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+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>CSS Grid Test: fit-content() track sizing</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1299133">
+  <style type="text/css">
+body,html { color:black; background:white; font-size:16px; padding:0; margin:0; }
+
+.grid {
+  display: grid;
+  grid-auto-rows: 5px;
+  justify-content: start;
+  position: relative;
+  border: 1px solid;
+}
+
+.c1 { grid-template-columns: fit-content(40%) 25px minmax(100px, 1fr); }
+.c2 { grid-template-columns: fit-content(40%) 25px 0 25px minmax(100px, 1fr); }
+.c3 { grid-template-columns: fit-content(40%) 25px fit-content(40%) 25px minmax(0px, 1fr); }
+.c4 { grid-template-columns: fit-content(40%) 25px 100px 25px minmax(100px, 1fr); }
+.c5 { grid-template-columns: fit-content(40%) 25px minmax(0, 1fr) 25px minmax(100px, 1fr); }
+.c6 { grid-template-columns: fit-content(calc(1px - 99%)) 25px minmax(0, 1fr) 25px minmax(100px, 1fr); }
+.c7 { grid-template-columns: fit-content(40%) 25px fit-content(40%); }
+
+span {
+  grid-column: 1 / span 3;
+  grid-row: 2;
+  height: 2px;
+  background: lime;
+  min-width: 50px;
+}
+.c1 span { grid-column:1; }
+
+a {
+  display: inline-block;
+  width: 50px;
+  height: 1px;
+}
+
+y {
+    position: absolute;
+    left: 0; right: 0; top: 0;
+    height: 2px;
+    background: purple;
+    grid-column: 1 / 2;
+}
+y:nth-of-type(2n) { background: orange; grid-column: 3 / 4; }
+
+  </style>
+</head>
+<body>
+
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c6"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+
+<div style="width:502px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c6"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:442px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:382px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:322px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:262px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:202px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c7"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:142px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:82px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:22px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c6"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+<div style="width:2px">
+<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y><y></y></div>
+</div>
+
+</body>
+</html>