css/css-grid/masonry/tentative/item-placement/masonry-rows-item-placement-auto-flow-next-001.html

<!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 masonry rows masonry-auto-flow next</title>
  <link rel="author" title="Sammy Gill" href="mailto:sammy.gill@apple.com">
  <link rel="help" href="https://drafts.csswg.org/css-grid-3/#masonry-auto-flow">
  <link rel="match" href="masonry-rows-item-placement-auto-flow-next-001-ref.html">
  <meta name="assert" content="Placing item that would span outside the grid using masonry-auto-flow-next should place the item at the first grid axis track" />
  <style>
html,body {
  color:black; background-color:white; font:25px/1 monospace; padding:0; margin:0;
}

grid {
  display: inline-grid;
  gap: 10px 20px;
  grid-template-columns: repeat(4,80px);
  grid-template-rows: masonry;
  color: #444;
  border: 1px solid;
  padding: 2px;
  masonry-auto-flow: next;
}

item {
  background-color: #444;
  color: #fff;
  padding: 20px;
  margin: 3px;
  border: 5px solid blue;
}
</style>
</head>
<body>

<grid>
  <item>1</item>
  <item style="grid-column: span 3">2</item>
  <item>3</item>
  <item style="grid-column: span 4">4</item>
</grid>

</body>
</html>