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JS implements positioning navigation bar

Mar 15, 2018 am 11:48 AM
javascript position navigation

This time I will bring you JS to implement the positioning navigation bar. What are the precautions for JS to implement the positioning navigation bar? The following is a practical case, let's take a look.

The complete code is as follows:

<!DOCTYPE html> 
<html> 
<head> 
<meta charset="utf-8"> 
<style type="text/css"> 
*{margin:0;padding:0;} 
.nav{width:100%;position:absolute;top:150px;} 
.nav ul{width:1200px;height:50px;margin:0 auto;background:#ccc;} 
.nav ul li{width:150px;height:50px;line-height:50px;text-align:center;list-style:none;float:left;cursor:pointer;} 
.nav ul li:hover{background:#666;} 
.nav ul li a{color:#000;font-size:18px;text-decoration:none;} 
.nav .active{background:#666;} 
.cont{width:1200px;height:4500px;margin:0 auto;} 
.cont ol{width:1200px;height:4500px;margin:0 auto;} 
.cont ol li{width:1200px;height:500px;list-style:none;} 
.cont ol li p{color:#000;font-size:48px;} 
</style> 
</head> 
<body> 
<p style="height:200px;width:100%;"></p> 
<p class="nav"> 
  <ul> 
    <li class="active">page1</li> 
    <li>page2</li> 
    <li>page3</li> 
    <li>page4</li> 
    <li>page5</li> 
    <li>page6</li> 
    <li>page7</li> 
    <li>page8</li> 
  </ul> 
</p> 
<p class="cont"> 
  <ol> 
    <li style="background:#aaa"><p>page1</p></li> 
    <li style="background:#999"><p>page2</p></li> 
    <li style="background:#666"><p>page3</p></li> 
    <li style="background:#333"><p>page4</p></li> 
    <li style="background:#bbb"><p>page5</p></li> 
    <li style="background:#aaa"><p>page6</p></li> 
    <li style="background:#ccc"><p>page7</p></li> 
    <li style="background:#000"><p>page8</p></li> 
  </ol> 
</p>  
<script type="text/javascript" src="http://code.jquery.com/jquery-2.1.1.min.js"></script> 
<script type="text/javascript">  
$(".nav ul li").click(function(){ 
    var index=$(this).index(); 
    var i=150+index*501+'px' 
    $("html,body").animate({scrollTop:i},500)      
  })    
$(window).scroll(function(){ 
    if($(window).scrollTop()>150){ 
      $(".nav").css({"position":"fixed","top":"0px"}) 
    } 
    else{ 
      $(".nav").css({"position":"absolute","top":"150px"}) 
    }  
  for(var x=0;x<8;x++){ 
    var i=150+x*500 
  if($(window).scrollTop()>i && $(window).scrollTop()<i+500){   
    $(".nav ul li").eq(x).addClass("active").siblings().removeClass("active")} 
  }  
}) 
</script> 
</body> 
</html>
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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

How to create paging effect with jquery

Why jQuery cannot trigger binding events when adding elements Processing

How to add and remove menus on the left and right sides with JS

How to encapsulate the animate.css code with jQuery

The above is the detailed content of JS implements positioning navigation bar. For more information, please follow other related articles on the PHP Chinese website!

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