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Mouse wheel scrolling switching page effect implemented by js (similar to 360 default page scrolling switching effect)_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:17:391932browse

The example in this article describes the method of using mouse wheel scrolling to switch pages using js. Share it with everyone for your reference, the details are as follows:

The screenshot of the running effect is as follows:

The specific code is as follows: 

<!DOCTYPE html>
<html>
 <head>
  <title>wheel</title>
  <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
  <script type="text/javascript" >
   var currentShowPageIndex = 0;
   var animateTimeout = null;
   var isWheelAnimating = false;
   var isWheelUp = function(event) {
    event = event || window.event;
    var up = true;
    if(event.wheelDelta){//IE/Opera/Chrome
     up = event.wheelDelta / 120 == 1 &#63; true : false;
    }else{//Firefox
     up = event.detail / 3 == 1 &#63; true : false;
    }
    return up;
   }
   var changeBar = function(prevIndex, index) {
    var barUl = document.getElementById('barUl');
    var barLiList = barUl.getElementsByTagName('li');
    barLiList[prevIndex].className = "";
    barLiList[index].className = "active"; 
   }
   var changePage = function(pageIndex) {
    var showPageUl = document.getElementById('wheelUl');
    changeBar(currentShowPageIndex, pageIndex);
    currentShowPageIndex = pageIndex;
    var left = -(currentShowPageIndex) * 1000;
    showPageUl.style.marginLeft = left + "px";
    return;
   }
   var animate = function(obj, mode, from, to){
    if(animateTimeout) {
     clearTimeout(animateTimeout);
    }
    if(mode == "left") {
     if(from > to) {
      from = from - 50;
      obj.style.marginLeft = (from) + "px";
      setTimeout(function(){
       animate(obj, mode, from, to);
      }, 30);
     } else {
        isWheelAnimating = false;
       }
     return;
    } 
    if(from < to) {
     from = from + 50;
     obj.style.marginLeft = (from) + "px";
     setTimeout(function(){
      animate(obj, mode, from, to);
     }, 30);
    } else {
       isWheelAnimating = false;
      }
   }
   var mouseWheel = function(event) { 
    if(isWheelAnimating) {
      return;
    }
    isWheelAnimating = true;
    var wheelUp = isWheelUp(event);
    var showPageUl = document.getElementById('wheelUl');
    var showPageUlWidth = parseInt(showPageUl.offsetWidth);
    var showPageLiList = showPageUl.getElementsByTagName('li');
    var showPageLiListLength = showPageLiList.length;
    var wheelWrapperLeft = parseInt(document.getElementById('wheelWrapper').offsetLeft);
    if(wheelUp && currentShowPageIndex < showPageLiListLength - 1) {
     changeBar(currentShowPageIndex, currentShowPageIndex + 1);
     currentShowPageIndex ++;
     var left = -(currentShowPageIndex) * 1000;
     //animate(showPageUl, "right", -(currentShowPageIndex - 1) * 1000, -(currentShowPageIndex - 1) * 1000);
     var from = -(currentShowPageIndex - 1) * 1000;
     var to = -(currentShowPageIndex) * 1000;
     animate(showPageUl, "left", from, to);
     return;
    }
    if(!wheelUp && currentShowPageIndex > 0) {
     changeBar(currentShowPageIndex, currentShowPageIndex - 1);
     currentShowPageIndex --;
     var from = -(currentShowPageIndex + 1) * 1000;
     var to = -(currentShowPageIndex) * 1000;
     animate(showPageUl, "right", from, to);
     return;
    } 
    isWheelAnimating = false;
   };
   if(document.addEventListener){
    document.addEventListener('DOMMouseScroll',function(event) { mouseWheel(event); },false);
   }
   document.onmousewheel = function(event) { mouseWheel(event); }
   window.onload = function(){
    var barUl = document.getElementById('barUl');
    var barLiList = barUl.getElementsByTagName('li');
    for(var i=0,length=barLiList.length; i<length; i++) {
     (function(index){
      barLiList[index].onclick = function(){
       changePage(index);
      };
     })(i);
    }
   }
  </script>
  <style type="text/css" >
   body { background:#494949; margin:0; }
   ul { list-style:none; margin:0; padding:0; }
   li { float:left;}
   #wheelWrapper {
    width:1000px; height:550px; margin:0 auto; 
    position:fixed; left:50%; margin-left:-505px;
    bottom:50px; overflow:hidden;
   }
   #wheelUl {
    width:5050px; height:500px;
   }
   #barUl {
    clear:both; margin:0 auto; width:550px;
    margin-top:20px; line-height:25px;
   }
   #barUl>li {
    width:100px; background:orange;
    height:25px; margin-right:10px;
    border-radius:5px; text-align:center;
    -webkit-border-radius:5px;
    -moz-border-radius:5px;
   }
   #barUl>li:hover {
    background:#C36C12;
   }
   #barUl>li[class=active] {
    background:#C36C12;
   }
   #wheelUl>li { width:1000px; }
   .wheel {
    width:994px; height:500px; background:#FAAA3C;
    border-radius:10px;
    -webkit-border-radius:10px;
    -moz-border-radius:10px;
    margin:0 auto;
    line-height:300px;
    font-size:100px;
    text-align:center;
   }
   .radius {
    border-radius:3px;
    -webkit-border-radius:3px;
    -moz-border-radius:3px;
   }
   h1 { text-align:center; color:#fff; }
  </style>
 </head>
 <body id="body">
  <h1 >ie8+,chrome,ff提供支持</h1>
  <div id="wrapper">
   <div id="wheelWrapper">
    <ul id="wheelUl" >
     <li >
      <div class="wheel">
       1_page1
      </div>
     </li>
     <li >
      <div class="wheel">
       2_page2
      </div>
     </li>
     <li >
      <div class="wheel">
       3_page3
      </div>
     </li>
     <li >
      <div class="wheel">
       4_page4
      </div>
     </li>
     <li >
      <div class="wheel">
       5_page5
      </div>
     </li>
    </ul>
    <ul id="barUl">
     <li class="active">
      1
     </li>
     <li>
      2
     </li>
     <li>
      3
     </li>
     <li>
      4
     </li>
     <li>
      5
     </li>
    </ul>
   </div>
  </div>
 </body>
</html>

Readers who are interested in more content related to jQuery special effects can check out the special topics on this site: "Summary of common classic special effects of jQuery" and "Summary of jQuery animation and special effects usage"

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

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