Start:

Load the script:

<script src="c1Use.js">

Example File-structur:

--|
  | c1Use.js
  |
  | jQuery.js
  |
  | jQuery | 
  |        | fn | 
  |             |  velocity.js
  |                
  | JSON.js // JSON-Polyfill                

Asyncron use:

// load jQuery async:
window.c1Use('jQuery', function($) { 

    $('#test').addClass('xy')

});

Syncron use:

// if there is no callback-function, its syncron
window.c1Use('JSON').parse( '{a:1,b:2}' );

The magic addGetter function:

c1Use.addGetter(window, 'JSON'); // JSON-polyfill for old browsers

// now, "JSON" is magicly usable
// the *JSON" poilyfill  is not loaded at this moment!!!
JSON.parse( '{a:1,b:2}' ); 

Make properties (submodules) usable with c1Use:

window.c1Use('jQuery', function($) { // "jQuery" is automaticly usable width c1Use because loaded with c1Use.

    c1Use.able(jQuery, 'fn'); // make "jQuery.fn" usable
    
    c1Use.addGetter( jQuery.fn, 'velocity' );
    // later: in your code
    $('#text').velocity( {color:red} );

})

Multiple depencies:

window.c1Use(['jQuery', 'mytool'], function($, mytool) {
    // use $ and mytool
})

Configuration:

// optional ( fallback is the dir in the scripts-tags src )
window.c1UseSrc = '/url/to/libs';

Licence:

MIT