[Webkit-unassigned] [Bug 181048] Background image with background-attachment: local inside -webkit-overflow-scrolling: touch fails to display until viewport zoom

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=181048

--- Comment #6 from Jayden Seric <me at jaydenseric.com> ---
I've discovered that updating a CSS variable on a -webkit-overflow-scrolling: touch element when it’s scrolled causes it to repaint correctly. I use React hooks, but here is a vanilla example:

if (CSS.supports('-webkit-overflow-scrolling: touch')) {
  const scroller = document.getElementById('scroller')
  scroller.addEventListener('scroll', () => {
    scroller.style.setProperty('--force-paint', Date.now())
  })
}

This is a very inconvenient bug!

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