主要是使用了来模拟实现，具体的HTML：
默认未选中
默认选中
默认未选中,简单的背景过渡效果,加mui-switch-animbg类即可
默认选中
默认未选中，过渡效果，加 mui-switch-anim
类即可
默认选中
在实际的使用中后来又增加了两个过渡效果，分别加 mui-switch-animbg和mui-switch-anim 类即可，具体效果查看下面的demo页面。
CSS代码(SCSS导出的，排版有些奇怪)：
.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; }
/*# sourceMappingURL=mui-switch.css.map */
SCSS代码：
@mixin borderRadius($radius:20px) {
border-radius: $radius;
border-top-left-radius: $radius;
border-top-right-radius: $radius;
border-bottom-left-radius: $radius;
border-bottom-right-radius: $radius;
}
$duration: .4s;
$checkedColor: #64bd63;
.mui-switch {
width: 52px;
height: 31px;
position: relative;
border: 1px solid #dfdfdf;
background-color: #fdfdfd;
box-shadow: #dfdfdf 0 0 0 0 inset;
@include borderRadius();
background-clip: content-box;
display: inline-block;
-webkit-appearance: none;
user-select: none;
outline: none;
&:before {
content: '';
width: 29px;
height: 29px;
position: absolute;
top: 0px;
left: 0;
@include borderRadius();
background-color: #fff;
box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}
&:checked {
border-color: $checkedColor;
box-shadow: $checkedColor 0 0 0 16px inset;
background-color: $checkedColor;
&:before {
left: 21px;
}
}
&.mui-switch-animbg {
transition: background-color ease $duration;
&:before {
transition: left 0.3s;
}
&:checked {
box-shadow: #dfdfdf 0 0 0 0 inset;
background-color: $checkedColor;
transition: border-color $duration, background-color ease $duration;
&:before {
transition: left 0.3s;
}
}
}
&.mui-switch-anim {
transition: border cubic-bezier(0, 0, 0, 1) $duration, box-shadow cubic-bezier(0, 0, 0, 1) $duration;
&:before {
transition: left 0.3s;
}
&:checked {
box-shadow: $checkedColor 0 0 0 16px inset;
background-color: $checkedColor;
transition: border ease $duration, box-shadow ease $duration, background-color ease $duration*3;
&:before {
transition: left 0.3s;
}
}
}
}
发现问题欢迎微博上@愚人码头，带上截图，机型，浏览器版本等，感激不尽！
