The ascentOverride property of the FontFace interface returns and sets the ascent metric for the font, the height above the baseline that CSS uses to lay out line boxes in an inline formatting context.
The descentOverride property of the FontFace interface returns and sets the value of the descent-override descriptor. The possible values are normal, indicating that the metric used should be obtained from the font file, or a percentage.
The display property of the FontFace interface determines how a font face is displayed based on whether and when it is downloaded and ready to use. This property is equivalent to the CSS font-display descriptor.
The FontFace.family property allows the author to get or set the font family of a FontFace object.
The featureSettings property of the FontFace interface retrieves or sets infrequently used font features that are not available from a font's variant properties.
The lineGapOverride property of the FontFace interface returns and sets the value of the line-gap-override descriptor. The possible values are normal, indicating that the metric used should be obtained from the font file, or a percentage.
ReadonlyloadedThe loaded read-only property of the FontFace interface returns a Promise that resolves with the current FontFace object when the font specified in the object's constructor is done loading or rejects with a SyntaxError.
ReadonlystatusThe status read-only property of the FontFace interface returns an enumerated value indicating the status of the font, one of "unloaded", "loading", "loaded", or "error".
The stretch property of the FontFace interface retrieves or sets how the font stretches.
The style property of the FontFace interface retrieves or sets the font's style.
The unicodeRange property of the FontFace interface retrieves or sets the range of unicode code points encompassing the font.
The variationSettings property of the FontFace interface retrieves or sets low-level OpenType or TrueType font variations.
The weight property of the FontFace interface retrieves or sets the weight of the font.
The load() method of the FontFace interface requests and loads a font whose source was specified as a URL. It returns a Promise that resolves with the current FontFace object.
The
FontFaceinterface of the CSS Font Loading API represents a single usable font face.MDN Reference