Based on Chromium issue - https://crbug.com/852938 - const input = document.createElement('input'); input.type = 'range'; input.min = 0; input.max = 10; document.body.appendChild(input); requestAnimationFrame(() => { requestAnimationFrame(() => { input.setAttribute('value', 2); }); }); See the recently added web-platform-test - https://crrev.com/ffdff57271ad1e77d0a277b95f0fbb6ebd02354b/third_party/blink/web_tests/external/wpt/html/semantics/forms/the-input-element/range-setattribute-value.html The issue also has a small patch that can likely be ported to WebKit - https://chromium.googlesource.com/chromium/src.git/+/ffdff57271ad1e77d0a277b95f0fbb6ebd02354b
<rdar://problem/56204271>
Created attachment 382100 [details] Patch
Created attachment 382126 [details] Patch
Created attachment 382182 [details] Patch
Comment on attachment 382182 [details] Patch Rejecting attachment 382182 [details] from commit-queue. Failed to run "['/Volumes/Data/EWS/WebKit/Tools/Scripts/webkit-patch', '--status-host=webkit-queues.webkit.org', '--bot-id=webkit-cq-03', 'land-attachment', '--force-clean', '--non-interactive', '--parent-command=commit-queue', 382182, '--port=mac']" exit_code: 2 cwd: /Volumes/Data/EWS/WebKit Logging in as commit-queue@webkit.org... Fetching: https://bugs.webkit.org/attachment.cgi?id=382182&action=edit Fetching: https://bugs.webkit.org/show_bug.cgi?id=202859&ctype=xml&excludefield=attachmentdata Processing 1 patch from 1 bug. Updating working directory Processing patch 382182 from bug 202859. Fetching: https://bugs.webkit.org/attachment.cgi?id=382182 Failed to run "[u'/Volumes/Data/EWS/WebKit/Tools/Scripts/svn-apply', '--force', '--reviewer', u'Fr\xe9d\xe9ric Wang']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit Parsed 5 diffs from patch file(s). patching file Source/WebCore/ChangeLog Hunk #1 succeeded at 1 with fuzz 3. patching file Source/WebCore/html/RangeInputType.cpp patching file LayoutTests/ChangeLog Hunk #1 succeeded at 1 with fuzz 3. patching file LayoutTests/TestExpectations Hunk #1 FAILED at 3940. 1 out of 1 hunk FAILED -- saving rejects to file LayoutTests/TestExpectations.rej patching file LayoutTests/platform/mac-wk1/TestExpectations Hunk #1 succeeded at 795 (offset -4 lines). Hunk #2 succeeded at 817 (offset -4 lines). Failed to run "[u'/Volumes/Data/EWS/WebKit/Tools/Scripts/svn-apply', '--force', '--reviewer', u'Fr\xe9d\xe9ric Wang']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit Parsed 5 diffs from patch file(s). patching file Source/WebCore/ChangeLog Hunk #1 succeeded at 1 with fuzz 3. patching file Source/WebCore/html/RangeInputType.cpp patching file LayoutTests/ChangeLog Hunk #1 succeeded at 1 with fuzz 3. patching file LayoutTests/TestExpectations Hunk #1 FAILED at 3940. 1 out of 1 hunk FAILED -- saving rejects to file LayoutTests/TestExpectations.rej patching file LayoutTests/platform/mac-wk1/TestExpectations Hunk #1 succeeded at 795 (offset -4 lines). Hunk #2 succeeded at 817 (offset -4 lines). Failed to run "[u'/Volumes/Data/EWS/WebKit/Tools/Scripts/svn-apply', '--force', '--reviewer', u'Fr\xe9d\xe9ric Wang']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit Updating OpenSource From https://git.webkit.org/git/WebKit 730cced3b0f..912eb638a48 master -> origin/master Partial-rebuilding .git/svn/refs/remotes/origin/master/.rev_map.268f45cc-cd09-0410-ab3c-d52691b4dbfc ... Currently at 251712 = 730cced3b0f48f0c2e61c09e4be19b1f16995f95 r251713 = 31bd6e34ed1a40acc82db9d64ef851317f893826 r251714 = 8418af8a2662b3d5d40dbccd8de722eb72c5603b r251715 = ea7ae235842f31baccbba9284196a7a9a5847e6a r251716 = 912eb638a4835635f9adcb01998737ec43e72445 Done rebuilding .git/svn/refs/remotes/origin/master/.rev_map.268f45cc-cd09-0410-ab3c-d52691b4dbfc First, rewinding head to replay your work on top of it... Fast-forwarded master to refs/remotes/origin/master. Full output: https://webkit-queues.webkit.org/results/13188833
Committed r251718: <https://trac.webkit.org/changeset/251718>