Switch from rAF to Promise to fix FOUC in Safari #63
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This fixes the FOUC issue in Safari by switching from
requestAnimationFrame()
toPromise#then()
for the debouncing/batching mechanism.requestAnimationFrame()
causes FOUC in Safari,setTimeout()
causes FOUC in Chrome, whilePromise#then()
ensures micro task enqueueing of styles update before paint in Safari, Chrome, and Firefox.This maintains the same semantics where only the latest call to
updateOnClient()
causes the rendering of styles by "cancelling" the previously created promises by making them noops.Fixes #52
/cc @rauchg @nkzawa