很多人做tab选项卡会用到js,通过排他思想去实现选项卡，其实只用css也可以轻松实现。

效果如下

html代码如下

<div class="tab">
			
			<input type="radio" name="tab-one" id="r1" class="hid" checked />
			<input type="radio" name="tab-one" id="r2" class="hid" />
			<input type="radio" name="tab-one" id="r3" class="hid" />
			
			<ul class="label-list">
				<li>
					<label for="r1">选项卡1</label>
				</li>
				<li>
					<label for="r2">选项卡2</label>
				</li>
				<li>
					<label for="r3">选项卡3</label>
				</li>
			</ul>
			
			<div class="box-one">1</div>
			<div class="box-two">2</div>
			<div class="box-three">3</div>
			
		</div>

css

		<style>
			*{
				padding: 0px;
				margin: 0px;
			}
			body{
				background-color: #fff;
			}
			.tab{
				background-color: antiquewhite;
				width: 500px;
				height: 300px;
				position: absolute;
				top: 0px;
				bottom: 0px;
				left: 0px;
				right: 0px;
				margin: auto;
			}
			.box-one,
			.box-two,
			.box-three{
				width: 100%;
				height: 85%;
				display: none;
			}
			#r1:checked ~ .box-one{
				display: block;
			}
			#r1:checked ~ .label-list>li label[for="r1"]{
				color: blueviolet;
				background-color: antiquewhite;
			}
			#r2:checked ~ .box-two{
				display: block;
			}
			#r2:checked ~ .label-list>li label[for="r2"]{
				color: blueviolet;
				background-color: antiquewhite;
			}
			#r3:checked ~ .box-three{
				display: block;
			}
			#r3:checked ~ .label-list>li label[for="r3"]{
				color: blueviolet;
				background-color: antiquewhite;
			}
			.label-list{
				display: flex;
				background-color: #63ff40;
				height: 15%;
			}
			.label-list li{
				list-style-type: none;
			}
			.label-list li label{
				height: 100%;
				display: inline-block;
				display: flex;
				align-items: center;
				padding: 0px 10px;
				cursor: pointer;
			}
			.hid{
				display: none;
			}
		</style>

使用html+css实现tab选项卡，我们会用到单选框，一组单选框的每一个选项对应一个卡片。当单选框被选中时，对应的卡片就显示。

这里我们会用到一个css选择器，相邻选择器，也就是哪个波浪线（~），相邻选择器可以选择同级元素。

#r1:checked ~ .box-one{
				display: block;
			}