third_party/WebKit/LayoutTests/fast/layout/scroll-anchoring/suppressions-are-per-frame.html - Issue 2404393003: Tie scroll anchoring adjustments to frame lifecycle instead of layout.

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Side by Side Diff: third_party/WebKit/LayoutTests/fast/layout/scroll-anchoring/suppressions-are-per-frame.html

Issue 2404393003: Tie scroll anchoring adjustments to frame lifecycle instead of layout. (Closed)

Patch Set: address review comments Created 4 years, 2 months ago

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	1 <!DOCTYPE html>

	2 <script src="../../../resources/run-after-layout-and-paint.js"></script>

	3 <script src="../../../resources/testharness.js"></script>

	4 <script src="../../../resources/testharnessreport.js"></script>

	5 <style>

	6 body { height: 1000px }

	7 div { height: 100px }

	8 </style>

	9 <div id="block1">abc</div>

	10 <div id="block2">def</div>

	11 <script>

	12 // This test verifies that SANACLAP suppressions (http://bit.ly/sanaclap)

	13 // apply to all layout passes in an animation frame, not just the one that

	14 // sets the SANACLAP bit on the ScrollAnchor.

	15 async_test((t) => {

	16 scrollTo(0, 150);

	17 runAfterLayoutAndPaint(() => {

	18 // By itself this would trigger a scroll anchoring adjustment.

	19 document.querySelector("#block1").style.height = "200px";

	20

	21 // Force synchronous layout.

	22 document.body.offsetHeight;

	23

	24 // Trigger SANACLAP suppression.

	25 document.body.style.paddingTop = "20px";

	26

	27 runAfterLayoutAndPaint(() => {

	28 assert_equals(scrollY, 150);

	29 t.done();

	30 });

	31 });

	32 }, 'Suppressions apply to the entire frame.');

	33 </script>

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