@mixin install-placeholder($color, $font-size) {
    $placeholder-selectors: (
    //   '::-webkit-input-placeholder'
    //   '::-moz-placeholder'
    //   ':-moz-placeholder'
    //   ':-ms-input-placeholder'
    );
  
    &::placeholder {
      @include placeholder($color, $font-size);
    }
  
    @each $selector in $placeholder-selectors {
      &#{$selector} {
        @include placeholder($color, $font-size);
      }
  
      &:focus#{$selector} {
        @include placeholder-focus();
      }
    }
  }