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<!DOCTYPE HTML>
<!--
Any copyright is dedicated to the Public Domain.
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<html><head>
<meta charset="utf-8">
<title>Reference: Placement involving negative line numbers</title>
<link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1215957">
<style type="text/css">
body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
.grid {
display: grid;
position: relative;
border: 1px solid;
grid-auto-rows: 15px;
grid-gap: 1px;
}
.t1 {
grid-template-columns: 40px 40px 40px 40px 60px 60px 60px 40px 40px 40px 40px 40px;
}
.t2 {
grid-template-columns: 40px 40px 40px 40px 40px 60px 60px 60px 40px 40px 40px 40px;
}
.t3 {
grid-template-columns: 40px 40px 40px 40px 60px 60px 60px 40px 40px 40px 40px 40px 40px;
}
x {
background: lime;
border: 1px solid;
}
y {
position: absolute;
border: 1px solid blue;
bottom:0;height:0;left:0;right:0;
grid-row-end:span 1!important;
}
.a2 { bottom:2px; }
.a3 { bottom:4px; }
.a4 { bottom:6px; }
.a5 { bottom:8px; }
</style>
</head>
<body>
<pre>
grid-template-columns: 60px [A] 60px 60px;
grid-auto-columns: 40px;
grid-gap: 1px;
</pre>
<pre>grid-column-start:</pre>
<div class="grid t1" style="padding-right:13px; border-right-width:5px">
<x style="grid-row:1; grid-column-start:5; background:grey"></x>
<x style="grid-row:2; grid-column-start:8">-1</x>
<x style="grid-row:3; grid-column-start:8">4</x>
<x style="grid-row:3; grid-column-start:7">-2</x>
<x style="grid-row:3; grid-column-start:6">-3</x>
<x style="grid-row:3; grid-column-start:5">-4</x>
<x style="grid-row:3; grid-column-start:4">-5</x>
<x style="grid-row:4; grid-column-start:6">A -1</x>
<x style="grid-row:4; grid-column-start:4">B -1</x>
<x style="grid-row:5; grid-column-start:4">A -2</x>
<x style="grid-row:6; grid-column-start:3">A -3</x>
<x style="grid-row:6; grid-column-start:2">A -4</x>
<x style="grid-row:6; grid-column-start:1">A -5</x>
<x style="grid-row:7; grid-column-start:6">A</x>
<x style="grid-row:7; grid-column-start:9">B</x>
<x style="grid-row:8; grid-column-start:6">A 1</x>
<x style="grid-row:8; grid-column-start:9">A 2</x>
<x style="grid-row:8; grid-column-start:10">A 3</x>
<x style="grid-row:8; grid-column-start:11">A 4</x>
<x style="grid-row:8; grid-column-start:12">A 5</x>
<y style="grid-row:2; grid-column-start:8"></y>
<y style="grid-row:3; grid-column-start:8"></y>
<y style="grid-row:3; grid-column-start:7" class="a2"></y>
<y style="grid-row:3; grid-column-start:6" class="a3"></y>
<y style="grid-row:3; grid-column-start:5" class="a4"></y>
<y style="grid-row:3; grid-column-start:4" class="a5"></y>
<y style="grid-row:4; grid-column-start:6"></y>
<y style="grid-row:4; grid-column-start:4" class="a2"></y>
<y style="grid-row:5; grid-column-start:4"></y>
<y style="grid-row:6; grid-column-start:3"></y>
<y style="grid-row:6; grid-column-start:2" class="a2"></y>
<y style="grid-row:6; grid-column-start:1" class="a3"></y>
<y style="grid-row:7; grid-column-start:6"></y>
<y style="grid-row:7; grid-column-start:9" class="a2"></y>
<y style="grid-row:8; grid-column-start:6"></y>
<y style="grid-row:8; grid-column-start:9" class="a2"></y>
<y style="grid-row:8; grid-column-start:10" class="a3"></y>
<y style="grid-row:8; grid-column-start:11" class="a4"></y>
<y style="grid-row:8; grid-column-start:12" class="a5"></y>
</div>
<pre>grid-column-end:</pre>
<div class="grid t2" style="padding-left:13px;">
<x style="grid-row:1; grid-column-start:6; background:grey"></x>
<x style="grid-row:2; grid-column-start:8">-1</x>
<x style="grid-row:3; grid-column-start:8">4</x>
<x style="grid-row:3; grid-column-start:7">-2</x>
<x style="grid-row:3; grid-column-start:6">-3</x>
<x style="grid-row:3; grid-column-start:5">-4</x>
<x style="grid-row:3; grid-column-start:4">-5</x>
