css/cssom-view/scroll-behavior-subframe-window.html

<!DOCTYPE html>
<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on the root of a subframe</title>
<meta name="timeout" content="long"/>
<meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#propdef-scroll-behavior">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#scrolling-box">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/scroll-behavior.js"></script>
<div id="log">
</div>
<iframe id="iframeNode" width="400px" height="200px" srcdoc="<!DOCTYPE>
<html>
  <style>
    body {
      margin: 0;
    }
    .autoBehavior {
      scroll-behavior: auto;
    }
    .smoothBehavior {
      scroll-behavior: smooth;
    }
  </style>
  <body>
    <div style='width: 2000px; height: 1000px; background: linear-gradient(135deg, red, green);'>
      <span style='display: inline-block; width: 500px; height: 250px;'></span><span id='elementToReveal' style='display: inline-block; vertical-align: -15px; width: 10px; height: 15px; background: black;'></span>
    </div>
  </body>
</html>">
</iframe>
<script>
  var iframeLoadTest = async_test("iframe loaded");
  var scrollingWindow, styledElement, elementToReveal;
  var elementToRevealLeft = 500;
  var elementToRevealTop = 250;
  iframeNode.addEventListener("load", iframeLoadTest.step_func_done(() => {
    scrollingWindow = iframeNode.contentWindow;
    styledElement = iframeNode.contentDocument.documentElement;
    elementToReveal = iframeNode.contentDocument.getElementById("elementToReveal");

    ["scroll", "scrollTo", "scrollBy"].forEach((scrollFunction) => {
      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "autoBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, null, elementToRevealLeft, elementToRevealTop);
        assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Should set scrollLeft immediately");
        assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Should set scrollTop immediately");
        return new Promise((resolve) => { resolve(); });
      }, `Main frame with auto scroll-behavior ; ${scrollFunction}() with default behavior`);

      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "autoBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, "auto", elementToRevealLeft, elementToRevealTop);
        assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Should set scrollLeft immediately");
        assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Should set scrollTop immediately");
        return new Promise((resolve) => { resolve(); });
      }, `Main frame with auto scroll-behavior ; ${scrollFunction}() with auto behavior`);

      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "autoBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, "instant", elementToRevealLeft, elementToRevealTop);
        assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Should set scrollLeft immediately");
        assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Should set scrollTop immediately");
        return new Promise((resolve) => { resolve(); });
      }, `Main frame with auto scroll-behavior ; ${scrollFunction}() with instant behavior`);

      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "autoBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, "smooth", elementToRevealLeft, elementToRevealTop);
        assert_less_than(scrollingWindow.scrollX, elementToRevealLeft, "Should not set scrollLeft immediately");
        assert_less_than(scrollingWindow.scrollY, elementToRevealTop, "Should not set scrollTop immediately");
        return waitForScrollEnd(scrollingWindow.document.scrollingElement).then(() => {
          assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Final value of scrollLeft");
          assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Final value of scrollTop");
        });
      }, `Main frame with auto scroll-behavior ; ${scrollFunction}() with smooth behavior`);

      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "smoothBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, null, elementToRevealLeft, elementToRevealTop);
        assert_less_than(scrollingWindow.scrollX, elementToRevealLeft, "Should not set scrollLeft immediately");
        assert_less_than(scrollingWindow.scrollY, elementToRevealTop, "Should not set scrollTop immediately");
        return waitForScrollEnd(scrollingWindow.document.scrollingElement).then(() => {
          assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Final value of scrollLeft");
          assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Final value of scrollTop");
        });
      }, `Main frame with smooth scroll-behavior ; ${scrollFunction}() with default behavior`);

      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "smoothBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, "auto", elementToRevealLeft, elementToRevealTop);
        assert_less_than(scrollingWindow.scrollX, elementToRevealLeft, "Should not set scrollLeft immediately");
        assert_less_than(scrollingWindow.scrollY, elementToRevealTop, "Should not set scrollTop immediately");
        return waitForScrollEnd(scrollingWindow.document.scrollingElement).then(() => {
          assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Final value of scrollLeft");
          assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Final value of scrollTop");
        });
      }, `Main frame with smooth scroll-behavior ; ${scrollFunction}() with auto behavior`);

      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "smoothBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, "instant", elementToRevealLeft, elementToRevealTop);
        assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Should set scrollLeft immediately");
        assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Should set scrollTop immediately");
        return new Promise((resolve) => { resolve(); });
      }, `Main frame with smooth scroll-behavior ; ${scrollFunction}() with instant behavior`);

      promise_test(() => {
        resetScrollForWindow(scrollingWindow);
        setScrollBehavior(styledElement, "smoothBehavior");
        assert_equals(scrollingWindow.scrollX, 0);
        assert_equals(scrollingWindow.scrollY, 0);
        scrollWindow(scrollingWindow, scrollFunction, "smooth", elementToRevealLeft, elementToRevealTop);
        assert_less_than(scrollingWindow.scrollX, elementToRevealLeft, "Should not set scrollLeft immediately");
        assert_less_than(scrollingWindow.scrollY, elementToRevealTop, "Should not set scrollTop immediately");
        return waitForScrollEnd(scrollingWindow.document.scrollingElement).then(() => {
          assert_equals(scrollingWindow.scrollX, elementToRevealLeft, "Final value of scrollLeft");
          assert_equals(scrollingWindow.scrollY, elementToRevealTop, "Final value of scrollTop");
        });
     }, `Main frame with smooth scroll-behavior ; ${scrollFunction}() with smooth behavior`);
    });

    promise_test(() => {
      resetScrollForWindow(scrollingWindow);
      setScrollBehavior(styledElement, "smoothBehavior");
      assert_equals(scrollingWindow.scrollX, 0);
      assert_equals(scrollingWindow.scrollY, 0);
      scrollWindow(scrollingWindow, "scroll", "smooth", elementToRevealLeft, elementToRevealTop);
      scrollWindow(scrollingWindow, "scroll", "smooth", elementToRevealLeft / 2, elementToRevealTop / 2);
      return waitForScrollEnd(scrollingWindow.document.scrollingElement).then(() => {
        assert_equals(scrollingWindow.scrollX, elementToRevealLeft / 2, "Final value of scrollLeft");
        assert_equals(scrollingWindow.scrollY, elementToRevealTop / 2, "Final value of scrollTop");
      });
    }, "Aborting an ongoing smooth scrolling on the main frame with another smooth scrolling");

    promise_test(() => {
      resetScrollForWindow(scrollingWindow);
      setScrollBehavior(styledElement, "smoothBehavior");
      assert_equals(scrollingWindow.scrollX, 0);
      assert_equals(scrollingWindow.scrollY, 0);
      scrollWindow(scrollingWindow, "scroll", "smooth", elementToRevealLeft, elementToRevealTop);
      scrollWindow(scrollingWindow, "scroll", "instant", 0, 0);
      return waitForScrollEnd(scrollingWindow.document.scrollingElement).then(() => {
        assert_equals(scrollingWindow.scrollX, 0, "Final value of scrollLeft");
        assert_equals(scrollingWindow.scrollY, 0, "Final value of scrollTop");
    });
  }, "Aborting an ongoing smooth scrolling on the main frame with an instant scrolling");

  }));
</script>