FontFaceSet.add()

The add() method of the FontFaceSet interface adds a new font to the set.

font

A FontFace to be added to the set.

A new FontFaceSet.

DOMException InvalidModificationError

Thrown if this font is already included via the CSS @font-face rule.

In the following example a new FontFace object is created and then added to the FontFaceSet.

let font = new FontFace('MyFont', 'url(myFont.woff2)');
document.fonts.add(font);