CODEWITHSUNDEEP
angularjsangularjs-scope
Abraham P
Abraham P

Reputation: 15471

How often does angular js poll functions passed under $watch

If I were to create a $watch expression like:

         $scope.$watch(function(){
              return(MyDataStore.someInstanceVariable);}
          , function(newVal, oldVal){
               $scope.scopeVariable = newVal;}
          , true)

How often would this function execute? How often would it poll the data store? Just how (in)efficient is this approach?

Upvotes: 0

Views: 641

Answers (1)

Nir
Nir

Reputation: 483

From the angularjs docs:

The watchExpression is called on every call to $digest() and should return the value which will be watched. (Since $digest() reruns when it detects changes the watchExpression can execute multiple times per $digest() and should be idempotent.)

See the docs at: Angularjs Watch

Upvotes: 1

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