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chromium/third_party/blink/web_tests/external/wpt/css/css-page/page-margin-001-print-ref.html 

<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:[email protected]">
<style>
  @page {
    margin: 0;
  }
  body {
    margin: 0;
  }
  .fullpager {
    break-before: page;
    margin-top: 10px;
    margin-left: 40px;
    width: calc(100vw - 60px);
    height: calc(100vh - 40px);
  }
</style>
<div class="fullpager" style="background:yellow;">
  first page
</div>
<div class="fullpager" style="background:cyan;">
  second page
</div>
<div class="fullpager" style="background:pink;">
  third page
</div>