jQuery Manipulating CSS
jQuery has several methods for CSS manipulation. We will study the following:
addClass() - Add one or more classes to the selected element
removeClass() - Remove one or more classes from the selected element
toggleClass() - Add/delete class switching operation for selected elements
css() - Set or return style attributes
Style sheet
.important
{
font-weight:bold;
font-size:xx-large;
}
addClass() method
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("h1,h2,p").addClass("blue");
$("div").addClass("important");
});
});
</script>
<style type="text/css">
.important
{
font-weight:bold;
font-size:xx-large;
}
.blue
{
color:blue;
}
</style>
</head>
<body>
<h1>标题 1</h1>
<h2>标题 2</h2>
<p>段落1</p>
<p>段落2</p>
<div>文本</div>
<br>
<button>为元素添加 class</button>
</body>
</html>You can also specify multiple classes in the addClass() method ：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("#div1").addClass("important blue");
});
});
</script>
<style type="text/css">
.important
{
font-weight:bold;
font-size:xx-large;
}
.blue
{
color:blue;
}
</style>
</head>
<body>
<div id="div1">文本。</div>
<div id="div2">文本。</div>
<br>
<button>为第一个元素添加类</button>
</body>
</html>
removeClass() method
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("h1,h2,p").removeClass("blue");
});
});
</script>
<style type="text/css">
.important
{
font-weight:bold;
font-size:xx-large;
}
.blue
{
color:blue;
}
</style>
</head>
<body>
<h1 class="blue">标题 1</h1>
<h2 class="blue">标题 2</h2>
<p class="blue">段落1</p>
<p>段落2</p>
<br>
<button>从元素中移除 class</button>
</body>
</html>
##toggleClass() method
This method is The selected element performs the switching operation of adding/deleting classes:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("h1,h2,p").toggleClass("blue");
});
});
</script>
<style type="text/css">
.blue
{
color:blue;
}
</style>
</head>
<body>
<h1 class="blue">标题 1</h1>
<h2 class="blue">标题 2</h2>
<p class="blue">段落1</p>
<p>段落2</p>
<br>
<button>切换 class</button>
</body>
</html>
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