wpt/css/css-overscroll-behavior/overscroll-behavior-keyboard-scroll-child-frame.html at 95c44efe1431f9eb21ea0b439bb6167fd7b2de8a · web-platform-tests/wpt · GitHub

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<!doctype html>
<meta charset="utf-8">
<title>overscroll-behavior for keyboard scroll in child frame</title>
<meta name="timeout" content="long">
<link rel="help" href="https://drafts.csswg.org/css-overscroll-behavior">
<link rel="author" title="Peng Zhou" href="mailto:zhoupeng.1996@bytedance.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<script src="/css/css-scroll-snap/support/common.js"></script>
<style>
body {
  margin: 0;
}

#container {
  overflow: auto;
  height: 600px;
  position: relative;
}

iframe {
  width: 600px;
  height: 400px;
  position: absolute;
  top: 500px;
}
</style>
<div id="container">
  <iframe id="iframe" src="resources/keyboard-scroll-child-frame-iframe.html"></iframe>
</div>
<script>
window.addEventListener('load', () => {
  promise_test(async () => {
    const target = iframe.contentWindow;
    let scrollEndPromise = waitForScrollEndFallbackToDelayWithoutScrollEvent(container);
    container.scrollTop = 300;
    await scrollEndPromise;

    scrollEndPromise = waitForScrollEndFallbackToDelayWithoutScrollEvent(target);
    target.scrollTo(0, 50);
    await scrollEndPromise;
    assert_equals(target.scrollY, 50);

    await new test_driver.Actions()
      .pointerMove(200, 300)
      .pointerDown()
      .pointerUp()
      .send();
    assert_equals(document.activeElement, iframe);

    scrollEndPromise = waitForScrollEndOrTimeout(target, 1000);
    await scrollElementByKeyboard('ArrowUp');
    await scrollEndPromise;
    assert_equals(container.scrollTop, 300);
    assert_equals(target.scrollY, 0);
  }, 'scrolling is not propagated from iframe to the main frame');
});
</script>