Is this the return expression in the _.delay underscore.js function extraneous?

This is the code for _.delay

:

// Delays a function for the given number of milliseconds, and then calls
// it with the arguments supplied.
_.delay = function(func, wait) {
  var args = slice.call(arguments, 2);
  return setTimeout(function() {
    return func.apply(null, args);
  }, wait);
};

      

        
        
        
      

    

The first statement return

before is setTimeout

definitely useful because it returns timeoutID

, which you can use to cancel the timer. No questions.

However, I don't see how an operator return

inside a function passed to setTimeout

can have any effect since it setTimeout

is asynchronous. Is this an internal expression by an return

outsider?

To access this asynchronous result, a promise or similar construct must be registered.

underscore.js

- a well polished library that tries to limit the number of bytes; therefore, it seems strange that such an external statement would be present.