Monitor every aspect of an object in AngularJS

Within my $scope, I have an object with multiple attributes, like so:

$scope.content = {
     name : 'myname',
     description : 'mydescription',
     keyword : 'some keyword'
}

I am attempting to monitor any changes in each attribute. I tried setting a watch on the object itself, but it did not capture changes made to its individual attributes (which are modified through UI bindings).

$scope.$watch('content', function(){
     // do something
}

However, if I specifically set a watch on a particular attribute, such as the name, then I can track changes for that attribute.

$scope.$watch('content.name', function(){
     // do something
}

Is there a way to listen for changes in all attributes of an object without setting watches on each one individually?

Answer №1

Make sure to utilize the third parameter in your $watch function call for AngularJS:

$scope.$watch('content', function(){
     // do specific tasks here
}, true);

By setting this parameter to true, AngularJS will evaluate the expression for object equality, including properties. If set to false, it will only be evaluated based on reference.

Answer №2

To utilize Equality $watch effectively, we can pass the third argument as true. The API reference specifies that $watch accepts three arguments in the following format:

$watch(watchExpression, listener, [objectEquality]);

If the third argument is set to true, it will monitor all properties within an object.

$scope.$watch("content", function(){}, true);

For additional information on $watch, you may find the following video helpful: https://www.youtube.com/watch?v=IKPrhB8alV4

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