--- title: "\"this\" vs $scope in AngularJS controllers" description: "\"this\" vs $scope in AngularJS controllers" author: "Revati S Misra" published: 2024-06-17 updated: 2024-06-17 canonical: https://www.mindstick.com/forum/160747/this-vs-scope-in-angularjs-controllers category: "angular js" tags: ["javascript", "angular js", "angularjs scope"] reading_time: 3 minutes --- # "this" vs $scope in AngularJS controllers Explain the 'this' vs $scope in AngularJS controllers. ## Replies ### Reply by Ashutosh Patel ### Difference Between ‘This’ and ‘$scope’ Understanding the difference between this and [$scope](https://www.mindstick.com/forum/160755/difference-between-rootscope-and-scope-in-angularjs) in controllers in AngularJS is important for properly managing data and behavior in your application. Here is a detailed comparison between **this** and **$scope,** #### $scope **Definition- $scope** is an object provided by AngularJS that acts as a reference to the application's data. It acts as a bridge between the **controller** and the **view**. ## Usage - Controllers in traditional AngularJS (pre-AngularJS 1.5) mostly use **$scope** to expose data and functions in the **view**. - **$scope** allows you to define automatic properties and functions for corresponding view templates. ## Example- ```javascript $Scope example

``` ## In the example above `$scope.message`and `$scope.sayHello()` are accessible in the corresponding **HTML template**. **Digest Cycle-** **$scope** is an important part of the AngularJS digest cycle, where AngularJS checks for changes to **$scope** properties and updates the **view** accordingly. **Inheritance-** **$scope** is a structure in which **child** managers inherit from their **parent** scope, and allows data to be shared between components. #### “this” Translation: This refers only to the controller instance, not the scope object. This is a basic JavaScript concept used in object-oriented programming. ## Usage - With the introduction of **AngularJS 1.2** and later, using this (**controllerAs** syntax) as a replacement for **$scope** became popular. - It is used to expose properties and methods directly on the controller instance, making it more like a traditional object-oriented programming exercise ## Example- ```javascript this Scope Example

``` ## In the example above `this.message` and `this.sayHello()` are accessible in the associated HTML template when using **controllerAs** syntax. #### #### \ Choosing between “$scope” and “this” \ **Legacy vs. Modern Approach** For older AngularJS codebases or smaller applications `$scope` is perfectly practical and widely used.\ For larger applications or other projects, `this`is often preferred with the **controllerAs** syntax due to its clarity and compatibility with modern JavaScript practices.\ **Migration** AngularJS provides ways to gradually move the **controllerAs** syntax out of the `$scope` implementation. Tools like `ng-controller` and `ng-bind` also support `$scope`.\ **consistency** Whichever method you choose, consistency in the business is important. Stick to `$scope` or `this`throughout the application to maintain code readability and reduce confusion. **Also, Read:** [Explain the concept of "scope" in AngularJS](https://www.mindstick.com/forum/160746/explain-the-concept-of-scope-in-angularjs) --- Original Source: https://www.mindstick.com/forum/160747/this-vs-scope-in-angularjs-controllers Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.