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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Test: Subgridded item placement invalidation</title>
<link rel="author" title="Ethan Jimenez" href="mailto:ethavar@microsoft.com">
<link rel="help" href="https://drafts.csswg.org/css-grid-2/#track-sizing">
<style>
html, body {
margin: 0;
padding: 0;
}
#grid {
width: 200px;
display: grid;
background: lightgray;
grid-template-columns: [start] auto [end] 1fr;
grid-template-rows: 100px;
}
#subgrid {
display: grid;
grid-column: 1 / -1;
grid-template-columns: subgrid;
}
#item {
width: 50px;
background: lightblue;
border: 5px solid gray;
grid-column: start / end;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<div id="grid">
<div id="subgrid">
<div id="item" data-offset-x="140"></div>
</div>
</div>
<script>
"use strict";
let grid = document.getElementById("grid");
let item = document.getElementById("item");
// Computing an offset forces layout.
let item_offset = item.offsetLeft;
grid.style.gridTemplateColumns = "1fr [start] auto [end]";
item_offset = item.offsetLeft;
checkLayout("#item");
</script>
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