jquery实现楼层滚动效果

时间:2020-05-16 spfLinux 人气:0

本文实例为大家分享了jquery实现楼层滚动效果展示的具体代码，供大家参考，具体内容如下

html:

<!DOCTYPE html> 
<html lang="en"> 
<head> 
  <meta charset="UTF-8"> 
  <title>Document</title> 
  <link rel="stylesheet" href="css/base.css" rel="external nofollow" > 
  <style> 
    #header,#f1,#f2,#f3{ 
      width: 80%; 
      height: 500px; 
      background: yellow; 
      margin-left: 10%; 
      margin-top: 50px; 
    } 
    #f1{ 
      background: green; 
    } 
    #f2{ 
      background: red; 
    } 
    #f3{ 
      background: blue; 
    } 
    #lift{ 
      position: fixed; 
      top: 280px; 
      display: none; 
    } 
    .lift_btn{ 
      display: inline-block; 
      width: 50px; 
      height: 50px; 
      border: 1px solid #000; 
    } 
    .hover{ 
      background: red; 
    } 
  </style> 
</head> 
<body> 
  <div id="header"></div> 
  <div class="floor" id="f1"> 
    <p>第一层</p> 
  </div> 
  <div class="floor" id="f2"> 
    <p>第二层</p> 
  </div> 
  <div class="floor" id="f3"> 
    <p>第三层</p> 
  </div> 
  <div id="lift"> 
    <ul> 
      <li class="lift_item"> 
        <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="lift_btn"> 
          <span>1</span> 
        </a> 
      </li> 
      <li class="lift_item"> 
        <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="lift_btn"> 
          <span>2</span> 
        </a> 
      </li> 
      <li class="lift_item"> 
        <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="lift_btn"> 
          <span>3</span> 
        </a> 
      </li> 
    </ul> 
  </div> 
 
  <script src="js/jquery.min.js"></script> 
  <script src="js/floor.js"></script> 
</body> 
</html>

js:

(()=>{ 
  var $lift=$("#lift"); 
  $(window).scroll(()=>{ 
    var scrollTop=$('html,body').scrollTop(); 
    var $f1=$("#f1"); 
    var offsetTop=$f1.offset().top; 
    if(offsetTop<scrollTop+innerHeight/2) 
      $lift.fadeIn(500); 
    else 
      $lift.fadeOut(500); 
    var $floors=$(".floor"); 
    $floors.each((i,elem)=>{ 
      var $f=$(elem); 
      if($f.offset().top<scrollTop+innerHeight/2) 
        $lift.find(".lift_item:eq("+i+")").addClass("hover").siblings().removeClass("hover"); 
    }); 
  }); 
 
  $lift.children("ul").on("click","li",function(){ 
    var $li=$(this); 
    var i=$li.index(); 
    var $fi=$(".floor:eq("+i+")"); 
    var offsetTop=$fi.offset().top; 
    $("html").animate({ 
      scrollTop:offsetTop-60 
    },500) 
  }) 
})();

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