jQuery中的CSS-DOM操作
除了css()以外，还有获取和设置元素高度、宽度、相对位置等的样式操作方法，语法如下：
高度和宽度示例：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>CSS-DOM操作演示示例</title>
<style>
.hot{
color: #ff0000;
}
a{
color: #000000;
text-decoration: none;
}
</style>
<!--引入jQuery-->
<script src="../jquery-3.3.1.js"></script>
<!--javascript-->
<script>
$(function(){
// 设置height()和width()都是200
$("li").find("span").css({"display":"block","border":"1px solid red"}).width(200).height(200);
});
</script>
</head>
<body>
<img src="ad.jpg" alt="1" />
<img src="ad.jpg" alt="2" />
<img src="ad.jpg" alt="3" />
<ul>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >小米的MI 2手机</a><span class="hot">火爆销售中</span></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >苹果iPad mini</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >三星GALAXY III</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >苹果iPhone 5s</a></li>
</ul>
<input type="button" value="点击按钮" />
</body>
</html>
效果：
元素相对位置示例：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>CSS-DOM操作演示示例</title>
<style>
.hot{
color: #ff0000;
}
a{
color: #000000;
text-decoration: none;
}
</style>
<!--引入jQuery-->
<script src="../jquery-3.3.1.js"></script>
<!--javascript-->
<script>
$(function(){
// 设置height()和width()都是200
//$("li").find("span").css({"display":"block","border":"1px solid red"}).width(200).height(200);
//offset
$("input[type='button']").click(function(){
var x=$("span").offset();
console.log(x);
$("span").text("横坐标:"+x.left+",纵坐标:"+x.top);
});
});
</script>
</head>
<body>
<img src="ad.jpg" alt="1" />
<img src="ad.jpg" alt="2" />
<img src="ad.jpg" alt="3" />
<ul>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >小米的MI 2手机</a><span class="hot">火爆销售中</span></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >苹果iPad mini</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >三星GALAXY III</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >苹果iPhone 5s</a></li>
</ul>
<input type="button" value="点击按钮" />
</body>
</html>
效果：
