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HTML

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CSS

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CSS Base

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <div class='height-container'>
  <h1>This is the full height of the viewport</h1>
	<span class="decs">Resize the browser vertically</span>
</div>
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</p>
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CSS 

              
                html,body {
	margin: 0;
	padding: 0;
}

* {
  box-sizing: border-box;
}

.height-container {
  height: 100vh;
  background: rgba(219, 241, 143, 0.7);
  padding: 1.2rem;
  color: #4a4a4a;
  border: 3px solid #ae9bf7;
	text-align: center;
}

p {
  padding: 10px 15px;
}
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JS
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999px

Console