Makes sure no unload handler is bound when not in IE. Also simplifies…
… the whole "on unload abort" code. Also avoids the declaration of yet another variables in the jQuery main closure for the temporary XHR used to assess support properties.
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| @@ -1,21 +1,14 @@ | ||
| (function( jQuery ) { | ||
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| var // #5280: next active xhr id and list of active xhrs' callbacks | ||
| xhrId = jQuery.now(), | ||
| xhrCallbacks, | ||
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| // XHR used to determine supports properties | ||
| testXHR; | ||
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| // #5280: Internet Explorer will keep connections alive if we don't abort on unload | ||
| function xhrOnUnloadAbort() { | ||
| jQuery( window ).unload(function() { | ||
| var // #5280: Internet Explorer will keep connections alive if we don't abort on unload | ||
| xhrOnUnloadAbort = window.ActiveXObject ? function() { | ||
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cmcnulty
Contributor
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| // Abort all pending requests | ||
| for ( var key in xhrCallbacks ) { | ||
| xhrCallbacks[ key ]( 0, 1 ); | ||
| } | ||
| }); | ||
| } | ||
| } : false, | ||
| xhrId = 0, | ||
| xhrCallbacks; | ||
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| // Functions to create xhrs | ||
| function createStandardXHR() { | ||
| @@ -45,15 +38,13 @@ jQuery.ajaxSettings.xhr = window.ActiveXObject ? | ||
| // For all other browsers, use the standard XMLHttpRequest object | ||
| createStandardXHR; | ||
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| // Test if we can create an xhr object | ||
| testXHR = jQuery.ajaxSettings.xhr(); | ||
| jQuery.support.ajax = !!testXHR; | ||
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| // Does this browser support crossDomain XHR requests | ||
| jQuery.support.cors = testXHR && ( "withCredentials" in testXHR ); | ||
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| // No need for the temporary xhr anymore | ||
| testXHR = undefined; | ||
| // Determine support properties | ||
| (function( xhr ) { | ||
| jQuery.extend( jQuery.support, { | ||
| ajax: !!xhr, | ||
| cors: !!xhr && ( "withCredentials" in xhr ) | ||
| }); | ||
| })( jQuery.ajaxSettings.xhr() ); | ||
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| // Create transport if the browser can provide an xhr | ||
| if ( jQuery.support.ajax ) { | ||
| @@ -136,7 +127,9 @@ if ( jQuery.support.ajax ) { | ||
| // Do not keep as active anymore | ||
| if ( handle ) { | ||
| xhr.onreadystatechange = jQuery.noop; | ||
| delete xhrCallbacks[ handle ]; | ||
| if ( xhrOnUnloadAbort ) { | ||
| delete xhrCallbacks[ handle ]; | ||
| } | ||
| } | ||
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| // If it's an abort | ||
| @@ -197,15 +190,18 @@ if ( jQuery.support.ajax ) { | ||
| if ( !s.async || xhr.readyState === 4 ) { | ||
| callback(); | ||
| } else { | ||
| // Create the active xhrs callbacks list if needed | ||
| // and attach the unload handler | ||
| if ( !xhrCallbacks ) { | ||
| xhrCallbacks = {}; | ||
| xhrOnUnloadAbort(); | ||
| handle = ++xhrId; | ||
| if ( xhrOnUnloadAbort ) { | ||
| // Create the active xhrs callbacks list if needed | ||
| // and attach the unload handler | ||
| if ( !xhrCallbacks ) { | ||
| xhrCallbacks = {}; | ||
| jQuery( window ).unload( xhrOnUnloadAbort ); | ||
| } | ||
| // Add to list of active xhrs callbacks | ||
| xhrCallbacks[ handle ] = callback; | ||
| } | ||
| // Add to list of active xhrs callbacks | ||
| handle = xhrId++; | ||
| xhr.onreadystatechange = xhrCallbacks[ handle ] = callback; | ||
| xhr.onreadystatechange = callback; | ||
| } | ||
| }, | ||
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Why are you obfuscating your browser sniffing. Better to be honest about it with .browser