<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-align-3/#valdef-justify-self-last-baseline">
<style>
.target {
  display: grid;
  grid-auto-flow: column;
  inline-size: 100px;
  position: relative;
  line-height: 0;
  padding: 10px;
  writing-mode: vertical-lr;
}
.target > div {
  background: hotpink;
  font-size: 30px;
}
.line-clamp {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  border: solid 10px;
  font-size: 40px !important;
  overflow: hidden;
}
.line-clamp div {
  background: orange;
}
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 > *')">

<!-- Five lines -->
<div class="target" style="align-items: first baseline;">
  <div data-offset-x="25"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><span></span><br><span></span><br><span></span><br><span></span>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="105"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><span></span><br><span></span><br><span></span><br><span></span>
  </div>
</div>

<!-- Two lines -->
<div class="target" style="align-items: first baseline;">
  <div data-offset-x="25"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><span></span>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="65"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><span></span>
  </div>
</div>

<!-- Three lines -->
<div class="target" style="align-items: first baseline;">
  <div data-offset-x="25"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><span></span><br><span></span>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="105"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><span></span><br><span></span>
  </div>
</div>


<!-- Wrapping div -->
<div class="target" style="align-items: first baseline;">
  <div data-offset-x="25"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <div><span></span><br><span></span><br><span></span><br><span></span><br><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="105"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <div><span></span><br><span></span><br><span></span><br><span></span><br><span></span></div>
  </div>
</div>

<!-- Nested div after first line -->
<div class="target" style="align-items: first baseline;">
  <div data-offset-x="25"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><div><span></span><br><span></span><br><span></span><br><span></span></div>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="105"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><div><span></span><br><span></span><br><span></span><br><span></span></div>
  </div>
</div>

<!-- Block within inline. -->
<div class="target" style="align-items: first baseline;">
  <div data-offset-x="25"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><i><span></span><div><span></span><br><span></span><br><span></span></div></i>
  </div>
</div>

<div class="target" style="align-items: last baseline;">
  <div data-offset-x="105"><span></span></div>
  <div class="line-clamp" data-offset-x="10">
    <span></span><br><i><span></span><div><span></span><br><span></span><br><span></span></div></i>
  </div>
</div>
