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JS实现的模仿QQ头像资料卡显示与隐藏效果

更新时间:2020-05-04 20:06:01 作者:startmvc
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

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);
}

JS 模仿 QQ头像 资料卡 显示 隐藏