css/css-flexbox/reference/overflow-area-003-ref.html

<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Flexible Box Layout Reference: Test flex container's overflow rect</title>
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">

  <style>
   .set {
     clear: both;
     margin: 1em;
   }

   .test {
     display: flex;
     padding: 10px;
     width: 60px;
     height: 60px;
     background: teal;
     margin: 1em 0.5em;
     float: left;
   }
  </style>

  <p>Test passes if all the teal boxes have no scrollbars.</p>

  <!-- This set tests emply flex containers. -->
  <div class="set">
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
  </div>

  <!-- This set tests flex containers having only abs-pos children, but no flex items. -->
  <div class="set">
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
  </div>

  <!-- This set tests flex containers having a small centered flex item. -->
  <div class="set">
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
  </div>

  <!-- This set tests flex containers having a relative positioned flex item. -->
  <div class="set">
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
    <div class="test"></div>
  </div>
</html>