css() method sets or returns one or more style attributes of the selected element.
Return CSS properties
To return the value of the specified CSS property, please use the following syntax:
css("propertyname");
<!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(){
alert("背景颜色 = " + $("p").css("background-color"));
});
});
</script>
</head>
<body>
<h2>这是一个标题</h2>
<p style="background-color:#ff0000">这是一个段落。</p>
<p style="background-color:#00ff00">这是一个段落。</p>
<p style="background-color:#0000ff">这是一个段落。</p>
<button>返回 p 元素的 background-color </button>
</body>
</html>Set CSS properties
To set the specified CSS properties, please use the following syntax:
css("propertyname","value");
<!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(){
$("p").css("background-color","yellow");
});
});
</script>
</head>
<body>
<h2>标题</h2>
<p style="background-color:#ff0000; width:200px;">段落1</p>
<p style="background-color:#00ff00; width:200px;">段落2</p>
<p style="background-color:#0000ff; width:200px;">段落3</p>
<p style="width:300px;">段落4</p>
<button>设置 p 元素的背景</button>
</body>
</html>Set multiple CSS properties
If you need to set multiple CSS properties, please use the following syntax:
css({"propertyname":"value ","propertyname":"value",...});
<!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(){
$("p").css({"background-color":"yellow","font-size":"200%"});
});
});
</script>
</head>
<body>
<h2>标题</h2>
<p style="background-color:#ff0000; width:200px;">段落1</p>
<p style="background-color:#00ff00; width:200px;">段落2</p>
<p style="background-color:#0000ff; width:200px;">段落3</p>
<p style="width:300px;">段落4</p>
<button>设置 p 元素的背景</button>
</body>
</html>
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