How to Build a Single Page Application with Angular - 2021

Websites have improved steadily since the advent of the World Wide Web. From simple HTML pages with little CSS design to websites capable of streaming 8K video with expected cache intervals, machine learning algorithms provide a seamless streaming experience.

Front-end frameworks have been a significant advancement in terms of online interactions. In this post, we'll discuss how to build a Single Page Application with AngularJS. Google created Angular and it is now written in TypeScript. A decent way to migrate to Angular is to utilize AngularJS, which is written in JavaScript and employs simple ideas.

Table of Contents

• What is a Single Page Application (SPA)?

• Advantages of Single Page Applications

• Why Use AngularJS to Create a SPA?

• How to Create a Single-Page Application with AngularJS?

What is a Single Page Application (SPA)?

Gmail is an excellent example of a SPA. On the left, you'll find all of your tabs, such as Inbox, Spam, and Snoozed, which do not refresh the current page but rather alter a specific section of it. Similarly, when you click on an email in your inbox, it opens in a specific section rather than refreshing the entire website.

Advantages of Single Page Applications

• Enhancing the user experience.

• Web sites update more quickly since less bandwidth is consumed.

• The application - index.html, CSS bundle, and javascript bundle – becomes easier to deploy in production.

• Splitting the code into different pieces is possible.

Note: If you would like to Enrich your career as a AngularJS certified professional, then visit MindMajix– A Global online training platform for “AngularJS Training”.

Why Use AngularJS to Create a SPA?

There are several JavaScript apps available on the market today, including ember.js, backbone.js, and others. However, many online apps include AngularJS in their development process in order to generate SPAs.

The following are a few reasons why AngularJS is the clear winner:

There Are No Dependencies

In comparison to AngularJS, backbone.js requires underscore.js and jQuery. member JS, on the other hand, is dependent on handlebars and jQuery.

Scheduling

When contrasted to other JavaScript frameworks, navigating between AngularJS-built web pages is quite straightforward. Since the directives in AngularJS are lightweight, the performance measurements of AngularJS are rather impressive.

Evaluation

Once the application is constructed using AngularJS, selenium may be used to do automated testing for quality assurance. That's one of the greatest advantages of apps developed using AngularJS.

Data Consolidation

AngularJS enables two-way data binding, which means that if the model is modified, the view is updated as well, as AngularJS is MVC-based. As a result, the user can see the data according to his choices.

Browser Support

AngularJS is supported by the majority of browsers, including Internet Explorer 9 and later. It is also adaptable to function on mobile devices, tablets, and computers.

Adaptability

AngularJS is agile, which means it can respond to new business needs as they arise in competitive work contexts. To satisfy these requests, controllers may be developed using the MVC architecture.

Approximately 30000 modules are included in AngularJS, making it ideal for quick application development. When a developer wishes to personalize an existing program, he can do it by utilizing pre-built modules and tweaking the code rather than starting from scratch.

Further, because the contributors and specialists in AngularJS are many, you will receive prompt solutions to any questions you ask on discussion boards.

How to Create a Single Page Application with AngularJS?

Step 1: Create a Module

We are all aware that AngularJS adheres to the MVC framework. As a result, each AngularJS application comprises a module that contains controllers, services, and so on

Step 2: Define a Simple Controller

Step 3: Incorporate the AngularJS script into your HTML code

In the ng-app property, specify the module (made in step 1) and the controller (specified in step 2), respectively.

<!doctype html>
<html ng-app="myApp">
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
</head>
<body ng-controller="FirstController">
<h1>{{message}}</h1>
<script src="app.js"></script>
</body>
</html>

Step 4: Utilize AngularJS's routing features to extend the SPA with more views

After the main angular script, we need to add the angular-route script

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular-route.js"></script>


To enable routing, we must utilize the ngRoute directive.

var app = angular.module('myApp', ['ngRoute'])

Step 5: Design the website's HTML layout

After creating an HTML layout for the website, we'll use the ng-view directive to define the location of the HTML for each page in our layout

<!doctype html>
<html ng-app="myApp">
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular-route.js"></script>
</head>
<body>
<div ng-view></div>
<script src="app.js"></script>
</body>
</html>

