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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div include="form-input-select()">
  <select required>
    <!--
      This is how we can do "placeholder" options.
      note: "required" attribute is on the select
    -->
    <option value=""
            hidden
    >Example Placeholder</option>

    <!-- normal options -->
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
    <option value="5">Option 5</option>
  </select>
</div>



            
          
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CSS

            
              // Demo Colors
$demo-blue: #005BA6;
$demo-gray: #D6D6D6;
$demo-placeholder: #C7C7C7;
$demo-border: #E6E6E6;

$border-width: 3px;

// Select function
@mixin form-input-select(){
  // see https://codepen.io/jnowland/pen/KzYQxp for reset function
  @include _select-form-reset; 
  color: $demo-blue;
  display: block;
  border-radius: 0;
  box-shadow: none;
  font-size: 16px;
  // padding: 11px 15px;
  margin-top: 9px;
  margin-bottom: 15px;
  width: 100%;

  &::before,
  &::after {
    content: '';
    display: block;
    position: absolute;
    pointer-events: none; // Arrow clickable in some browsers

    // triangle set up
    border: 1px solid transparent; // reset all borders
    width: 0;
    height: 0;
    right: 16px;
  }

  // top arrow
  &::before {
    bottom: 55%;
    border-width: 0 6.5px 8px 6.5px;
    border-bottom-color: $demo-gray;
  }

  // bottom arrow
  &::after {
    border-width: 8px 6.5px 0 6.5px;
    border-top-color: $demo-gray;
    top: 55%;
  }
  
  // firefox is outside the div
  @-moz-document url-prefix() {
    border-right: $border-width solid $demo-border;
    
    &:hover {
      border-right: $border-width solid $demo-blue;
    }
  }

  &:hover {

    select {
      box-shadow: 0 2px 3px rgba($demo-blue, 0.1) inset;
      border-color: $demo-blue;

      // outline is critical but when we are hovering the div has the border already.
      &:focus {
        outline-color: transparent;
      }
      
    }

    &::before {
      border-bottom-color: $demo-blue;
    }
    &::after {
      border-top-color: $demo-blue;
    }

  }

  // Make sure you set all padding, borders on this select and not the parent div.
  // this is mainly for :focus and tabbing.

  select {
    border: $border-width solid $demo-border;
    border-radius: 0;
    font-weight: 400;
    color: inherit;
    padding: 11px 15px;
    line-height: normal;
    transition: border-color 0.2s ease,
                outline 0.2s ease;


    // we really need this for the tabbers
    // causes double borders though
    &:focus {
      box-shadow: 0 3px 4px rgba($demo-blue, 0.3) inset;
      // outline is critical for usability
      outline: $border-width solid $demo-blue;
      outline-offset: -#{$border-width}; //offset vs width
    }

    &[disabled], &:disabled{
      opacity: 0.4;
      cursor: not-allowed;
    }

    // we use invalid like a placeholder
    // 2019-03-05 added not selector for firefox and ie
    &:not(:focus):invalid {
      color: $demo-placeholder;
    }

  }
}

// Show the function
[include*="form-input-select()"] {
  @include form-input-select();
}


body {
  display: flex;
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
  border: 1em solid $demo-blue;
  
  div {
    max-width: 16em;
  }
}

// begin spec stuff up
html {
  box-sizing: border-box;
}
*, *:before, *:after {
  box-sizing: inherit;
}
// end stuff up
            
          
!

JS

            
              // cross browser native select that has a placeholder styling

// The include="" selecor is just a way of documenting what functions do in scss lib

            
          
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999px

Console