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HTML

CSS

CSS Base

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JavaScript

Babel includes JSX processing.

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HTML

              
                <div class="loading">
  <div class="numerator">
    <h2>Loading</h2>
    <h1>0%</h1>
    <hr/>
  </div>
</div>
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Muli)

h1,h2,div
  margin: 0
  padding: 0

.done
  border: 2px solid #FFDB5C

body
  width: 100vw
  height: 100vh
  overflow: hidden
  display: flex
  font-family: Muli
  box-sizing: border-box
  margin: 0
  padding: 0
  
.loading
  background: #002C54
  width: 100vw
  height: 100vh
  display: flex
  justify-content: center
  align-items: center
  
  .numerator
    text-align: center
    padding: 5vw
    
    h2
      font-size: 40px
      font-weight: 100
      color: #FFDB5C
      
    h1 
      color: white
      font-size: 60px
      margin-top: 0px
    
    hr
      display: block
      box-sizing: border-box
      border: 2px dashed #FFDB5C
      box-shadow: 0 0 10px 0 #DDA288
              
            
!

JS

              
                $(document).ready(function() {
    
  var a = 0;
  var set1 = setInterval(function() {
    $("h1").html(a + '%');
    $("hr").css("width", a + '%');
    a++;
    
    if (a == 101) {
      clearInterval(set1);
      $('hr').addClass('done');
    }
  }, 40);  
});
              
            
!
999px

Console