Should I use `this` or `$scope`?
Should I use this or $scope?
š¤ When it comes to accessing controller functions in AngularJS, there are two popular patterns: this and $scope. But which one should you use and when? Let's dive in and find out! š”
The this Pattern
š The this pattern is pretty straightforward. In this pattern, you simply define your controller function as an object and assign your functions to it using this.
Let's take a look at an example:
function UserCtrl() {
this.bye = function() { alert('....'); };
}āØ In your HTML, you can then use the "Controller as Var" syntax to access the functions:
<body ng-controller='UserCtrl as uCtrl'>
<button ng-click='uCtrl.bye()'>bye</button>
</body>š Many developers find the this pattern to be easier on the eyes and more natural compared to other JavaScript OO patterns. It's a modern approach that aligns well with ES6 classes.
The $scope Pattern
š¤² The $scope pattern, on the other hand, involves injecting the $scope object into your controller function. You then assign your functions to the $scope object.
Here's an example:
function UserCtrl($scope) {
$scope.bye = function () { alert('....'); };
}š In your HTML, you can directly invoke the function using ng-click:
<body ng-controller='UserCtrl'>
<button ng-click='bye()'>bye</button>
</body>āļø While using $scope is a valid approach, it's important to note that as of AngularJS 1.5+, the recommended best practice is to use the this pattern. The this pattern aligns better with the component-based architecture that AngularJS is moving towards.
Summary and Advice
š To summarize, both patterns are valid options for accessing controller functions. However, if you're using a newer version of AngularJS (1.5+) or embracing the "Controller as Var" syntax, it's highly recommended to use the this pattern.
š” By using the this pattern, you'll be aligning your code with the latest best practices of AngularJS and making your code more readable and maintainable.
š So, next time you find yourself wondering whether to use this or $scope, remember to choose this if you want to stay up to date with AngularJS's evolving standards.
And that's it! We hope this guide has helped you in making an informed decision. What's your experience with this versus $scope? Let us know in the comments below! š
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