<!DOCTYPE html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html>
<head>
  <title>
    CSS Reference
  </title>
  <style>
    .box {
      display: flex;
      flex-direction: column;
      border: 1px solid black;
      margin: 5px 20px;
      float: left; /* For testing in "rows" */
      font: 10px serif;
    }
    .box > *:nth-child(1) {
      background: turquoise;
      /* auto width */
      height: 1em;
    }
    .box > *:nth-child(2) {
      background: salmon;
      font-size: 50%;
      width: 2em;
      /* auto height */
    }

    .bastart    { align-items: flex-start; }
    .bacenter   { align-items: center;     }
    .baend      { align-items: flex-end;   }
    .babaseline { align-items: baseline;   }
    .bastretch  { align-items: stretch;    }
    br { clear: both; }
  </style>
</head>
<body>
  <!-- FIRST ROW: Default -webkit-box-align -->
  <!-- intrinsically sized -->
  <div class="box">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra width -->
  <div class="box" style="width: 36px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height -->
  <div class="box" style="height: 40px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height and width -->
  <div class="box" style="width: 36px; height: 40px">
    <div>a</div><div>b</div>
  </div>
  <br>

  <!-- SECOND ROW:  -webkit-box-align: start -->
  <!-- intrinsically sized -->
  <div class="box bastart">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra width -->
  <div class="box bastart" style="width: 36px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height -->
  <div class="box bastart" style="height: 40px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height and width -->
  <div class="box bastart" style="width: 36px; height: 40px">
    <div>a</div><div>b</div>
  </div>
  <br>

  <!-- THIRD ROW:  -webkit-box-align: center -->
  <!-- intrinsically sized -->
  <div class="box bacenter">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra width -->
  <div class="box bacenter" style="width: 36px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height -->
  <div class="box bacenter" style="height: 40px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height and width -->
  <div class="box bacenter" style="width: 36px; height: 40px">
    <div>a</div><div>b</div>
  </div>
  <br>

  <!-- FOURTH ROW:  -webkit-box-align: end -->
  <!-- intrinsically sized -->
  <div class="box baend">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra width -->
  <div class="box baend" style="width: 36px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height -->
  <div class="box baend" style="height: 40px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height and width -->
  <div class="box baend" style="width: 36px; height: 40px">
    <div>a</div><div>b</div>
  </div>
  <br>

  <!-- FIFTH ROW:  -webkit-box-align: baseline -->
  <!-- intrinsically sized -->
  <div class="box babaseline">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra width -->
  <div class="box babaseline" style="width: 36px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height -->
  <div class="box babaseline" style="height: 40px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height and width -->
  <div class="box babaseline" style="width: 36px; height: 40px">
    <div>a</div><div>b</div>
  </div>
  <br>
  <!-- SIXTH ROW:  -webkit-box-align: stretch -->
  <!-- intrinsically sized -->
  <div class="box bastretch">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra width -->
  <div class="box bastretch" style="width: 36px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height -->
  <div class="box bastretch" style="height: 40px">
    <div>a</div><div>b</div>
  </div>

  <!-- explicit size, extra height and width -->
  <div class="box bastretch" style="width: 36px; height: 40px">
    <div>a</div><div>b</div>
  </div>
  <br>

</body>
</html>