<!DOCTYPE HTML>
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     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
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<html><head>
  <meta charset="utf-8">
  <title>Reference: align-self/justify-self:baseline/last baseline</title>
  <link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
  <style>
html,body {
    color:black; background-color:white; font:15px/1 monospace; padding:0; margin:0;
}
body { width:600px; height:600px; border:1px solid; box-sizing:border-box; }

.grid {
  float: left;
  display: grid;
  grid: auto / repeat(4, auto);
  place-items: start;
  padding-block-start: 1px;
  margin-left: 1px;
  border:1px solid;
  height: 100px;
  width: 100px;
}
.c { grid: repeat(4, auto) / auto; }
.ae { align-content: end; }
.je { justify-content: end; }

span {
  text-decoration: underline lime;
  text-decoration-thickness: 1px;
  text-underline-offset: 0;
  text-decoration-skip-ink: none;
  background: grey;
}
.central > span { text-decoration-line: line-through; }
x { display:block; visibility:hidden; }
span:nth-child(1) { font-size:10px; }
span:nth-child(2) { font-size:15px; }
span:nth-child(3) { font-size:25px; }
span:nth-child(4) { font-size:30px; }
.pbe { padding-block-end:20px; }
.pbs { padding-block-start:20px; }

.fb { align-self:baseline; }
.lb { align-self:last baseline; }

.jfb { justify-self:baseline; }
.jlb { justify-self:last baseline; }

.hl { writing-mode: horizontal-tb; direction:ltr; }
.hr { writing-mode: horizontal-tb; direction:rtl; }
.vll { writing-mode: vertical-lr; direction:ltr; }
.vlr { writing-mode: vertical-lr; direction:rtl; }
.vrl { writing-mode: vertical-rl; direction:ltr; }
.vrr { writing-mode: vertical-rl; direction:rtl; }
.swl { writing-mode: sideways-lr; }
.swr { writing-mode: sideways-rl; }

</style>
</head>
<body>

<!-- TODO: baseline alignment is wrong (bug 1633610)
<div class="grid je c vrr"><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span></div>
<div class="grid je c vrr"><span class="jfb hl pbe">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span></div>
<div class="grid je c swl"><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span></div>
-->
<div class="grid je c swr"><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span><span class="jfb hl">F<br><x>x</x></span></div>
<div class="grid ae"><span class="lb hl"><x>x</x><br>L</span><span class="lb hl"><x>x</x><br>L</span><span class="lb hl"><x>x</x><br>L</span><span class="lb hl"><x>x</x><br>L</span></div>

<br clear="all">

<div class="grid"><span class="lb hl pbe"><x>x</x><br>L</span><span class="lb hl"><x>x</x><br>L</span><span class="lb hl"><x>x</x><br>L</span><span class="lb hl"><x>x</x><br>L</span></div>
<div class="grid vll central"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid vll central"><span class="lb pbs"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid vrr central"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid vrr central"><span class="lb pbe"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>

<br clear="all">

<div class="grid swl"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid swr"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid vlr central"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid vlr central"><span class="lb pbs"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid vrl central"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>

<br clear="all">

<div class="grid vrl central"><span class="lb pbe"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid swl"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>
<div class="grid swr"><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span><span class="lb"><x>x</x><br>L</span></div>

</body>
</html>