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Javascript js中两个相同侦听器的捕获和气泡的执行顺序_Javascript_Html_Events_Capture - Fatal编程技术网

Javascript js中两个相同侦听器的捕获和气泡的执行顺序

Javascript js中两个相同侦听器的捕获和气泡的执行顺序,javascript,html,events,capture,Javascript,Html,Events,Capture,为什么结果不是这样 test.html:50 I am capturing html test.html:44 I am capturing body test.html:32 I am capturing parent test.html:35 I am parent test.html:56 I am capturing parent test.html:59 I am parent test.html:47 I am body test.html:53 I am html 请详细解释一下

为什么结果不是这样

test.html:50 I am capturing html
test.html:44 I am capturing body
test.html:32 I am capturing parent
test.html:35 I am parent
test.html:56 I am capturing parent
test.html:59 I am parent
test.html:47 I am body
test.html:53 I am html
请详细解释一下

各州:

注意:对于附加到事件目标的事件侦听器,事件处于目标阶段,而不是捕获和冒泡阶段。目标阶段中的事件将按照元素注册的顺序触发元素上的所有侦听器,而不考虑
useCapture
参数

这就是这里发生的事情。事件侦听器附加到事件目标(
parent
,在您的示例中),因此事件处于目标阶段,侦听器按注册顺序触发

请注意,如果单击子级,则不会发生这种情况,因为事件处于捕获或冒泡阶段。预期的结果是:

test.html:50 I am capturing html
test.html:44 I am capturing body
test.html:32 I am capturing parent
test.html:56 I am capturing parent
test.html:35 I am parent
test.html:59 I am parent
test.html:47 I am body
test.html:53 I am html
对事件流有很好的解释和图表


最重要的是目标阶段触发捕获和冒泡动作

第二阶段(“目标阶段”:到达要素的事件)不单独处理: 捕获和冒泡阶段的处理程序都会在该阶段触发

test.html:50 I am capturing html
test.html:44 I am capturing body
test.html:32 I am capturing parent
test.html:56 I am capturing parent
test.html:35 I am parent
test.html:59 I am parent
test.html:47 I am body
test.html:53 I am html
I am capturing html
I am capturing body
I am capturing parent
I am capturing parent
I am capturing child
I am child
I am parent
I am parent
I am body
I am html