File: change-layout-in-error.html

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<!doctype HTML>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<style>
  div {
    width: 100px;
    height: 100px;
  }
</style>
<div id="observeme"></div>

<script>
setup({allow_uncaught_exception: true});

async_test(a => {
  let t = document.querySelector("#observeme");
  let i = 0;
  window.onerror = function (err) {
    t.style.height = "112px";
    i++;
    requestAnimationFrame(a.step_func_done(() => {
      assert_equals(i, 1);
    }), 0);
  };

  new ResizeObserver(function() {
    t.style.height = "111px";
  }).observe(observeme);
  observeme.style.height = "110px";

}, "Changing layout in window error handler should not result in lifecyle loop when resize observer loop limit is reached.");
</script>