为了账号安全，请及时绑定邮箱和手机立即绑定

课程

/前端开发

/JavaScript

/DOM事件探秘

编程练习为什么要阻止事件冒泡

title.onclick=function(event){

                event = event ||window.event;

                // 执行脚本

                if(event.stopPropagation){

                    event.stopPropagation();

                }else{

                    event.cancelBubble=true;

                }

               menu.style.display='block';

            }


攻城3707672

2016-08-17

源自：DOM事件探秘  5-1

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qq_慕神1420022
2022-03-31

8份宽和4份宽有什么区别吗？

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非典型材料IT男
2016-10-17

如果不阻止的话，menu菜单打不开，一直被冒泡给设置为none 了

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老司机tony
2016-08-18

不阻止冒泡的话，就会先执行title的click事件让menu显示，同时会冒泡到document的click事件，让menu消失。

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大GIGI
2016-08-18

防止它层层往上触发

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弦歌知雅意
2016-08-18

因为需要在点击空白处的时候把menu隐藏啊 title触发click事件也会影响到document的click事件

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