The keys() method of the FontFaceSet interface is an alias for FontFaceSet.values.
The keys() method of the FontFaceSet interface is an alias for FontFaceSet.values.
js
keys()
None.
A new iterator object containing the values for each element in the given FontFaceSet, in insertion order.
No specification data found for api.FontFaceSet.keys.
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keys | 
48 | 79 | 41 | No | 35 | 10 | 48 | 48 | 41 | 35 | 10 | 5.0 | 
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    https://developer.mozilla.org/en-US/docs/Web/API/FontFaceSet/keys