<!doctype html>
<title>@container: originating element container for pseudo elements</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-queries">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
  .container { container-type: inline-size; }
  #target { display: list-item; }
  @container (max-width: 200px) {
    #target::before { content: "PASS"; color: green; }
    #target::after { color: green; }
    #target::marker { color: green; }
    #target::first-line { color: green; }
    #target::first-letter { color: green; }
  }
  @container ((min-width: 300px) and (max-width: 350px)) {
    #outer::first-line { color: green; }
    #outer::first-letter { color: green; }
  }
  dialog::backdrop { background-color: lime; }
  @container (max-width: 100px) {
    dialog::backdrop { background-color: green; }
  }
</style>
<div style="width: 400px" class="container">
  <div style="width: 300px" class="container">
    <div id="target" class="container" style="width: 200px">First-line</div>
    <dialog id="dialog" class="container" style="width: 100px"></dialog>
  </div>
  <div style="width: 400px" class="container">
    <div id="outer" style="width: 300px" class="container">
      <div class="container" style="width: 200px">First-line</div>
  </div>
</div>
<script>
  setup(() => assert_implements_container_queries());

  const green = "rgb(0, 128, 0)";
  const lime = "rgb(0, 255, 0)";

  test(() => {
    assert_equals(getComputedStyle(target, "::before").color, green);
  }, "Originating element container for ::before");
  test(() => {
    assert_equals(getComputedStyle(target, "::after").color, green);
  }, "Originating element container for ::after");
  test(() => {
    assert_equals(getComputedStyle(target, "::marker").color, green);
  }, "Originating element container for ::marker");
  test(() => {
    assert_equals(getComputedStyle(target, "::first-line").color, green);
  }, "Originating element container for ::first-line");
  test(() => {
    assert_equals(getComputedStyle(target, "::first-letter").color, green);
  }, "Originating element container for ::first-letter");
  test(() => {
    assert_equals(getComputedStyle(outer, "::first-line").color, green);
  }, "Originating element container for outer ::first-line");
  test(() => {
    assert_equals(getComputedStyle(outer, "::first-letter").color, green);
  }, "Originating element container for outer ::first-letter");
  test((t) => {
    t.add_cleanup(() => dialog.close());
    assert_equals(getComputedStyle(dialog, "::backdrop").backgroundColor, lime, "::backdrop not rendered");
    dialog.showModal();
    assert_equals(getComputedStyle(dialog, "::backdrop").backgroundColor, green, "::backdrop rendered");
  }, "Originating element container for ::backdrop");
</script>
