CODEWITHSUNDEEP
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Lai32290
Lai32290

Reputation: 8548

How to $apply() if not using $scope in Angular?

In my application, I'm using this instead of $scope to save variables and functions, and using controller alias in the HTML to access.

In this case, how to can I update my view, do something like $digest() or $apply() of $scope?

Or is necessary inject $scope to do this?

Upvotes: 0

Views: 79

Answers (2)

lenilsondc
lenilsondc

Reputation: 9800

The controllerAs way have nothing to do with $scope in the controller. It's a pattern to avoid contact between $scope and the template and also improve readability. However, even though you are using controllerAs syntax, you can inject $scope on your controller with no problems. That's what controllerAs is about, use the $scope for propper tasks such as $scope.$apply, but not as a view model.

It's not a bad practice injecting the $scope even though you're using controllerAs. But it would be a bad practice if you use $scope to work like a view model. Anyhow, even if you don't inject, $scope will exists somehow in the controller internals, it's part of a controller. The aproach of controllerAs is to separate the role of view model from the $scope. In the end the view model become a part of the scope but it's isolated from the rest of $scope's features.

Upvotes: 1

Zach
Zach

Reputation: 3207

@Lai32290 Good job adopting the controllerAs convention! It saves on headaches and makes things much clearer with nested scopes! As for your question, you cannot avoid the use of $scope for the purposes of calling $digest or $apply. Remember though that behind the scenes, angularjs still attaches your controllerAs to the $scope, so it's still there.

You'll need to use it when events occur outside of angular's lifecycle - such as with sockets or events from other external libaries.

http://www.codelord.net/2015/11/11/angular-controlleras-when-should-you-use-scope/

Upvotes: 1

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