"
When a font face enters the failure period, it’s marked as a failed load and cause normal font fallback, but it may still be loading. Should the status attribute of the FontFace remain "loading", or set to "error"?

[...]

It becomes "loaded" when the continued download finishes
 [...]
 - FontFaceSet.check() may return true for such "loaded" font faces
"

Tab: >> I don't think we want this. We probably want the "check" algo to pay attention to whether the font is treated as failed.

https://github.com/tabatkins/specs/issues/48#issuecomment-265670180