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最新评论
Many browsers, especially Internet Explorer, miss out on a number of the W3C event object properties
and methods. The only reasonable way to work around this is to create a new object that simulates the
browser's native event object, fixing issues on it where appropriate (it's not always possible to modify the existing object, many properties can't be overwritten).
The details of what to fix is embedded in the comment itself. please have a read.
/************************************** *@Name: expandoattr.js *@Summary * Many browsers, expecialy Internet explorerr, miss out a number of W3C event object * proeprties and methods, The only reasonale way to wrk this is to create a new object that simulate * the browse's native event object. fixing issues on it where appropriate (it's not always possible to modify the * existing object, many properties can't be overwritten). * * some uniformly named * .target - the commonly-use property denoting the original source of the event, IE frequently stores this in .srcElement * .relatedTarget - relatedTargt comes into the use when it's used on an event in conjunction with another element (such as "mouseover" or "mouseout"). The .toElement and .fromElement are IE's counterparts * .preventDefault - dosn't exist in the IE implementaion , which would normally prevetnt the default browser acton from occuring, instead the .returnValue property needs to be set to false * .stopPropagation() - alsoes does not exit, which would normally stop the event from bubbling further up the treee, setting the .canceBubble property to true will make this happen * .pageX() - page X and pageY does not exist in IE (provide he position of the mouse relative to the while document) but can be easily duplicated using other information (clientX/Y provides the position of the mouse relative to teh window * of the document, and clientTop/Left gives the offset of the document itself - combining these value will give you the final pageX/Y values). * .pageY() * .which - .is equivalent to the key code pressed duing a keyboard event, this cn be duplicated by accessing the .charCode and the .keyCode properties * .button - matches the mouse button clicked by the user on a mouse event. Internet explorer uses a bitmask (1 for left client, 2 for right click for middle click) so it needs to be converted to their equivalent values (1, 2,3 ) * . * @todo: * Test ***************************************/ function fixEvent(event) { if (!event || !event.stopPropagation) { var old = event || window.event; // Clone the old object so that we can modify the values event = {}; for (var prop in old) { event[prop] = old[prop]; } // The event occurred on this element if (!event.target) { event.target = event.srcElement || document; } // Handle which other element the event is related to event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement; // Stop the default browser action event.preventDefault = function () { event.returnValue = false; event.isDefaultPrevented = returnTrue; }; event.isDefaultPrevented = returnFalse; // Stop the event from bubbling event.stopPropagation = function () { event.cancelBubble = true; event.isPropagationStopped = returnTrue; }; event.isPropagationStopped = returnFalse; // Stop the event from bubbling and executing other handlers event.stopImmediatePropagation = function () { this.isImmediatePropagationStopped = returnTrue; this.stopPropagation(); }; event.isImmediatePropagationStopped = returnFalse; // Handle mouse position if (event.clientX != null) { var doc = document.documentElement, body = document.body; event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0); event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0); } // Handle key presses event.which = event.charCode || event.keyCode; // Fix button for mouse clicks: // 0 == left; 1 == middle; 2 == right if (event.button != null) { event.button = (event.button & 1 ? 0 : (event.button & 4 ? 1 : (event.button & 2 ? 2 : 0))); } } return event; function returnTrue() { return true; } function returnFalse() { return false; } }
发表评论
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javascript - trick to cross browser DOM ready event
2012-08-24 08:23 901the "ready" event ... -
javascript - trick to simulate mouseenter and mouseleave
2012-08-23 08:31 2228Previously we discussed javasc ... -
javascript - trick to simulate the change event
2012-08-22 08:51 1611In the previous discussion a ... -
javascript - trick to simulate bubbling submit event
2012-08-22 08:03 883In the previous discussion abou ... -
javascript - trick to implement bubbling submit event
2012-08-23 07:55 670Following up to the javascrip ... -
javascript - trick to detect bubbling supportability
2012-08-20 22:22 932Event delegation is oe of the b ... -
javascript - trigger event and custom events
2012-08-20 21:58 2045In the previous post - javascri ... -
javascript - trick to handlers management
2012-08-20 08:19 995We have discussed "javascr ... -
javascript - trick to centralized store
2012-08-20 07:52 785For a number of reasons it's ... -
javascript - tricks to deal with colors
2012-08-15 08:34 742There are a couple of ways to r ... -
javascript - trick to manipulate the opacity
2012-08-15 08:26 744All other browsre may have supp ... -
javascript - trick to test visibility of an element
2012-08-15 08:15 497though there is a visible prope ... -
javascript - trick to get and set height and width
2012-08-15 08:05 519when looking at properties t ... -
javascript - trick to set/get attributes that expects px values
2012-08-16 11:00 494When setting a number into a ... -
javascript - trick to get and set CSS style
2012-08-16 11:00 718while it will not be so much tr ... -
javascript - trick to normalize href for IE
2012-08-16 10:59 507IE is again the only browser th ... -
javascript - trick IE form and its expando attribute
2012-08-16 10:59 1008there is a known issue that if ... -
javascript expando and attributes
2012-08-14 08:15 1010expando is something like this ... -
javascript - trick to getText and setText
2012-08-14 07:40 1105it is not as simple as you thin ... -
javascript - trick/guideline to remove DOM element
2012-08-14 07:00 1156remove an element is not as sim ...
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