font-face-render-check
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Updating how the font loaded via data-uri is called
Recently, on some OSes (like MacOS Monterey), the check using the truetype font via data-uri started throwing the following error (provided by Firefox v93.0):
downloadable font: not usable by platform (font-family: "pixelambacht" style:normal weight:400 stretch:100 src index:0) source: data:font/truetype;base64,AAEAAAALAIAAAwAwT1MvMghABuMAAAC8AAAAYGNtYXAAlQDaAAABHAAAAGRnYXNw//8ABAAAAYAAAAAIZ2x5Zv8nt3kAAAGIAAAATG … AQQJAAQAAgAOAAMAAQQJAAUAAAAAAAMAAQQJAAYAAAAAAAMAAQQJAAoAAAAAAAD+/wBy/v8Ab/7/AGX+/wBsAAMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
This was resulting in the check failing when it should have been passing.
Updating how the data-uri was set to include things like format()
seemed to resolve the errors, but Firefox was still warning:
downloadable font: no supported format found (font-family: "pixelambacht" style:normal weight:400 stretch:100 src index:1) source: (end of source list)
... and the check was still failing when it should have been passing.
Changing to use the WOFF font instead of the TrueType font resolved the warning, and allowed the check to work properly again.