/ Published in: jQuery
When injecting via jQuery HTML content which contains script tags referencing external scripts, which are then referenced via scripting elsewhere in the injected HTML, some browsers (Chrome) will not wait for the external scripts to load causing the internal scripts to throw an error. This code parses the external script tags, loads them seperately and then calls the callback function passing the given HTML minus the external script tags for you to inject.
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UPDATE: I've made this considerably more complex after some IE problems (really!). Hope it helps someone out...
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UPDATE: I've made this considerably more complex after some IE problems (really!). Hope it helps someone out...
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/** * Parse the external scripts and append them to the document seperately. * * Ensures external libs are fully loaded prior to any script on the supplied html * The callback is give the html minus the previously injected external script tags. * * @param html Source HTML content or jquery object * @param callback Function to call passing the modifed jquery HTML reference */ loadContentScripts: function ( html, callback ) { // Grab the external script tags and strip from the html var workingHtml = $(html); var scripts = workingHtml.filter( 'script[src$=".js"]' ).clone(); var v = this; // If no scripts then just callback if ( scripts.length == 0 ){ callback( html ); return this; } // Otherwise strip the scripts from the HTML html = workingHtml.not( 'script[src$=".js"]' ); // Gather the script names for later as .data doesnt seem to work well var scriptLoadMap = new Array(); scripts.each( function ( i, ele ) { scriptLoadMap[ $(ele).attr( 'src' ) ] = false; }); // Add them seperately and set the callback scripts.appendTo( 'body' ); // Handler to check whether all scripts have been loaded var done = false; var handler = function ( e ){ var loadedSrc = $( e.currentTarget ).attr( 'src' ); if ( typeof( scriptLoadMap[ loadedSrc ] ) == 'undefined' ) return; // Set this one to true scriptLoadMap[ loadedSrc ] = true; // Check whether they've all loaded var allLoaded = true; scripts.each( function ( i, ele ) { src = $(ele).attr( 'src' ); allLoaded = allLoaded && scriptLoadMap[ src ]; }) // Call the CB if all are loaded if ( allLoaded && !done ){ callback( html ); done = true; //only call once } }; // IE compat event checking for a script's load // This grabs all the pages scripts but thanks to our handler thats ok $('script[src$=".js"]').load( handler ).each( function(){ var thisSrc = $( this ).attr( 'src' ); // Don't bother unless its in out list if ( typeof( scriptLoadMap[ thisSrc ] ) == 'undefined' ) return; // In case already loaded (like by cache), trigger manually if ( this.complete ) $( this ).trigger( 'load' ); // Special case for IE else if ( $.browser.msie ){ this.onreadystatechange = function () { if ( this.readyState == "loaded" || this.readyState == 'complete' ) // ie8 = loaded. 'complete' just in case... $( this ).load(); }; } // HKS Hack // Set a timeout period before we force the load, in case browser is acting up (eg. IE) window.setTimeout( $.proxy( function () { if ( done ) return; // see above // Tell GA v._tracker.trackEvent( 'Errors', 'Script Timeout', thisSrc ); if ( CONFIG.DEBUG ) console.log( 'Script Load has timed out (' + CONFIG.SCRIPT_LOAD_TIMEOUT+'ms) for file "' + $(this).attr('src') + '". Triggering load manually...' ); if ( $.browser.msie ) this.onreadystatechange = null; $( this ).load(); // triggers event }, this ), CONFIG.SCRIPT_LOAD_TIMEOUT ); }); return this; } // USAGE: var CONFIG = { SCRIPT_LOAD_TIMEOUT: 5000, DEBUG: 0 } var html = 'Some html containing external scripts <script src="..."'; var container = $( '#content' ); var newContent = $( '<DIV>'+html+'</DIV>' ); loadContentScripts( newContent, function ( resultHtml ){ container.append( resultHtml ); } );