JavaScript事件起泡与捕获

// 向 <div> 元素添加事件句柄
document.getElementById("myDIV").addEventListener("mousemove", myFunction);

// 移除 <div> 元素的事件句柄
document.getElementById("myDIV").removeEventListener("mousemove", myFunction);

addEventListener() 方法用于向指定元素添加事件句柄。

element.addEventListener(event, function, useCapture)  //语法

useCapture：可选。布尔值，指定事件是否在捕获或冒泡阶段执行。

• true - 事件句柄在捕获阶段执行
• false- false- 默认。事件句柄在冒泡阶段执行

事件捕获阶段capture phase，传播顺序：window -> 事件源的父元素.  The event object must propagate through the target's ancestors from the Window to the target's parent.

事件冒泡阶段bubble phase，传播顺序：事件源父元素 -> window.  The event object propagates through the target’s ancestors in reverse, starting with the target's parent and ending with the Window.

目标阶段target phase：事件对象到达事件源。The event object arrive at the event object's event target.

可参考相关文章 ： https://www.cnblogs.com/zhuzhenwei918/p/6139880.html

http://blog.csdn.net/qq_28602957/article/details/60475123