<x style="grid-row:4; grid-column-start:6">A -1</x>
<x style="grid-row:4; grid-column-start:4">B -1</x>
<x style="grid-row:5; grid-column-start:4">A -2</x>
<x style="grid-row:6; grid-column-start:3">A -3</x>
<x style="grid-row:6; grid-column-start:2">A -4</x>
<x style="grid-row:6; grid-column-start:1">A -5</x>
<x style="grid-row:7; grid-column-start:6">A</x>
<x style="grid-row:7; grid-column-start:9">B</x>
<x style="grid-row:8; grid-column-start:6">A 1</x>
<x style="grid-row:8; grid-column-start:9">A 2</x>
<x style="grid-row:8; grid-column-start:10">A 3</x>
<x style="grid-row:8; grid-column-start:11">A 4</x>
<x style="grid-row:8; grid-column-start:12">A 5</x>
<y style="grid-row:2; grid-column-end:9"></y>
<y style="grid-row:3; grid-column-end:9"></y>
<y style="grid-row:3; grid-column-end:8" class="a5"></y>
<y style="grid-row:3; grid-column-end:7" class="a4"></y>
<y style="grid-row:3; grid-column-end:6" class="a3"></y>
<y style="grid-row:3; grid-column-end:5" class="a2"></y>
<y style="grid-row:4; grid-column-end:7"></y>
<y style="grid-row:4; grid-column-end:5" class="a2"></y>
<y style="grid-row:5; grid-column-end:5"></y>
<y style="grid-row:6; grid-column-end:4"></y>
<y style="grid-row:6; grid-column-end:3" class="a2"></y>
<y style="grid-row:6; grid-column-end:2" class="a3"></y>
<y style="grid-row:7; grid-column-end:7"></y>
<y style="grid-row:7; grid-column-end:10" class="a2"></y>
<y style="grid-row:8; grid-column-end:7"></y>
<y style="grid-row:8; grid-column-end:10" class="a2"></y>
<y style="grid-row:8; grid-column-end:11" class="a3"></y>
<y style="grid-row:8; grid-column-end:12" class="a4"></y>
<y style="grid-row:8; grid-column-end:13" class="a5"></y>
</div>
<pre>grid-column: / span A 2</pre>
<div class="grid t3">
<x style="grid-row:1; grid-column:5; background:grey"></x>
<x style="grid-row:2; grid-column:8/span 2;">-1</x>
<x style="grid-row:3; grid-column:8/span 2;">4</x>
<x style="grid-row:4; grid-column:7/span 3;">-2</x>
<x style="grid-row:5; grid-column:6/span 4;">-3</x>
<x style="grid-row:6; grid-column:5/span 4;">-4</x>
<x style="grid-row:7; grid-column:4/span 5;">-5</x>
<x style="grid-row:8; grid-column:6/span 4;">A -1</x>
<x style="grid-row:9; grid-column:4/span 5;">B -1</x>
<x style="grid-row:10; grid-column:4/span 5;">A -2</x>
<x style="grid-row:11; grid-column:3/span 6;">A -3</x>
<x style="grid-row:12; grid-column:2/span 7;">A -4</x>
<x style="grid-row:13; grid-column:1/span 8;">A -5</x>
<x style="grid-row:14; grid-column:6/span 4;">A</x>
<x style="grid-row:15; grid-column:9/span 1;">B</x>
<x style="grid-row:16; grid-column:6/span 4;">A 1</x>
<x style="grid-row:17; grid-column:9/span 2;">A 2</x>
<x style="grid-row:18; grid-column:10/span 2;">A 3</x>
<x style="grid-row:19; grid-column:11/span 2;">A 4</x>
<x style="grid-row:20; grid-column:12/span 2;">A 5</x>
<y style="grid-row:2; grid-column:8/span 2;"></y>
<y style="grid-row:3; grid-column:8/span 2;"></y>
<y style="grid-row:4; grid-column:7/span 3;"></y>
<y style="grid-row:5; grid-column:6/span 4;"></y>
<y style="grid-row:6; grid-column:5/span 4;"></y>
<y style="grid-row:7; grid-column:4/span 5;"></y>
<y style="grid-row:8; grid-column:6/span 4;"></y>
<y style="grid-row:9; grid-column:4/span 5;"></y>
<y style="grid-row:10; grid-column:4/span 5;"></y>
<y style="grid-row:11; grid-column:3/span 6;"></y>
<y style="grid-row:12; grid-column:2/span 7;"></y>
<y style="grid-row:13; grid-column:1/span 8;"></y>
<y style="grid-row:14; grid-column:6/span 4;"></y>
<y style="grid-row:15; grid-column:9/span 1;"></y>
<y style="grid-row:16; grid-column:6/span 4;"></y>
<y style="grid-row:17; grid-column:9/span 2;"></y>
<y style="grid-row:18; grid-column:10/span 2;"></y>
<y style="grid-row:19; grid-column:11/span 2;"></y>
<y style="grid-row:20; grid-column:12/span 2;"></y>
</div>
</body>
</html>