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Babel includes JSX processing.

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Code Indentation

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                <div class="cntr">
  <div class="row press">
    <input type="checkbox" id="unchecked" class="cbx hidden"/>
    <label for="unchecked" class="lbl"></label>    
  <div class="row press">
    <input type="checkbox" id="checked" class="cbx hidden" checked/>
    <label for="checked" class="lbl"></label>
   <div class="row">
    <input type="checkbox" id="unchecked_disabled" class="cbx hidden" disabled/>
    <label for="unchecked_disabled" class="lbl"></label>


  background #EEEEEE

  position relative
  display block
  height 20px
  width 44px
  background #898989
  border-radius 100px
  cursor pointer
  transition all .3s ease
    position absolute
    left -2px
    top -3px
    display block
    width 26px
    height 26px
    border-radius 100px
    background white
    box-shadow 0px 3px 3px rgba(#000,.05)
    content ''
    transition all .3s ease
      transform scale(1.15, .85)

.cbx:checked ~ label
  background #6FBEB5
    left 20px
    background #179588
.cbx:disabled ~ label
  background #D5D5D5
  pointer-events none
    background #BCBDBC
  position absolute
  top 50%
  left 50%
  transform translate(-50%,-50%)
  margin-bottom 40px
  display none


                //Pure CSS