Webmastertoolbag Tryit Editor

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="none" rel="stylesheet">
  
</head>
<body>

<div class="container mt-3">
  <h1>Height Utilities</h1>
  <p>Set the height of an element with the h-* classes:</p>
  <div style="height:200px;background-color:#ddd">
    <div class="h-25 d-inline-block p-2 bg-warning">Height 25%</div>
    <div class="h-50 d-inline-block p-2 bg-warning">Height 50%</div>
    <div class="h-75 d-inline-block p-2 bg-warning">Height 75%</div>
    <div class="h-100 d-inline-block p-2 bg-warning">Height 100%</div>
    <div class="h-auto d-inline-block p-2 bg-warning">Auto Height</div>
    <div class="mh-100 d-inline-block p-2 bg-warning" style="height:500px">Max Height 100%</div>
  </div>
</div>