Posted in Javascript onDecember 24, 2009
绑定事件
var addEvent = function( obj, type, fn ) { if (obj.addEventListener) obj.addEventListener( type, fn, false ); else if (obj.attachEvent) { obj["e"+type+fn] = fn; obj.attachEvent( "on"+type, function() { obj["e"+type+fn](); } ); } };
另一个实现
var addEvent = (function () { if (document.addEventListener) { return function (el, type, fn) { el.addEventListener(type, fn, false); }; } else { return function (el, type, fn) { el.attachEvent('on' + type, function () { return fn.call(el, window.event); }); } } })();
绑定onpropertychange事件
onpropertychange是微软制造的一个事件,它在一个元素的属性发生变化的时候触发,常见的有文本的长度改变,样长改变等,FF大致和它相似的属性为oninput事件,不过它只针对textfield与textarea的value属性。safari,firefox,chrome与 opera都支持此属性。
var addPropertyChangeEvent = function (obj,fn) { if(window.ActiveXObject){ obj.onpropertychange = fn; }else{ obj.addEventListener("input",fn,false); } }
移除事件
var removeEvent = function( obj, type, fn ) { if (obj.removeEventListener) obj.removeEventListener( type, fn, false ); else if (obj.detachEvent) { obj.detachEvent( "on"+type, obj["e"+type+fn] ); obj["e"+type+fn] = null; } };
加载事件
var loadEvent = function(fn) { var oldonload = window.onload; if (typeof window.onload != 'function') { window.onload = fn; }else { window.onload = function() { oldonload(); fn(); } } }
阻止事件
var stopEvent = function(e){ e = e || window.event; if(e.preventDefault) { e.preventDefault(); e.stopPropagation(); }else{ e.returnValue = false; e.cancelBubble = true; } }
如果仅仅是阻止事件冒泡
var stopPropagation = function(e) { e = e || window.event; if (!+"\v1") { e.cancelBubble = true; } else { e.stopPropagation(); } }
取得事件源对象
相当于Prototype.js框架的Event.element(e)
var getEvent = function(e){ e = e || window.event; var target = event.srcElement ? event.srcElement : event.target; return target }
或者这个功能更强大,我在开发datagrid时开发出来的,详细用法见《一步步教你实现表格排序(第二部分)》。
var getEvent = function(e) { var e = e || window.event; if (!e) { var c = this.getEvent.caller; while (c) { e = c.arguments[0]; if (e && (Event == e.constructor || MouseEvent == e.constructor)) { break; } c = c.caller; } } var target = e.srcElement ? e.srcElement : e.target, currentN = target.nodeName.toLowerCase(), parentN = target.parentNode.nodeName.toLowerCase(), grandN = target.parentNode.parentNode.nodeName.toLowerCase(); return [e,target,currentN,parentN,grandN]; }
最后附上DOM3.0事件的一览表
type | Bubbling phase | Cancelable | Target node types | DOM interface |
---|---|---|---|---|
DOMActivate | Yes | Yes | Element | UIEvent |
DOMFocusIn | Yes | No | Element | UIEvent |
DOMFocusOut | Yes | No | Element | UIEvent |
focus | No | No | Element | UIEvent |
blur | No | No | Element | UIEvent |
textInput | Yes | Yes | Element | TextEvent |
click | Yes | Yes | Element | MouseEvent |
dblclick | Yes | Yes | Element | MouseEvent |
mousedown | Yes | Yes | Element | MouseEvent |
mouseup | Yes | Yes | Element | MouseEvent |
mouseover | Yes | Yes | Element | MouseEvent |
mousemove | Yes | Yes | Element | MouseEvent |
mouseout | Yes | Yes | Element | MouseEvent |
keydown | Yes | Yes | Element | KeyboardEvent |
keyup | Yes | Yes | Element | KeyboardEvent |
mousemultiwheel | Yes | Yes | Document, Element | MouseMultiWheelEvent |
mousewheel | Yes | Yes | Document, Element | MouseWheelEvent |
DOMSubtreeModified | Yes | No | Document, DocumentFragment, Element, Attr | MutationEvent |
DOMNodeInserted | Yes | No | Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction | MutationEvent |
DOMNodeRemoved | Yes | No | Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction | MutationEvent |
DOMNodeRemovedFromDocument | No | No | Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction | MutationEvent |
DOMNodeInsertedIntoDocument | No | No | Element, Attr, Text, Comment, CDATASection, DocumentType, EntityReference, ProcessingInstruction | MutationEvent |
DOMAttrModified | Yes | No | Element | MutationEvent |
DOMCharacterDataModified | Yes | No | Text, Comment, CDATASection, ProcessingInstruction | MutationEvent |
DOMElementNameChanged | Yes | No | Element | MutationNameEvent |
DOMAttributeNameChanged | Yes | No | Element | MutationNameEvent |
load | No | No | Document, Element | Event |
unload | No | No | Document, Element | Event |
abort | Yes | No | Element | Event |
error | Yes | No | Element | Event |
select | Yes | No | Element | Event |
change | Yes | No | Element | Event |
submit | Yes | Yes | Element | Event |
reset | Yes | Yes | Element | Event |
resize | Yes | No | Document, Element | UIEvent |
scroll | Yes | No | Document, Element | UIEvent |
javascript 处理事件绑定的一些兼容写法
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