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Simple implementation of jquery focus map

高洛峰
高洛峰Original
2016-12-28 10:01:151227browse

The example in this article shares the implementation code of jquery focus map for your reference. The specific content is as follows

<!doctype html>
<html>
<head>
 <meta charset="UTF-8">
 <title>焦点图</title>
 <style type="text/css">
 img{position: relative;}
 ul{list-style: none;width: 545px;position: absolute;top: 280px;left: 170px;}
 li{float: left;width: 20px;line-height: 18px;border: 1px solid #ccc;background-color:#494a93;}
 a:hover{background-color: red;}
 a{display: block;width: 20px;line-height: 18px;color: white;text-decoration: none;text-align: center;font-size: 12px;font-family: arial;}
 p{width: 480px;text-align: center;}
 </style>
</head>
<body>
 <img src="images/1.jpg" alt="">
 <ul>
 <li><a href="images/1.jpg" title="日落">1</a></li>
 <li><a href="images/2.jpg" title="钢琴">2</a></li>
 <li><a href="images/3.jpg" title="大海">3</a></li>
 <li><a href="images/4.jpg" title="秋色">4</a></li>
 </ul>
 <p>这是一段测试文字</p>
 <script src="js/jquery-3.0.0.js"></script>
 <script type="text/javascript">
　　　　　　//方法一：超级简单易懂的方法
 /*$("ul li:nth-child(1) a").click(function(event){
  $("img").attr("src","images/1.jpg") 
 
  var imgsrc=$(this).attr("href")
  $("img").attr("src",imgsrc)
 
  $("img").attr("src",$(this).attr("href"))
 
  $("ul li:nth-child(1)").css("background-color","red")
  $("ul li:nth-child(2)").css("background-color","#494a93")
  $("ul li:nth-child(3)").css("background-color","#494a93")
  $("ul li:nth-child(4)").css("background-color","#494a93")
  event.preventDefault();
 })
 $("ul li:nth-child(2) a").click(function(event){
  $("img").attr("src","images/2.jpg")
 
  var imgsrc=$(this).attr("href")
  $("img").attr("src",imgsrc)
 
  $("ul li:nth-child(2)").css("background-color","red")
  $("ul li:nth-child(1)").css("background-color","#494a93")
  $("ul li:nth-child(3)").css("background-color","#494a93")
  $("ul li:nth-child(4)").css("background-color","#494a93")
  event.preventDefault();
 })
 $("ul li:nth-child(3) a").click(function(event){
  $("img").attr("src","images/3.jpg")
 
  var imgsrc=$(this).attr("href")
  $("img").attr("src",imgsrc)
 
  $("ul li:nth-child(3)").css("background-color","red")
  $("ul li:nth-child(2)").css("background-color","#494a93")
  $("ul li:nth-child(1)").css("background-color","#494a93")
  $("ul li:nth-child(4)").css("background-color","#494a93")
  event.preventDefault();
 })
 $("ul li:nth-child(4) a").click(function(event){
  $("img").attr("src","images/4.jpg")
 
  var imgsrc=$(this).attr("href")
  $("img").attr("src",imgsrc)
 
  $("ul li:nth-child(4)").css("background-color","red")
  $("ul li:nth-child(2)").css("background-color","#494a93")
  $("ul li:nth-child(3)").css("background-color","#494a93")
  $("ul li:nth-child(1)").css("background-color","#494a93")
  event.preventDefault();
 })*/
　　　　　　
　　　　　　//方法二：简化了方法一重复的代码量 ，利用.parent().siblings().find("a")选择到父级的其他兄弟元素
 $("ul li a").click(function(event){
  /*$("img").attr("src","images/4.jpg")*/
 
  var imgsrc=$(this).attr("href");
  $("img").attr("src",imgsrc);
   
  $(this).css({"background-color":"red","color":"yellow"});
  $(this).parent().siblings().find("a").css({"background-color":"#494a93","color":"white"});
  event.preventDefault();
 
  var txt=$(this).attr("title");
  console.log(txt); //在控制台输出
  $("p").text(txt);
 })
 /*$("ul li a").hover(function(event){ 
  $(this).css("background-color","red");
 },function(){
  $(this).css("background-color","#494a93")
 })*/
 </script>
</body>
</html>

The above is a simple focus map example. The idea is: the image path is written in the href attribute of the a tag. Here, click a to get $(this).attr("href"); and give this value to the src of img. Write a click event using simple jQuery.

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