What is define([ , function ]) in JavaScript? [duplicate]

Question

This question already has answers here:

What is 'define' used for in JavaScript (aside from the obvious)? (2 answers)

Closed 8 years ago.

I see this being used all the time in JavaScript:

define(['param1', 'param2'], function() {

});

What is the define function?

Answer 1

define() is part of the AMD spec of js

See:

• https://github.com/amdjs/amdjs-api/wiki/AMD

Edit: Also see Claudio's answer below. Likely the more relevant explanation.

Answer 2

That's probably a requireJS module definition

Check here for more details

RequireJS is a JavaScript file and module loader. It is optimized for in-browser use, but it can be used in other JavaScript environments, like Rhino and Node. Using a modular script loader like RequireJS will improve the speed and quality of your code.