纯css模仿微信switch开关按钮

业务需要需要做一个微信switch开关

效果图

html样式

<label><input class="mui-switch" type="checkbox"> 默认未选中label><br>
<label><input class="mui-switch" type="checkbox" checked> 默认选中label><br>
<label><input class="mui-switch mui-switch-animbg" type="checkbox"> 默认未选中,简单的背景过渡效果,加mui-switch-animbg类即可label><br>
<label><input class="mui-switch mui-switch-animbg" type="checkbox" checked> 默认选中label><br>
<label><input class="mui-switch mui-switch-anim" type="checkbox"> 默认未选中，过渡效果，加 mui-switch-anim类即可label><br>
<label><input class="mui-switch mui-switch-anim" type="checkbox" checked> 默认选中label>

css 样式

 .mui-switch {
            width: 52px;
            height: 31px;
            position: relative;
            border: 1px solid #dfdfdf;
            background-color: #fdfdfd;
            box-shadow: #dfdfdf 0 0 0 0 inset;
            border-radius: 20px;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
            border-bottom-left-radius: 20px;
            border-bottom-right-radius: 20px;
            background-clip: content-box;
            display: inline-block;
            -webkit-appearance: none;
            user-select: none;
            outline: none; }
        .mui-switch:before {
            content: '';
            width: 29px;
            height: 29px;
            position: absolute;
            top: 0px;
            left: 0;
            border-radius: 20px;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
            border-bottom-left-radius: 20px;
            border-bottom-right-radius: 20px;
            background-color: #fff;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4); }
        .mui-switch:checked {
            border-color: #64bd63;
            box-shadow: #64bd63 0 0 0 16px inset;
            background-color: #64bd63; }
        .mui-switch:checked:before {
            left: 21px; }
        .mui-switch.mui-switch-animbg {
            transition: background-color ease 0.4s; }
        .mui-switch.mui-switch-animbg:before {
            transition: left 0.3s; }
        .mui-switch.mui-switch-animbg:checked {
            box-shadow: #dfdfdf 0 0 0 0 inset;
            background-color: #64bd63;
            transition: border-color 0.4s, background-color ease 0.4s; }
        .mui-switch.mui-switch-animbg:checked:before {
            transition: left 0.3s; }
        .mui-switch.mui-switch-anim {
            transition: border cubic-bezier(0, 0, 0, 1) 0.4s, box-shadow cubic-bezier(0, 0, 0, 1) 0.4s; }
        .mui-switch.mui-switch-anim:before {
            transition: left 0.3s; }
        .mui-switch.mui-switch-anim:checked {
            box-shadow: #64bd63 0 0 0 16px inset;
            background-color: #64bd63;
            transition: border ease 0.4s, box-shadow ease 0.4s, background-color ease 1.2s; }
        .mui-switch.mui-switch-anim:checked:before {
            transition: left 0.3s;}