css/css-flexbox/reference/flex-box-wrap-ref.html

<!DOCTYPE html>
<html>
<head>
    <title>CSS Flexbox Test: flex-wrap: wrap</title>
    <link rel="author" title="Tsuyoshi Tokuda" href="mailto:tokuda109@gmail.com">
    <style type="text/css">

      .box {
         margin: 0;
         padding-left: 0;
         width: 200px;
       }
       .item {
         float: left;
         list-style-type: none;
         width: 120px;
         height: 100px;
         background-color: green;
       }

    </style>
</head>
<body>
    <p>There should be a green block with no red.</p>

    <ul class="box">
      <li class="item">width: 120px</li>
      <li class="item">width: 120px</li>
    </ul>

</body>
</html>