jQuery: noConflict

Question

I just cannot work this out. My god it\'s making my brain hurt, so I turn to you, the good people of the internet.

I\'ve been staring at the documentation for the jQ

Answer 1

WAY late .... but might help someone - threw this together.

/**
*********************************************************************************************************
*           jQuery version check
*           $.noConflict() is not enough to ensure jQuery as well as $ 
*           has correct version (can cause troubles with jQuery plugins that use fn(){}(jQuery);
*
*           useage: restoreJquery('1.10.2',true) //for unminimized dev version
*                   restoreJquery('1.10.2')          //for minimized version
*                   restoreJquery('1.10.2',true,myFunction)          //for minimized version, that executes a function once jQuery is in the page
*
*
**/

function restoreJquery(wantedVersion,devVersion,callback) {
    if(!wantedVersion){
        wantedVersion= '1.10.2';
    }

    //is current jQuery version ===wanted version? (double check to avoid undefined errors)
    if($ && $.fn.jquery!==wantedVersion){                

        //if not invoke noConflict with true (true=gives up the jQuery name space aswell as $)
        var $jQuery = jQuery.noConflict(true); 
        //Line Assign the new object to new instantiated versions of jQuery
        var $=jQuery=$jQuery;                          
      }

    //if jQuery is still not the correct version inject it into page via plain vanilla js

    //if $ does not exist or the version is wrong inject it into the page
    if(!$ || $.fn.jquery!==wantedVersion){ 

        var head=document.getElementsByTagName('head')[0], //get Head
            jqPath=wantedVersion+'jquery.', // ex '1.10.2/jquery.
                    script=document.createElement('script'); //create empty scripttag

            if(devVersion){  //minimized or not?
                jqPath+='min.js';
            }else{
                jqPath+='js';
            }

        script.src='//http://ajax.googleapis.com/ajax/libs/jquery/'+jqPath; //create src path
        script.type='text/javascript'; //add type
        script.async=true; //set async to true
        //real browsers
        script.onload=callback;  //call callback on load

        //Internet explorer doesnt support onload on script (typical ie)
        script.onreadystatechange = function() {
            if (this.readyState == 'complete') {
                callback();
            }
        }


    head.appendChild(script);

    }else{
        //otherwise call the callback since noConflict solved our jQuery versioning issues
        callback();
    }

};