Throttle the rendering pipeline during page load when there's pending sheets.

Category: CSS
Type: New or changed feature
Status: Enabled by default (Chrome 56)
Intent stage: None

Summary

Delay running the rendering pipeline (style, layout, paint) and executing requestAnimationFrame callbacks inside iframes until pending stylesheets have finished loading.

Standards & signals

Firefox: No signal
Safari: No signal
Web developers: Positive
Tracking bug: http://crbug.com/663193

Docs: https://docs.google.com/document/d/1waQggCtPb44gwTp8PK5iz4B-YTiSOSBqbqtbopNrxNA/edit

Samples: https://www.elliottsprehn.com/examples/iframe-fouc-raf/?delay=500

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