<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#flex-baselines">
<style>
.target {
  display: flex;
  position: relative;
  line-height: 0;
  font-size: 20px;
  inline-size: 200px;
  margin-inline: 10px;
  padding: 10px;
  border: solid 3px;
  writing-mode: vertical-rl;
}

.inner {
  display: flex;
  border: solid 5px;
  padding: 10px;
}

span {
  display: inline-block;
  width: 1em;
  height: 1em;
  outline: solid cyan 3px;
  outline-offset: -3px;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<body onload="checkLayout('.target > *')">

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="40"><span></span></div>
  <div class="inner" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="30"><span></span></div>
  <div class="inner" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="30"><span></span></div>
  <div class="inner" style="flex-direction: row-reverse;" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="40"><span></span></div>
  <div class="inner" style="flex-direction: row-reverse;" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="50"><span></span></div>
  <div class="inner" style="flex-direction: column;" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="30"><span></span></div>
  <div class="inner" style="flex-direction: column;" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="40"><span></span></div>
  <div class="inner" style="flex-direction: column-reverse;" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="20"><span></span></div>
  <div class="inner" style="flex-direction: column-reverse;" data-offset-x="10">
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
  </div>
</div>

<!-- flex-wrap: wrap -->

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="70"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="33"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="65"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; flex-direction: row-reverse; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="45"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; flex-direction: row-reverse; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="55"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; flex-direction: column; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="38"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; flex-direction: column; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="50"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; flex-direction: column-reverse; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="20"><span></span></div>
  <div class="inner" style="flex-wrap: wrap; flex-direction: column-reverse; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<!-- flex-wrap: wrap-reverse -->

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="75"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="30"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="63"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; flex-direction: row-reverse; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="35"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; flex-direction: row-reverse; inline-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="60"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; flex-direction: column; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="30"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; flex-direction: column; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: first baseline;">
  <div data-offset-x="43"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; flex-direction: column-reverse; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="25"><span></span></div>
  <div class="inner" style="flex-wrap: wrap-reverse; flex-direction: column-reverse; block-size: 50px;" data-offset-x="10">
    <div style="font-size: 20px;"><span></span></div>
    <div style="font-size: 30px;"><span></span></div>
    <div style="font-size: 10px;"><span></span></div>
    <div style="font-size: 35px;"><span></span></div>
  </div>
</div>
