contain-strict-subgrid.html

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<!DOCTYPE html>

<head>

<title>contain: strict element with subgrid properties</title>

<link rel="author" title="Mozilla" href="https://mozilla.org">

<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1606485">

</head>

<style>

#gridcontainer {

  display: grid;

  contain: strict;

.item {

  display: grid;

  grid: subgrid [x] / subgrid [x];

</style>

<div id="gridcontainer">

<div class="item">Text1</div>

</div>