The appearance style can be applied to any non <input> element like this this one: <style> html { appearance: slider-vertical; } </style> In 258522@main createSliderTrackPartForRenderer() was refactored from RenderTheme::paintSliderTicks() which makes an early return "if (!is<HTMLInputElement>(o.node()))". We need to port this check to createSliderTrackPartForRenderer().
rdar://104019874
Pull request: https://github.com/WebKit/WebKit/pull/8411
Committed 258684@main (c14ea6ce8716): <https://commits.webkit.org/258684@main> Reviewed commits have been landed. Closing PR #8411 and removing active labels.