AngularJS Expression
AngularJS, the predecessor of Angular, introduced the concept of expressions as a way to bind dynamic data to HTML templates. AngularJS Expressions are written within double curly braces {{ }} and are evaluated by the framework to generate values displayed in the UI. These expressions are based on JavaScript and can include variables, function calls, operators, and literals.
Syntax:
In the below syntax, the msg variable is defined in the AngularJS controller and its value will be displayed in the <p> element.
<p>
{{ mymsg }}
</p>
Example: Below example demonstrates the usage of expressions in the Angular JS application.
HTML
<!DOCTYPE html> <html ng-app="myApp"> <head> <title> Angular JS Expression </title> <script src= "https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"> </script> </head> <body> <div ng-controller="MyCtrl"> <h1 style="color: green"> w3wiki </h1> <h2>AngularJS Expressions </h2> <p>{{ mymsg }}</p> </div> <script> angular.module('myApp', []) .controller('MyCtrl', function ($scope) { $scope.mymsg = 'Welcome to w3wiki!'; }); </script> </body> </html> |
Output:
Difference between AngularJS Expression and Angular Expression
AngularJS is a JavaScript-based framework that can be used by adding it to an HTML page using a <script> tag. AngularJS helps in extending the HTML attributes with the help of directives and binding of data to the HTML with expressions. Angular on the other hand is a client-side TypeScript-based, front-end web framework by Google.
Angular is a great, reusable UI (User Interface) library for developers that help in building attractive, and steady web pages and web application.
An Expression in Angular or Angular JS is a code snippet that can be simple or complex JavaScript-like code, like, the variable references, function calls, operators, and filters, etc, written within double curly braces {{ }} in order to evaluate & display dynamic values or perform calculations in the template.
In this article, we will learn about Angular Expression & Angular JS Expression, their implementations & the difference between them.
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