<!doctype html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-element-scrollwidth">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-element-scrollheight">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1936156">
<title>scroll{Width,Height} shouldn't account for collapsed margins, in order not to report unnecessary overflow</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  #target div {
    height: 20px;
    min-width: 20px;
    background-color: green;
    margin: 20px 10px;
  }
</style>
<div id="target">
  <div>
    <div></div>
  </div>
  <div></div>
  <div></div>
  <div></div>
</div>
<script>
let target = document.getElementById("target");
// "clip" is not really scrollable, but should match as well.
for (let overflow of ["visible", "hidden", "auto", "scroll", "clip"]) {
  for (let padding of ["0", "2px"]) {
    for (let border of ["0", "3px solid"]) {
      for (let display of ["flex", "block", "flow-root", "inline-block", "inline-flex", "grid", "inline-grid"]) {
        test(function() {
          target.style.overflow = overflow;
          target.style.display = display;
          target.style.border = border;
          target.style.padding = padding;
          let sh = target.scrollHeight;
          let sw = target.scrollWidth;
          let ch = target.clientHeight;
          let cw = target.clientWidth;
          assert_equals(sh, ch, "scrollHeight should match clientHeight, since there's no overflow");
          assert_equals(sw, cw, "scrollWidth should match clientWidth, since there's no overflow");
        }, `scroll{Width,Height} with margins should match client{Width,Height} if there would be no overflow width overflow: ${overflow}, padding: ${padding}, border: ${border}, display: ${display}`);
      }
    }
  }
}
</script>