简单的 switch 按钮，HTML/Vue代码在线实时编辑、预览

            
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            *,*:before,*:after{
  box-sizing: border-box;
  margin: 0;
  padding: 0;  
}
body{
  background: #eff3e4;  
}

@mixin switchOn(){
  #switch__checkbox:checked ~ .switch__label & {
    @content
  }
}

$switch-bg:#0b1821;
$border:7px;
$border-rad:45px;
$border-color:#c3b912;
$w:190px;
$h:80px;
$animTime:1s;
//circle
$circle-h:49px;
$circle-w:49px;

.switch-bg{
  background: $switch-bg;
}
.switch-border{
  border:#0a2c42 solid 7px !important;
 
}
body{
  transition:$animTime;
  z-index:10;
}

#switch__checkbox{  
  z-index:-10;
  position:absolute;
  left:0;
  top:0;  
  display:none;
}
.switch{
  z-index:99;
  position:absolute;
  overflow:hidden;
  width: $w;
  height: $h;
  left:50%;
  top:50%;
  border:$border solid $border-color;
  border-radius:$border-rad;
  margin-left: $w/-2;
  margin-top: $h/-2; 
  &__label{
    overflow:hidden;
    z-index:10;
    position:absolute;    
    width: 100%;
    height: 100%;    
  }
  &__circle{    
    position:absolute;
    z-index:10;
    width: $circle-w;
    height: $circle-h;
    background: #d9d726;
    border-radius:50%;
    top:0;
    left:0;
    margin-left: 10px;
    margin-top: 9px;
    transition:all $animTime;
    //transform-origin:90%,70%;
    #switch__checkbox:not(checked) ~.switch__label &{
      animation:size-back $animTime/1.6 linear;
      -moz-animation:size-back $animTime/1.6 linear both;
      
    }    
    
    @include switchOn{
      transform:translateX(107px); 
      -moz-transform:translateX(107px);
      background: #fff;
      animation:size $animTime/1.6 linear;   
      -moz-animation:size $animTime/1.6 linear;
      
    }
    
    &:before{
      position:absolute;
      z-index:-10;
      content:'';
      width: $circle-w;
      height: $circle-h;
      top:0;
      left:-50px;
      background: #eff3e4;
      border-radius:50%;
      transition:all $animTime;
      -moz-transition:all $animTime;
      @include switchOn{        
        transform:translate3d(65%,0,0);  
        -moz-transform:translate3d(65%,0,0);
      }
      @include switchOn{        
        background: $switch-bg; 
      }
      
    }
  }     
}
//animation forward
@keyframes size {
  0%{
    transform:translateX(0) scale(1);
    background:#d9d726;
    
  }
  55% {   
    transform:translateX(45px) scale(0.5);
    background:#d9d726;
  }   
 
  100%{
    transform:translateX(108px) scale(1);    
  }
}
//animation back
@keyframes size-back {
  0%{
    transform:translateX(108px) scale(1);
    background:white;
    
  }
  55% {   
    transform:translateX(45px) scale(0.5);
    
  }   
 
  100%{
    transform:translateX(0) scale(1);
    
  }
}
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