How to Build a Single Page Application with Angular - 2021
Last updated Nov 13, 2021Websites 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)?
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
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Enhancing the user experience.
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Web sites update more quickly since less bandwidth is consumed.
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The application - index.html, CSS bundle, and javascript bundle – becomes easier to deploy in production.
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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
var app = angular.module('myApp', []); |
Step 2: Define a Simple Controller
app.controller('FirstController', function($scope) { $scope.message = 'Hello from FirstController'; });
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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.
Directive | Description |
ng-init | Initializes AngularJS variables |
ng-app | Auto bootstrap AngularJS application |
ng-controller | Attaches the controller of MVC to the view. |
ng-model | Binds HTML control’s value to a property |
ng-bind | It replaces the HTML value with the specified AngularJS expression |
ng-show | It displays the elements based on the values of the specified expression. |
ng-repeat | Repeats the HTML template once per item. |
ng-read only | It makes HTML element read-only based on the specified expression |
ng-if | Removes and re-creates the HTML element based on the given expression |
ng-disabled | It sets the disabled attribute on the HTML element if the specified expression is true. |
ng-click | Displays custom behavior when you click on an element |
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
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