Step 6: Using the ngRoute module's $routeProvider service, set the navigation to various views

Each route that we intend to add requires a templateUrl and a controller. When a user attempts to browse to a route that does not exist, exception handling must be provided. To keep things simple, we may create an "otherwise" function that will take the user to the "/" route

var app = angular.module('myApp', ['ngRoute']);
app.config(function($routeProvider) {
$routeProvider
.when('/', {
templateUrl : 'pages/first.html',
controller : 'FirstController'
})
.when('/blog', {
templateUrl : 'pages/second.html',
controller : 'SecondController'
})
.when('/about', {
templateUrl : 'pages/third.html',
controller : 'ThirdController'
})
.otherwise({redirectTo: '/'});
});

Step 7: Create controllers for each of the paths listed in the $routeProvider variable

app.controller('FirstController', function($scope) {
$scope.message = 'Hello from FirstController';
});
app.controller('SecondController', function($scope) {
$scope.message = 'Hello from SecondController';
});
app.controller('ThirdController', function($scope) {
$scope.message = 'Hello from ThirdController';
});

Step 8: Configure the pages

first.html

<h1>First</h1>
<h3>{{message}}</h3>

second.html

<h1>Second</h1>
<h3>{{message}}</h3>

third.html

<h1>Third</h1>
<h3>{{message}}</h3>

Step 9: Include hyperlinks in the HTML to facilitate navigation to the preset pages

<!doctype html>
<html ng-app="myApp">
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular-route.js"></script>
</head>
<body>
<a href="#/">First</a>
<a href="#/second">Second</a>
<a href="#/third">Third</a>
<div ng-view></div>
<script src="app.js"></script>
</body>
</html>

Step 10: Using the script element, include the HTML for the routing pages in the index.html file

<!doctype html>
<html ng-app="myApp">
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular-route.js"></script>
</head>
<body>
<script type="text/ng-template" id="pages/first.html">
<h1>First</h1>
<h3>{{message}}</h3>
</script>
<script type="text/ng-template" id="pages/second.html">
<h1>Second</h1>
<h3>{{message}}</h3>
</script>
<script type="text/ng-template" id="pages/third.html">
<h1>Third</h1>
<h3>{{message}}</h3>
</script>

<a href="#/">First</a>
<a href="#/second">Second</a>
<a href="#/third">Third</a>

<div ng-view></div>

<script src="app.js"></script>
</body>
</html>

AngularJS Directives to developers to start Angular application development

Attributes are  used in AngularJS to extend the capabilities of HTML. AngularJS comes with builtin directives that help the inefficient functioning of your applications. In AngularJS we can customize the directives according to the requirements of our application.

Most of the directives in AngularJS will start with ng-. ng stands for AngularJS.

The below-mentioned table contains a list of important built-in AngularJS directives.

AngularJs Eevents

Ng-blur     
ng-change
ng-click
ng-copy
ng-cut     
ng-dblclick
ng-focus     
ng-key down
ng-keypress     
ng-key up
ng-mouse down     
ng-mouseenter
ng-mouse leave     
ng-mousemove
ng-mouseover     
ng-mouse up
ng-paste

AngularJS Services

• $anchorScroll     
• $exceptionHandler     
• $interval     
• $rootScope
• $cacheFactory     
• $httpParamSerializer     
• $location     
• $sce
• $compile     
• $http     
• $parse     
• $timeout
• $document     
• $interpolate     
• $rootElement     
• $sceDelegate
• $animate     
• $filter     
• $locale     
• $templateRequest
• $templateCache     
• $httpParamSerializerJQLike     
• $log     
• $window
• $controller     
• $httpBackend     
• $q

Conclusion:

That is all! We hope you were able to develop a basic SPA similar to the one presented in this blog. After successfully obtaining the result, you may experiment with more sophisticated SPAs along the same lines. To know more about AngularJS, please checkout AngularJS Tutorial

Content Author: I am Anita Basa, an enthusiastic Digital Marketer and content writer working at Mindmajix.com. I wrote articles on trending IT-related topics such as Microsoft Dynamics CRM, Oracle, Salesforce, Cloud Technologies, Business Tools, and Software. You can reach me on Linkedin: Anita Basa