Created
September 18, 2010 17:11
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/* Cachey jQuery Plugin | |
* | |
* A collaboration between: | |
* | |
* Ross Davidson - draggor@gmail.com | |
* Jeremy Kahn - jeremyckahn@gmail.com | |
* Ben Mills - ben@bmdev.org | |
* | |
* To use, simply load this script after you load jQuery. As elements are selected, they are cached. | |
* When they are called again, the cached reference is called automatically, there is no DOM traversal. | |
* Usage is completely transparent, just load this file and your apps will go faster. :) | |
*/ | |
jQuery(function(){ | |
setTimeout(function(){ | |
(jQuery.fn.cachey = function() { | |
jQuery.noConflict(); | |
// Cache Holder | |
window.cachey_cache = {}, | |
$ = function(sel, context) { | |
/** | |
* Do not execute caching logic if: | |
* | |
* 1. sel isn't a selector. | |
* | |
* 2. A context was provided. Logic needed to account for that would slow down the plugin overall, and contexts are provided as a performance boost anyways, so caching it would yield diminishing returns. | |
* | |
* 3. sel is actually a new HTML element (The regexp was taken from the jQuery source for a similar purpose) | |
*/ | |
if(typeof sel !== 'string' | |
|| context | |
|| /^[^<]*(<[\w\W]+>)[^>]*$|/.exec(sel)[1]) { | |
return jQuery(sel, context); | |
} | |
if (cachey_cache[sel]) { | |
// If selector exists, return the cached version. | |
return cachey_cache[sel]; | |
} else { | |
// Otherwise return the selected object and add it to the cache holder. | |
return cachey_cache[sel] = jQuery(sel, context); | |
} | |
}; | |
// Attach all jQuery utility functions to the new $ object | |
for(k in jQuery) { | |
$[k] = jQuery[k]; | |
} | |
// Give $ (not the jQuery object) the ability flush the cache | |
$.flush = function(){ | |
window.cachey_cache = {}; | |
}; | |
})() | |
}, 0); | |
}); |
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