就是从下往上,
子元素上面绑定了事件,父元素也绑定了事件,点击子元素就会冒泡啊
event.stopPropagation()
<div class="box1">
<div class="box2">
</div>
</div>
$('.box1').on('click',function(){
console.log('111')
})
$('.box2').on('click',function(){
// event.stopPropagation()
console.log('222')
})