纯css实现开关按钮（滑块）

<div class="onoffswitch">
<input type="checkbox" name="onoffswitch" class="onoffswitch-checkbox" id="myonoffswitch" checked>
<label class="onoffswitch-label" for="myonoffswitch">
<span class="onoffswitch-inner"></span>
<span class="onoffswitch-switch"></span>
</label>
</div>

<style>
.onoffswitch {
position: relative;
width: 83px;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
}

.onoffswitch-checkbox {
display: none;
}

.onoffswitch-label {
display: block;
overflow: hidden;
cursor: pointer;
border: 2px solid #999999;
border-radius: 20px;
}

.onoffswitch-inner {
display: block;
width: 200%;
margin-left: -100%;
transition: margin 0.3s ease-in 0s;
}

.onoffswitch-inner:before,
.onoffswitch-inner:after {
display: block;
float: left;
width: 50%;
height: 30px;
padding: 0;
line-height: 30px;
font-size: 19px;
color: white;
font-family: Trebuchet, Arial, sans-serif;
font-weight: bold;
box-sizing: border-box;
}

.onoffswitch-inner:before {
content: "ON";
padding-left: 13px;
background-color: #4FACDB;
color: #FFFFFF;
}

.onoffswitch-inner:after {
content: "OFF";
padding-right: 13px;
background-color: #F50E4C;
color: #FAFAFA;
text-align: right;
}

.onoffswitch-switch {
display: block;
width: 21px;
margin: 4.5px;
background: #FFFFFF;
position: absolute;
top: 0;
bottom: 0;
right: 49px;
border: 2px solid #999999;
border-radius: 20px;
transition: all 0.3s ease-in 0s;
}

.onoffswitch-checkbox:checked+.onoffswitch-label .onoffswitch-inner {
margin-left: 0;
}

.onoffswitch-checkbox:checked+.onoffswitch-label .onoffswitch-switch {
right: 0px;
}
</style>