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HTML

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Adding Classes

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CSS

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CSS Base

About CSS Base

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Vendor Prefixing

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JavaScript

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Babel includes JSX processing.

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HTML 

              
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!

CSS 

              
                .mistletoe{
  width: 500px;
  margin: auto;
}
#ribbon{
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  animation: dash 5s linear forwards;
}

@keyframes dash {
  to {
    stroke-dashoffset: 0;
  }
}
!

JS
!
999px

Console