Dependency Management Got Awesome CommonJS and AMD Compliant dependency loader for modern web apps



require.ensure([dependencies], callbackFunction);

The CommonJS specification allows for an asynchronous download method named require.ensure. It requires an array of dependencies, followed by a callback function. The callback function has the signature

function (require) {}

The only parameter passed to the callback, require, is a local function that can retrieve any of the dependent modules by the name specified in [dependencies].

Ensure Async Dependencies

The primary use of require.ensure is to demand an unknown number of dependencies, and upon completion, map them back into a local scope.

var deps = ['one', 'two', 'three'];
var modules = {};
require.ensure(deps, function (require) {
  for (var i = 0; len = deps.length; i < len; i++) {
    modules[deps[i]] = require(deps[i]);

  // modules now contains the exports of all the dependencies, mapped to their name
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