JS implements slide text box zoom and stretch effect code

JS implements slide text box zoom and stretch effect code_javascript skills

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Release： 2016-05-16 15:33:49

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The example in this article describes the JS code to implement the zoom and stretch effect of the slide text box. Share it with everyone for your reference, the details are as follows:

The slide text box zoom and stretch effect introduced here was written by me when I had nothing to do. It is not very good. Maybe there is still work to do in terms of compatibility. In terms of expansion speed, IE8 and Firefox have different expansion speeds. It is better under Firefox. Hurry up, I haven't found the reason yet, please give some advice from JS experts.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-slide-txt-dlg-show-codes/

The specific code is as follows:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content" content="text/html charset=gb2312">
<title>slide文字框缩放伸展效果</title>
<style type="text/css">
*{margin:0; padding:0;}
ul{list-style:none;}
.box{width:300px; margin:10px; border:1px solid #ccc; overflow:hidden; position:relative; font-size:12px;}
.oHx{height:30px; background:#eee; line-height:30px; font-size:14px; text-indent:14px; cursor:pointer;}
.fold{position:absolute; top:9px; right:12px;}
.box_content{line-height:18px; overflow:hidden; display:none;}
</style>
<script type="text/javascript">
 function getElementsByClassName(className,id,tag){
    tag = tag || "*";
    if(id){
     var id = typeof id == "string" &#63; $(id) : id;
    }else{
     var id = document.body;
    }
    var els = id.getElementsByTagName(tag),arr = [];
    for(var i=0,n=els.length;i<n;i++){
     for(var j=0,k=els[i].className.split(" "),l=k.length;j<l;j++){
      if(k[j]==className){
       arr.push(els[i]);
       break;
      }
     }
    }
    return arr;
   };
   function Slide(slideClass,slideBtn,slideCon,slideSpeed) {
    this.oSlides = getElementsByClassName(slideClass);
    this.oTimer = null;
    this.slideBtn = slideBtn;
    this.slideCon = slideCon;
    this.slideSpeed = slideSpeed;
   }
   Slide.prototype = {
    oTimer:null,
    _init:function (){
     this._slideEvent();
    },
    _slideEvent:function (){
     var This = this;
     for(var i = 0,n=This.oSlides.length;i<n;i++){
      (function(n){
       var oSlide = This.oSlides[n];
       var oSlideBtn = getElementsByClassName(This.slideBtn,oSlide)[0];
       var oSlideCon = getElementsByClassName(This.slideCon,oSlide)[0];
       oSlideBtn.onclick = function (){
        if(oSlideCon.style.display == "block" && This.oTimer == null){
         This._slideClose(oSlideCon);
        }else if(!(oSlideCon.style.display == "block" ) && This.oTimer == null){
         This._slideOpen(oSlideCon);
        }
       }
      })(i)
     }
    },
    _slideOpen:function (slideCon){
     var This = this;
     slideCon.style.display = "block";
     slideCon.style.height = "auto";
     var slideHeight = slideCon.offsetHeight;
     slideCon.style.height = 0 + "px";
     This.oTimer = setInterval(function (){
      if(slideCon.offsetHeight < slideHeight){
       slideCon.style.height = slideCon.offsetHeight + 2 + "px";
      }else{
       clearInterval(This.oTimer);
       This.oTimer = null;
      }
     },This.slideSpeed);
    },
    _slideClose:function (slideCon){
     var This = this;
     This.oTimer = setInterval(function (){
      if(slideCon.offsetHeight <= 0){
       clearInterval(This.oTimer);
       slideCon.style.display = "none";
       This.oTimer = null;
      }else{
       slideCon.style.height =slideCon.offsetHeight - 2 + "px";
      }
     },This.slideSpeed);
    }
   }
  </script>
 </head>
 <body>
  <div class="box"> 
   <div class="oHx slide">收缩2</div> 
   <div class="box_content">
    <ul class="uft" style="padding:10px;"> 
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  <li><a href="#" target="_blank">jQuery 1.4 参考指南的实例源代码</a></li>
    </ul> 
   </div>
  </div>
  <div class="box"> 
   <div class="oHx slide">收缩3</div> 
   <div class="box_content">
    <ul class="uft"style="padding:10px;"> 
     <li><a href="#" target="_blank">scscms V1.0 阳光企业网站系统</a></li>
  <li><a href="#" target="_blank">24点，VC++游戏源码</a></li>
  <li><a href="#" target="_blank">可记录图像的C#数据库记录单程序</a></li>
  <li><a href="#" target="_blank">jQuery 1.4 参考指南的实例源代码</a></li>
    </ul> 
   </div>
  </div>
  <script type="text/javascript">
   var mySlide = new Slide("box","slide","box_content",10); 
   mySlide._slideEvent();
  </script>
 </body>
</html>

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I hope this article will be helpful to everyone in JavaScript programming.