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How to use css and class methods in jquery for style operations

清浅Original: 2018-11-13 14:48:452162browse

The content of this article is to introduce cases about jQuery operation styles and changing styles. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you

jQuery operation style

class operation

(1)判断是否有样式类
hasClass(name)//name:用于判断的样式类名，返回值为true false
判断div是否有demo的样式类
$(“div”).hasClass(“demo”)
(2)添加样式类
addClass(name)//name指需要添加的样式类名，注意参数不要带点.
//给div添加demo的样式。
$(“div”).addClass(“demo”);
(3)移除样式类
removeClass("name")//name:需要移除的样式类名
//移除div中demo的样式
$(“div”).removeClass(“demo”);

css operation (the operation is style Attributes)

(1)获取样式
css(name)//name:需要获取的样式名称
//获取div的背景颜色属性
$("div").css("background-color");
注意：获取样式操作只会返回第一个元素对应的样式值。
(2)设置单个样式
css(name,value)//name：需要设置的样式名称,value：对应的样式值
//给一个div标签的背景修改成红色
$("div").css("background","red");
（3）设置多个样式
css(obj)//参数是一个对象，对象中包含了需要设置的样式名和样式值
//例如
$("#one").css({
 "background":"gray",
 "width":"400px",
 "height":"200px"
});

Case sharing: interlaced color change

Change the background color through css operations and class operations in jQuery

<!DOCTYPE html>
<html>
<head><meta charset="UTF-8"></head>
<body>
	<style>
	*{
		padding: 0;
		margin:0;
	}
		ul{list-style: none;
		}
		li{
			width:300px;
			height:30px;
			background-color:rgb(14,150,249);
			
		}
		.even{
			background-color:rgb(241,70,215);
		}
	</style>
	<ul>
		<li>第一个</li>
		<li>第二个</li>
		<li>第三个</li>
		<li>第四个</li>
		<li>第五个</li>
		<li>第六个</li>
	</ul>
<script src="jquery/jquery-1.12.4.js"></script>
   <script>
   $(function(){
//给奇数的li修改背景颜色
$("li:odd").css("backgroundColor","pink");
//给偶数的li添加even类
$("li:even").addClass(&#39;even&#39;);
});
</script>
</body>
</html>

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