Implements a simple asynchronous loader and module pattern based on dynamic script tags (or load function for command line Javascript). This intended to be loaded before Javascript libraries that use the module pattern, allowing those libraries to interoperate.

Latest version: 1.2

Usage

In you html file:

<script type="text/javascript" src="jsal.comp.js"></script>

<script type="text/javascript">

    // tell JSAL where to find modules that start mylib
    jsal.lib('mylib', '../mylib/src');

    // load mylib and mylib.blah
    jsal.load(['mylib', 'mylib.blah'], function () {
        // ../mylib/src/mylib.js and ../mylib/src/mylib/blah.js are loaded here
    });

    // don't assume they are loaded here - the loader is async

</script>

In your module (JSAL module pattern):

jsal.module({
    name : 'mylib',           // this must match the name used to load it
    depends : ['myotherlib'], // dependencies are automatically loaded
    onload : function () {
        // dependencies are available here
    }
});

API

Function: jsal.lib

Tell JSAL where to load modules within a particular namespace from.

Arguments:

• namespacePrefix - (string/array of strings) prefix(es) of namespaces to load.
• urlPrefix - (string) prefix of the URL to load modules from.

Function: jsal.load

Load a module/modules and run a function when done.

Arguments:

• module - (string/array of strings) module(s) to load.
• callback - (function, optional) callback to run when the module(/modules) is loaded.

Function: jsal.module

Create a new module with the JSAL module pattern.

Arguments:

• opts - (object) options object containing:
• name - (string, required) the module name (must correspond to the filename).
• depends - (array of strings, optional) the modules that this module depends on.
• onload - (function, required) called when the dependencies are loaded. This is where the module implementation is put.

Installation

Copy the file jsal.comp.js to a convenient location (can be inlined if you want to avoid the HTTP request).

Library authors are encouraged to distribute JSAL with their library.

Author

Thomas Yandell

License

The MIT License

Copyright (c) 2008 Thomas Yandell

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.