Asynchronous CommonJS-like Module Loader for web-browsers.
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SandboxJS @ 9d00b2c


Asynchronous CommonJS Module Loader for web-browsers.

This script allows the use of "modules" within your JavaScript (usually web application).

It uses SandboxJS underneath the hood in order to execute modules within their own, isolated, JavaScript scope. This means that executed modules do NOT have access to the global window or document objects, unless the page author explicitly allows it.

Writing a Module

A "module" is simply a JavaScript file that exports objects (i.e. functionality) for other modules to use.

A top-level module doesn't depend on any other modules, and simply assigns properties to the global exports object for others to use:

// foo.js
exports.upper = function(str) { return str.toUpperCase(); }

Any other module that depends on other modules MUST use the module.load() function to explicity specify which modules it depends on. The exports of the required modules are passed in as arguments:

// bar.js
module.load('./foo', function(foo) {
    // "TEST"

In the case of bar.js, the callback ("factory") function won't be executed until after the dependency list has been satisfied.

The "main" module

Accessible as module.main; the "main" module is everything that your export in the global scope. Since by default your module has no access to anything except JavaScript primitives, you might want to export some hooks into your web app in the global scope (custom logging, etc.).

To load other modules, module.load! This may be done in an inline <script> block or a standalone 'main' module (i.e. a <script src="main.js">, note the name isn't important). A standalone module would be different in the sense that it still is part of the regular brower global scope.

So to complete the foo.js/bar.js example above, this would be a basic index.html:

    <script type="text/javascript" src="Sandbox.js"></script>
    <script type="text/javascript" src="Module.js"></script>
    <script type="text/javascript">

      module.load('./bar', function(bar) {