Home > Article > Web Front-end > Detailed explanation of examples of javaScript scroll bar events

Detailed explanation of examples of javaScript scroll bar events

黄舟Original: 2017-09-28 10:44:261517browse

This article mainly introduces the relevant information of javaScript to implement scroll bar events in detail. It has certain reference value. Interested friends can refer to it.

The examples in this article share the js implementation with everyone. The specific code of the scroll bar event is for your reference. The specific content is as follows

Code:

<html>

 <head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
  <title></title>

  <style>
   body {
    margin: 0;
    padding: 0;
   }

   .cont {
    height: 7000px;
   }

   #top {
    position: fixed;
    width: 100%;
    height: 55px;
    top: 0px;
    left: 0px;
    background-color: rosybrown;
    display: none;
   }

   #left {
    position: fixed;
    width: 50px;
    height: 400px;
    top: 150px;
    left: 50px;
    background-color: cadetblue;
    display: none;
   }

   #left ul {
    list-style: none;
    padding-left: 0px;
   }

   #left ul li {
    border: 1px solid white;
    /*color: azure;*/
    height: 30px;
    line-height: 30px;
    text-align: center;
    margin: 15px auto;
    /*display: none;*/
   }

   .a {
    background-color: burlywood;
    color: #FFFFFF;
   }
  </style>

  <script>
   //滚动事件
   function myScroll() {

    var i = document.body.scrollTop;
    var top = document.getElementById("top");
    var left = document.getElementById("left");
    var f1 = document.getElementById("f1");
    var f2 = document.getElementById("f2");
    var f3 = document.getElementById("f3");
    var f4 = document.getElementById("f4");
    var f5 = document.getElementById("f5");
    var f6 = document.getElementById("f6");

    //控制顶部
    if(i >= 1000) {
     top.style.display = "block";
     top.innerHTML = i;
    } else {
     top.style.display = "none";
    }

    //控制左侧
    if(i >= 2000) {
     left.style.display = "block";
    } else {
     left.style.display = "none";
    }

    //显示楼层

    if(i >= 2000 && i <= 2500) {
     f1.className = "a";
     f2.className = "";
     f3.className = "";
     f4.className = "";
     f5.className = "";
     f6.className = "";
    } else if(i > 2500 && i <= 3000) {
     f1.className = "";
     f2.className = "a";
     f3.className = "";
     f4.className = "";
     f5.className = "";
     f6.className = "";
    } else if(i > 3000 && i <= 3500) {
     f1.className = "";
     f2.className = "";
     f3.className = "a";
     f4.className = "";
     f5.className = "";
     f6.className = "";
    } else if(i > 3500 && i <= 4000) {
     f1.className = "";
     f2.className = "";
     f3.className = "";
     f4.className = "a";
     f5.className = "";
     f6.className = "";
    } else if(i > 4000 && i <= 4500) {
     f1.className = "";
     f2.className = "";
     f3.className = "";
     f4.className = "";
     f5.className = "a";
     f6.className = "";
    } else if(i > 4500 && i <= 5000) {
     f1.className = "";
     f2.className = "";
     f3.className = "";
     f4.className = "";
     f5.className = "";
     f6.className = "a";
    }

   }
  </script>

 </head>

 <body onscroll="myScroll()">
  <p id="left">
   <ul>
    <li id="f1">1F</li>
    <li id="f2">2F</li>
    <li id="f3">3F</li>
    <li id="f4">4F</li>
    <li id="f5">5F</li>
    <li id="f6">6F</li>

   </ul>

  </p>
  <p id="top"></p>
  <p class="cont"></p>

 </body>

</html>

The above is the detailed content of Detailed explanation of examples of javaScript scroll bar events. For more information, please follow other related articles on the PHP Chinese website!

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：Detailed explanation of the implementation of JavaScript checkbox all-select and inverse-select eventsNext article：Detailed explanation of the implementation of JavaScript checkbox all-select and inverse-select events

See more

Detailed explanation of examples of javaScript scroll bar events

Related articles