CODEWITHSUNDEEP
javascriptangularjsangularjs-scope
hypno7oad
hypno7oad

Reputation: 1461

In AngularJS, what's the difference between $scope and the native context?

I'm just starting to look at Angular, but having a hard time wrapping my head around the need for $scope. Javascript already has a concept of scope via the context (i.e. this) and allows programmers to inject that context on a function using call or apply.

Are there any differences between Angular's, $scope, and the keyword this?

If there is a difference, then what is the value of this within a controller or directive?

Thanks in advance :)

Upvotes: 2

Views: 693

Answers (1)

calebboyd
calebboyd

Reputation: 5753

Yes, they are not the same at all. The constructor is just an instantiated new ed constructor (the function you wrote) created by the injector.

$scope is more conceptually related to the DOM. In that elements with ng-controller get that $scope and child elements do as well. If a child element with its own scope (controller/directive) had the same properties as the parent scope You wouldn't be able to access them. It also has all of the internal information angular uses in its digest loop (dirty checking/ data binding) like watches,events,etc. I'd have a read through this

As for the myCtrl as syntax, this is nice but all it really does is put the controller instance onto the scope. With the name that you set.

eg myCtrl as foo is basically $scope.foo = myCtrlInstance;. Which you are capable of doing in your controller as well.

Upvotes: 1

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