AngularJS Built-in helper Functions angular.noop
Example
The angular.noop is a function that performs no operations, you pass angular.noop when you need to provide a function argument that will do nothing.
angular.noop()
A common use for angular.noop can be to provide an empty callback to a function that will otherwise throw an error when something else than a function is passed to it.
Example:
$scope.onSomeChange = function(model, callback) {
updateTheModel(model);
if (angular.isFunction(callback)) {
callback();
} else {
throw new Error("error: callback is not a function!");
}
};
$scope.onSomeChange(42, function() {console.log("hello callback")});
// will update the model and print 'hello callback'
$scope.onSomeChange(42, angular.noop);
// will update the model
Additional examples:
angular.noop() // undefined
angular.isFunction(angular.noop) // true
