Posted in Javascript onApril 07, 2017
本文实例讲述了JS实现的模仿QQ头像资料卡显示与隐藏效果。分享给大家供大家参考,具体如下:
我们使用QQ时经常需要查看朋友的资料卡,当我们把鼠标移入头像时,资料卡显示,并且鼠标能在头像与资料卡之间能随意移动,当鼠标移出头像或资料卡时,资料卡延时隐藏。
实质就是延时提示框问题!
首先写好布局:
<style> div { float:left; margin:5px; } .head { width:50px;height:50px;background-color:pink; } .info { width:250px;height:200px;background-color:blue;display:none; } </style> <div> <div class="head"></div> <div class="info"></div> </div>
其次js部分:
思路:
(1)鼠标移入头像,资料卡显示;鼠标移出头像,资料卡延时隐藏setTimeout
(2)鼠标移入资料卡,资料卡仍显示,并清除资料卡延时隐藏的变量
(3)鼠标移出资料卡,资料卡延时隐藏,并且此时如果在移入到头像中,资料卡扔显示,并清除资料卡延时隐藏的变量
window.onload =function(){ var oHead = document.getElementsByClassName("head")[0]; var oInfo = document.getElementsByClassName("info")[0]; var timer = null; oHead.onmouseover=function(){ clearTimeout(timer); oInfo.style.display="block"; }; oHead.onmouseout=function(){ timer = setTimeout(function(){ oInfo.style.display="none"; },500); }; oInfo.onmouseover=function(){ clearTimeout(timer); oInfo.style.display="block"; }; oInfo.onmouseout=function(){ timer = setTimeout(function(){ oInfo.style.display="none"; },500); }; };
优化代码:
oInfo.onmouseover = oHead.onmouseover=function(){ clearTimeout(timer); oInfo.style.display="block"; }; oInfo.onmouseout = oHead.onmouseout=function(){ timer = setTimeout(function(){ oInfo.style.display="none"; },500); };
函数封装:
注意:事件 .xx 等于 [“xx”]
第一种:函数外获取变量,调用函数,适用于一个或两个元素调用此事件
window.onload =function(){ var oHead = document.getElementsByClassName("head")[0]; var oInfo = document.getElementsByClassName("info")[0]; reminder(oHead,oInfo,"onmouseover","onmouseout"); function reminder (div1,div2,event1,event2){ var timer = null; div1[event1] = div2[event1]=function(){ clearTimeout(timer); div2.style.display="block"; }; div1[event2] = div2[event2]=function(){ timer = setTimeout(function(){ div2.style.display="none"; },500); }; } };
第二种:函数外获取变量,调用函数,适用于多个元素调用此事件
window.onload =function(){ var number=0; reminder("head","info","onmouseover","onmouseout",number); function reminder (div1,div2,event1,event2,num){ var oHead = document.getElementsByClassName(div1)[num]; var oInfo = document.getElementsByClassName(div2)[num]; var timer = null; oHead[event1] = oInfo[event1]=function(){ clearTimeout(timer); oInfo.style.display="block"; }; oHead[event2] = oInfo[event2]=function(){ timer = setTimeout(function(){ oInfo.style.display="none"; },500); }; } };
比如,一共有三个头像的话,就可以用for循环遍历为每个元素绑定事件:
var number=null; for(number=0;number<3;number++){ reminder("head","info","onmouseover","onmouseout",number); }
希望本文所述对大家JavaScript程序设计有所帮助。
JS实现的模仿QQ头像资料卡显示与隐藏效果
- Author -
艾米兔声明:登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述。
Reply on: @reply_date@
@reply_contents@