javascript - What is Angular.noop used for?

Question

I have tried searching it everywhere even on Angular.org documentation but couldn't find any detailed explanation with implementation. It would be hugely helpful if any could explain it.

Answer 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);