Exemple d'effet de couche contextuelle d'animation pratique JS_compétences javascript-js tutoriel-php.cn

Exemple d'effet de couche contextuelle d'animation pratique JS_compétences javascript

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Libérer： 2016-05-16 16:01:04

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L'exemple de cet article décrit la méthode pratique d'effet de calque contextuel d'animation dans JS. Partagez-le avec tout le monde pour votre référence. La méthode de mise en œuvre spécifique est la suivante :

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>动画弹出层</title>
<style>
.list{
position:relative;;
background:#eee;
border:1px #ccc solid;
margin:10px;
height:30px;
width:100px;
cursor :pointer ;
}
.listShow{
position:relative;
background:#eff;
border:1px #ddd solid;
margin:10px;
height:30px;
width:100px;
cursor :pointer ;
}
.comment{
position:absolute;
left:0;
display:none;
position:absolute;
border:1px #ccc solid;
background:#fee;
width:200px;
height:200px;
overflow:hidden;
z-index:100;
}
</style>
</head>
<body>
<div class="" id="show">
0
</div>
<div class="list" id="list1">1
<div class="comment" id="comment1">内容显示111<br/>
</div>
<div class="list" id="list2">2
<div class="comment" id="comment2">内容显示222</div>
</div>
<div class="list" id="list3">3
<div class="comment" id="comment3">内容显示333</div>
</div>
</body>
</html>
<script>
var zindex=0;
function $id(id){
return document.getElementById(id);
}
var Bind = function(object,fun){
var args = Array.prototype.slice.call(arguments).slice(2);
return function(){
return fun.apply(object,args);
}
}
function addEventHandler(oTarget, sEventType, fnHandler){ 
if(oTarget.addEventListener){
oTarget.addEventListener(sEventType, fnHandler, false);
}
else if(oTarget.attachEvent){
oTarget.attachEvent('on' + sEventType, fnHandler);
}
else{oTarget['on' + sEventType] = fnHandler;}
}
var Shower=function(){
this.list=null;
this.comment=null;
this.moveLeft=80; 
this.moveTop=20;
this.height=150;
this.width=250;
this.time=800;
this.init=function(lisObj,comObj){
this.list=lisObj;
this.comment=comObj;
var _this=this;
this._fnMove=Bind(this,this.move);
(function(){
var obj=_this;
addEventHandler(obj.list,"click",obj._fnMove);
})();
};
this.move=function(){
var _this=this;
var w=0; 
var h=0; 
var height=0; //弹出div的高
var width=0; //弹出div的宽
var t=0;
var startTime = new Date().getTime();//开始执行的时间
if(!_this.comment.style.display||_this.comment.style.display=="none"){
_this.comment.style.display="block";
_this.comment.style.height=0+"px";
_this.comment.style.width=0+"px";
_this.list.style.zIndex=++zindex;
_this.list.className="listShow";
var comment=_this.comment.innerHTML; 
_this.comment.innerHTML=""; //去掉显示内容
var timer=setInterval(function(){
var newTime = new Date().getTime();
var timestamp = newTime - startTime;
_this.comment.style.left=Math.ceil(w)+"px";
_this.comment.style.top=Math.ceil(h)+"px";
_this.comment.style.height=height+"px";
_this.comment.style.width=width+"px";
t++;
var change=(Math.pow((timestamp/_this.time-1), 3) +1);
//根据运行时间得到基础变化量
w=_this.moveLeft*change;
h=_this.moveTop*change;
height=_this.height*change;
width=_this.width*change;
$id("show").innerHTML=w;
if(w>_this.moveLeft){
clearInterval(timer);
_this.comment.style.left=_this.moveLeft+"px";
_this.comment.style.top=_this.moveTop+"px"; _this.comment.style.height=_this.height+"px";
_this.comment.style.width=_this.width+"px";
_this.comment.innerHTML=comment; //回复显示内容
}
},1,_this.comment);
}else{
_this.hidden();
}
}
this.hidden=function(){
var _this=this;
var flag=1;
var hiddenTimer=setInterval(function(){
if(flag==1){
_this.comment.style.height=parseInt(_this.comment.style.height)-10+"px";
}else{
_this.comment.style.width=parseInt(_this.comment.style.width)-15+"px";
_this.comment.style.left=parseInt(_this.comment.style.left)+5+"px";
}
if(flag==1 && parseInt(_this.comment.style.height)<10){
flag=-flag;
}
if(parseInt(_this.comment.style.width)<20){
clearInterval(hiddenTimer);
_this.comment.style.left="0px";
_this.comment.style.top="0px";
_this.comment.style.height="0px";
_this.comment.style.width="0px";
_this.comment.style.display="none";
if(_this.list.style.zIndex==zindex){
zindex--;
};
_this.list.style.zIndex=0;
_this.list.className="list";
}
},1)
}
}
window.onload=function(){
//建立各个菜单对象
var shower1=new Shower();
shower1.init($id("list1"),$id("comment1"));
var shower2=new Shower();
shower2.init($id("list2"),$id("comment2"));
var shower3=new Shower();
shower3.init($id("list3"),$id("comment3"));
}
</script>

Copier après la connexion

L'effet est comme indiqué ci-dessous :

J'espère que cet article sera utile à la conception de la programmation JavaScript de chacun.