Fix #13356. Clean up after load/ready handlers. Close gh-1152.

src/core.js

@@ -74,17 +74,25 @@ var
 		return letter.toUpperCase();
 	},
 
-	// The ready event handler and self cleanup method
-	DOMContentLoaded = function() {
-		if ( document.addEventListener ) {
-			document.removeEventListener( "DOMContentLoaded", DOMContentLoaded, false );
-			jQuery.ready();
-		} else if ( document.readyState === "complete" ) {
-			// we're here because readyState === "complete" in oldIE
-			// which is good enough for us to call the dom ready!
-			document.detachEvent( "onreadystatechange", DOMContentLoaded );
+	// The ready event handler
+	completed = function( event ) {
+
+		// readyState === "complete" is good enough for us to call the dom ready in oldIE
+		if ( document.addEventListener || event.type === "load" || document.readyState === "complete" ) {
+			detach();
 			jQuery.ready();
 		}
+	},
+	// Clean-up method for dom ready events
+	detach = function() {
+		if ( document.addEventListener ) {
+			document.removeEventListener( "DOMContentLoaded", completed, false );
+			window.removeEventListener( "load", completed, false );
+
+		} else {
+			document.detachEvent( "onreadystatechange", completed );
+			window.detachEvent( "onload", completed );
+		}
 	};
 
 jQuery.fn = jQuery.prototype = {
@@ -869,18 +877,18 @@ jQuery.ready.promise = function( obj ) {
 		// Standards-based browsers support DOMContentLoaded
 		} else if ( document.addEventListener ) {
 			// Use the handy event callback
-			document.addEventListener( "DOMContentLoaded", DOMContentLoaded, false );
+			document.addEventListener( "DOMContentLoaded", completed, false );
 
 			// A fallback to window.onload, that will always work
-			window.addEventListener( "load", jQuery.ready, false );
+			window.addEventListener( "load", completed, false );
 
 		// If IE event model is used
 		} else {
 			// Ensure firing before onload, maybe late but safe also for iframes
-			document.attachEvent( "onreadystatechange", DOMContentLoaded );
+			document.attachEvent( "onreadystatechange", completed );
 
 			// A fallback to window.onload, that will always work
-			window.attachEvent( "onload", jQuery.ready );
+			window.attachEvent( "onload", completed );
 
 			// If IE and not a frame
 			// continually check to see if the document is ready
@@ -902,6 +910,9 @@ jQuery.ready.promise = function( obj ) {
 							return setTimeout( doScrollCheck, 50 );
 						}
 
+						// detach all dom ready events
+						detach();
+
 						// and execute any waiting functions
 						jQuery.ready();
 					}