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JS implements positioning navigation bar

php中世界最好的语言Original: 2018-03-15 11:48:243379browse

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>

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!

JS implements positioning navigation bar

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