viewport-resize-event-on-load-overflowing-page.html

<!doctype html>
<html>
    <head>
        <title>Viewport: Resize Event On Load Overflowing Page</title>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, minimum-scale=1">
        <script src="/resources/testharness.js"></script>
        <script src="/resources/testharnessreport.js"></script>
        <script src="viewport_support.js"></script>
        <script>
            var t = async_test(
                "Resize event fired exactly once against window.visualViewport if " +
                "scrollbars affect layout.");
            t.step(() => {
              // Run the test in a new window to make sure we don't pick up
              // a resize event due to a previous page having a different scale.
              var win = window.open("helper-resize-event-on-load-overflowing-page.html");
              t.add_cleanup(() => win.close());
            });
        </script>
    </head>
    <body>
    <h1>Viewport: Resize Event On Load Overflowing Page</h1>
    <h4>
        Test Description: This test ensures that we fire a resize event against
        window.visualViewport if the page has overflow (since this creates a scrollbar
        and thus changes the viewport size).
    </h4>
    <div id="log"></div>
    </body>
</html>

chromium/third_party/blink/web_tests/external/wpt/visual-viewport/viewport-resize-event-on-load-overflowing-page.html