| OLD | NEW |
|---|
| (Empty) |
| 1 <!DOCTYPE html> | |
| 2 <script src="../../../resources/testharness.js"></script> | |
| 3 <script src="../../../resources/testharnessreport.js"></script> | |
| 4 <style> | |
| 5 | |
| 6 body { margin: 0; height: 5000px; } | |
| 7 #evil { height: 200px; width: 200px; background-color: #fcc; } | |
| 8 | |
| 9 </style> | |
| 10 <div id="evil"></div> | |
| 11 <script> | |
| 12 | |
| 13 internals.runtimeFlags.scrollAnchoringEnabled = true; | |
| 14 | |
| 15 var kMaxAdjustments = 20; // Keep in sync with kMaxAdjustments in ScrollAnchor.c
pp | |
| 16 | |
| 17 var evil = document.querySelector('#evil'); | |
| 18 onscroll = () => { evil.style.marginTop = scrollY + "px"; }; | |
| 19 | |
| 20 var frame = () => new Promise((resolve) => { requestAnimationFrame(resolve); }); | |
| 21 | |
| 22 var waitFor = function(condition, failmsg, deadline) { | |
| 23 if (!deadline) deadline = Date.now() + 1000; | |
| 24 if (condition()) return Promise.resolve(); | |
| 25 else if (Date.now() > deadline) return Promise.reject(failmsg); | |
| 26 else return frame().then(() => waitFor(condition, failmsg, deadline)); | |
| 27 }; | |
| 28 | |
| 29 var waitFrames = function(n, condition, failmsg) { | |
| 30 var p = Promise.resolve(); | |
| 31 var check = () => (!condition || condition() ? | |
| 32 Promise.resolve() : Promise.reject(failmsg)); | |
| 33 while (n--) | |
| 34 p = p.then(check).then(frame); | |
| 35 return p.then(check); | |
| 36 }; | |
| 37 | |
| 38 var scrollSettlesAt = function(expectedY) { | |
| 39 return waitFor(() => (scrollY == expectedY), | |
| 40 "scroll did not reach " + expectedY) | |
| 41 .then(() => waitFrames(3)) | |
| 42 .then(() => waitFrames(3, () => (scrollY == expectedY), | |
| 43 "scroll did not stay at " + expectedY)); | |
| 44 }; | |
| 45 | |
| 46 promise_test(function() { | |
| 47 var y = 10; | |
| 48 return Promise.resolve() | |
| 49 .then(() => { scrollTo(0, y); }) | |
| 50 .then(() => scrollSettlesAt(y + kMaxAdjustments * y)); | |
| 51 }, "Scroll anchoring with scroll event handler feedback loop"); | |
| 52 | |
| 53 </script> | |
| OLD | NEW |
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Chromium Code Reviews
Issue 2250523003:
Implement SANACLAP (http://bit.ly/sanaclap). (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master