<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#last-remembered">
<title>Tests that contain-intrinsic-size: auto only works with content-visibility: auto, not just size containment</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<div id="log"></div>

<div style="height: 2000px;"></div>

<div style="contain-intrinsic-size: auto 1px;" id="test">
  <div style="height: 50px;"></div> <!-- make 'test' have a 50px height -->
</div>

<script>
function finalize() {
  el.style.contain = "size";
  log.innerText = el.offsetHeight;
  // No content-visibility: auto, so this should remain 1.
  assert_equals(el.offsetHeight, 1);
}

var t = async_test("contain-intrinsic-size: auto");

var log = document.getElementById("log");
var el = document.getElementById("test");
var observer = new ResizeObserver(function() {
  requestAnimationFrame(t.step_func_done(finalize));
  observer.unobserve(el);
});

observer.observe(el);
el.offsetWidth;

</script>
