel>
</section>
The bootstrap carousel component can be accessed using ngb-carousel. Each of the carousel has an ngbSlide attribute.
Tables
We can also work with table as this is one the core component in bootstrap. To use it, we will define some dummy data in our src/app/app.component.ts file:
import { Component } from "@angular/core";
interface Country {
name: string;
flag: string;
area: number;
population: number;
}
const COUNTRIES: Country[] = [
{
name: "Russia",
flag: "f/f3/Flag_of_Russia.svg",
area: 17075200,
population: 146989754,
},
{
name: "Canada",
flag: "c/cf/Flag_of_Canada.svg",
area: 9976140,
population: 36624199,
},
{
name: "United States",
flag: "a/a4/Flag_of_the_United_States.svg",
area: 9629091,
population: 324459463,
},
{
name: "China",
flag: "f/fa/Flag_of_the_People%27s_Republic_of_China.svg",
area: 9596960,
population: 1409517397,
},
];
@Component({
selector: "app-root",
templateUrl: "./app.component.html",
styleUrls: ["./app.component.css"],
})
export class AppComponent {
title = "bootstrap-angular";
countries = COUNTRIES;
}
And then define our template in the src/app/app.component.htm file:
<section>
<div class="container">
<div class="row">
<div class="col-md-12">
<p>Table is just a mapping of objects to table rows with <code>ngFor</code></p>
<table class="table table-striped">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">Country</th>
<th scope="col">Area</th>
<th scope="col">Population</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let country of countries; index as i">
<th scope="row">{{ i + 1 }}</th>
<td>
<img [src]="'https://upload.wikimedia.org/wikipedia/commons/' + country.flag" class="mr-2"
style="width: 20px">
{{ country.name }}
</td>
<td>{{ country.area | number }}</td>
<td>{{ country.population | number }}</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</section>
We can put all our components together to build awesome websites.
You can go on and explore all your Bootstrap components in your application after setting this up.
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