What's the difference between different method declarations in JavaScript?

Question

I have seen developers using different ways to declare/define functions in js,

like:

// 1
createview:function()
{

}

// 2.
var createview=function()
{
}

// 3.
function createview()
{
}

While 2nd and 3rd are function expression and declaration respectively, what's with the 1st usage?

the first case is used when you want to assign function as property of object — StateLess, May 15 '14 at 05:45
C'mon guys. This is not duplicate. Without other object notation the answer should be `label` in Javascript. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/label — Herrington Darkholme, May 15 '14 at 05:51
@HerringtonDarkholme That's not correct. An anonymous function cannot be used as a statement (and it would serve no purpose if it could). Pretty sure OP just left the relevant details out. — JLRishe, May 15 '14 at 06:35

score 0 · Answer 1 · answered May 15 '14 at 05:43

Its an object and used for example in the revealing module pattern.

var module = (function() {

  var stuff = function() { return 'stuff'; };

  return {

    stuff: stuff

  }

}());

Now you have a name spaced closure.

module.stuff() //--> returns 'stuff'

1 Answers1