There are three phrases during event propagation: Capturing: Event goes down from top to bottom of the DOM tree, you don't get access toevent.target Targeting: When event reach the target element, it is targetin
event propagation javascript event propagation learning outcomes: what is event propagation the lifecycle of an event and its four phases event capturing and bubbling the stoppropagation() method and its application the stopimmediatepropagation() method the currenttarget property introduction in the previous...
document 监听了点击事件,判断 event target 是否是 #menucontainer 或父元素是 #menucontainer,如果不是,那你就可以知道点击区域在 #menucontainer 之外。
In JavaScript, you can prevent an event frompropagatingby callingeitherof the followingtwomethods on theeventobject: Event.stopPropagation()— stopsevent propagationto other elements in the event flow, either in thecapturingorbubblingphase, butallowsother event listeners attached to thesameelement to be...
5.事件对象(Event Object):事件对象是在触发事件时自动创建的一个JavaScript对象,提供了关于事件的详细信息和属性。事件处理函数可以通过参数来接收并访问事件对象。例如,可以从事件对象中获取鼠标位置、按键信息等。 6.事件传播(Event Propagation):当同一类型的事件同时应用到多个嵌套元素时,事件会沿着DOM树进行传播。事...
除了DOM节点,还可以部署在window、XMLHttpRequest等对象上面,等于统一了整个JavaScript的监听函数接口。 3 事件的传播 3.1 传播的三个阶段 当一个事件发生以后,它会在不同的DOM节点之间传播(propagation)。这种传播分成三个阶段: 第一阶段:从window对象传导到目标节点,称为“捕获阶段”(capture phase)。
stopImmediatePropagation() 取消事件冒泡,并取消该事件的后续事件处理函数 isImmediatePropagationStopped() 判断是否调用了stopImmediatePropagation()方法 捕获冒泡 1.事件冒泡:事件按照从最特定的事件目标到最不特定的事件目标(一般为document对象)的顺序触发。
解决方案二:使用event.stopImmediatePropagation()。 当同一元素绑定多个事件监听器时,此方法不仅能阻止冒泡,还会阻止当前元素的后续事件处理。典型应用场景是需优先处理某个关键操作(如支付验证),避免其他插件或脚本的干扰。 还有一种方法是通过判断事件源(event.target)来精细化处理事件流。这种方式在动态加载内容的场景...
e.stopImmediatePropagation(); } functionl2(e){ console.log('hello world'); } el.addEventListener('click', l1,false); el.addEventListener('click', l2,false); 上面代码在el节点上,为click事件添加了两个监听函数l1和l2。由于l1调用了event.stopImmedi...
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