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I have a watch function in my AngularJS application.
$scope.$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).
How can I do that?
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When you invoke the $watch() method, to create a binding, AngularJS returns a "deregistration" function. This function can then be used to unbind your $watch() listener - all you have to do is invoke this returned function and your $watch() listener will be removed.
$watch() function is used to watch the changes of variables in $scope object. Generally the $watch() function will create internally in Angularjs to handle variable changes in application. Let us understand with the following example to understand how to implement $watch().
The $watch keep an eye on the variable and as the value of the variable changes the angular JS $what runs a function. This function takes two arguments one is the new value and another parameter is the old value.
$watch returns a deregistration function. Calling it would deregister the $watcher.
var listener = $scope.$watch("quartz", function () {}); // ... listener(); // Would clear the watch If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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