JS手动触发事件,转载
1. createEvent(eventType)
参数:eventType 共5种类型:
Events :包括所有的事件.
HTMLEvents:包括 'abort', 'blur', 'change', 'error', 'focus', 'load', 'reset', 'resize', 'scroll', 'select',
'submit', 'unload'. 事件
UIEevents :包括 'DOMActivate', 'DOMFocusIn', 'DOMFocusOut', 'keydown', 'keypress', 'keyup'.
间接包含 MouseEvents.
MouseEvents:包括 'click', 'mousedown', 'mousemove', 'mouseout', 'mouseover', 'mouseup'.
MutationEvents:包括 'DOMAttrModified', 'DOMNodeInserted', 'DOMNodeRemoved',
'DOMCharacterDataModified', 'DOMNodeInsertedIntoDocument',
'DOMNodeRemovedFromDocument', 'DOMSubtreeModified'.
2. 在createEvent后必须初始化,为大家介绍5种对应的初始化方法
HTMLEvents 和 通用 Events:
initEvent( 'type', bubbles, cancelable )
UIEvents :
initUIEvent( 'type', bubbles, cancelable, windowObject, detail )
MouseEvents:
initMouseEvent( 'type', bubbles, cancelable, windowObject, detail, screenX, screenY,
clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget )
MutationEvents :
initMutationEvent( 'type', bubbles, cancelable, relatedNode, prevValue, newValue,
attrName, attrChange )
3. 在初始化完成后就可以随时触发需要的事件了,为大家介绍targetObj.dispatchEvent(event)
使targetObj对象的event事件触发
需要注意的是在IE 5.5+版本上请用fireEvent方法,还是浏览兼容的考虑
4. 例子
//例子1 立即触发鼠标被按下事件
var fireOnThis = document.getElementById('someID');
var evObj = document.createEvent('MouseEvents');
evObj.initMouseEvent( 'click', true, true, window, 1, 12, 345, 7, 220, false, false, true, false, 0, null );
fireOnThis.dispatchEvent(evObj);
//例子2 考虑兼容性的一个鼠标移动事件
var fireOnThis = document.getElementById('someID');
if( document.createEvent )
{
var evObj = document.createEvent('MouseEvents');
evObj.initEvent( 'mousemove', true, false );
fireOnThis.dispatchEvent(evObj);
}
else if( document.createEventObject )
{
fireOnThis.fireEvent('onmousemove');//兼容IE
}
![](https://images2015.cnblogs.com/blog/623144/201607/623144-20160704153736327-1290497568.png)
![](https://img2018.cnblogs.com/blog/623144/201903/623144-20190319194730266-1448057040.png)