Some compatible writing methods for handling event binding in javascript_javascript skills

Bind event

Copy code The code is as follows:

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]();
} );
}
};

Another implementation

Copy code The code is as follows:

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);
} ; It is triggered when attributes change. Common ones include text length changes, sample length changes, etc. FF's roughly similar attribute is the oninput event, but it only targets the value attributes of textfield and textarea. Safari, Firefox, Chrome and Opera all support this attribute.

Copy code


The code is as follows:

var addPropertyChangeEvent = function (obj,fn) { if(window.ActiveXObject){ obj.onpropertychange = fn; }else{ obj.addEventListener("input",fn,false); }

}

Remove event




Copy code

The code is as follows:

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;

}

};


Loading event




Copy code

The code is as follows:

var loadEvent = function(fn) { var oldonload = window.onload; if (typeof window.onload != 'function') { window.onload = fn; }else { window.onload = function() {

oldonload();

fn();
}
}
}


Block event




Copy Code

The code is as follows:

var stopEvent = function(e){ e = e || window.event; if(e.preventDefault ) { e.preventDefault(); e.stopPropagation(); }else{

e.returnValue = false;

e.cancelBubble = true;
}
}


If you just want to prevent event bubbling




Copy the code

The code is as follows:

var stopPropagation = function(e) { e = e || window.event; if (! "v1") { e.cancelBubble = true; } else { e.stopPropagation();

}

}


Get the event source object

Equivalent to Event.element(e of the Prototype.js framework )

Copy code


The code is as follows:

var getEvent = function(e){ e = e || window.event; var target = event.srcElement ? event.srcElement : event.target; return target }

Or this function is more powerful , I developed it when developing datagrid. For detailed usage, see "Teach you step by step how to implement table sorting (Part 2)".




Copy code

The code is as follows:

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

作者:Ruby's Louvre