css/css-break/grid/monolithic-overflow-print-ref.html

<!DOCTYPE html>
<link rel="author" title="Psychpsyo" href="mailto:psychpsyo@gmail.com" />
<style>
  :root {
    print-color-adjust: exact;
  }
</style>
<p style="height: 50vh">Test passes if there is two purple rectangles at the start of both page 2 and 3 when printing the page (Ctrl+P, with "print backgrounds" enabled).</p>
<div style="display:grid; grid-template-columns:1fr 1fr; break-before:page;">
  <div style="contain:size; height:75vh;">
    <div style="height:75vh; width: 100px; background:purple;"></div>
  </div>
  <div style="contain:size; height:75vh;">
    <div style="height:75vh; width: 100px; background:purple;"></div>
  </div>
</div>
<div style="display:grid; grid-template-columns:1fr 1fr; break-before:page;">
  <div style="contain:size; height:75vh;">
    <div style="height:75vh; width: 100px; background:purple;"></div>
  </div>
  <div style="contain:size; height:75vh;">
    <div style="height:75vh; width: 100px; background:purple;"></div>
  </div>
</div>