javascript - AngularJS：清除$ watch(AngularJS : Clear $watch)

Question

I have a watch function in my AngularJS application.

(我的AngularJS应用程序中有一个watch功能。)

$scope.$watch('quartzCrystal', function () {
   ...
}

However, after some condition (in my example, changing the page at my single-page application ) I want to stop that watch (as like clearing timeout).

(但是，在某些条件之后（在我的例子中，在我的单页应用程序中更改页面 ）我想要停止该监视（就像清除超时一样）。)

How can I do that?

(我怎样才能做到这一点？)

  ask by kamaci translate from so

Answer 1

$watch returns a deregistration function.

($watch返回注销功能。)

Calling it would deregister the $watcher .

(调用它会取消注册$watcher 。)

var listener = $scope.$watch("quartz", function () {});
// ...
listener(); // Would clear the watch