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Event: Make event dispatch optimizable by JavaScript engines
Closes gh-2834 - Do not assign to function parameters - Do not pass arguments object to other functions
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src/event.js
14
src/event.js
@ -283,19 +283,23 @@ jQuery.event = {
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}
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},
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dispatch: function( event ) {
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dispatch: function( nativeEvent ) {
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// Make a writable jQuery.Event from the native event object
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event = jQuery.event.fix( event );
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var event = jQuery.event.fix( nativeEvent );
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var i, j, ret, matched, handleObj,
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handlerQueue = [],
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args = slice.call( arguments ),
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var i, j, ret, matched, handleObj, handlerQueue,
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args = new Array( arguments.length ),
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handlers = ( dataPriv.get( this, "events" ) || {} )[ event.type ] || [],
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special = jQuery.event.special[ event.type ] || {};
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// Use the fix-ed jQuery.Event rather than the (read-only) native event
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args[ 0 ] = event;
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for ( i = 1; i < arguments.length; i++ ) {
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args[ i ] = arguments[ i ];
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}
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event.delegateTarget = this;
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// Call the preDispatch hook for the mapped type, and let it bail if desired
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