What is the use of angular.noop in Angular 1.*?

angular.noop is an empty function that can be used as a placeholder when you need to pass some function as a param. function foo (callback) { // Do a lot of complex things callback(); } // Those two have the same effect, but the later is more elegant foo(function() {}); foo(angular.noop);

A function that performs no operations. function method(callback) { var result = calculateResult(); (callback || angular.noop)(result); } method(angular.noop); // no callback method(alert(result)); // alert is a callback and alerts result Useful in situations where we do not require a callback after doing some operation.