Note: This feature is available in Web Workers.
The FontFaceSet interface of the CSS Font Loading API manages the loading of font-faces and querying of their download status.
A FontFaceSet instance is a Set-like object that can hold an ordered set of FontFace objects.
This property is available as Document.fonts, or self.fonts in web workers.
FontFaceSet.status Read onlyIndicates the font-face's loading status. It will be one of 'loading' or 'loaded'.
FontFaceSet.ready Read onlyPromise which resolves once font loading and layout operations have completed.
FontFaceSet.size Read onlyReturns the number of values in the FontFaceSet.
loadingFires when a font-face set has started loading.
loadingdoneFires when a font face set has finished loading.
loadingerrorFires when an error occurred while loading a font-face set.
FontFaceSet.add()Adds a font to the font set.
FontFaceSet.check()A boolean value that indicates whether a font is loaded, but doesn't initiate a load when it isn't.
FontFaceSet.clear()Removes all manually-added fonts from the font set. CSS-connected fonts are unaffected.
FontFaceSet.delete()Removes a manually-added font from the font set. CSS-connected fonts are unaffected.
FontFaceSet.entries()Returns a new iterator with the values for each element in the FontFaceSet in insertion order.
FontFaceSet.forEach()Executes a provided function for each value in the FontFaceSet object.
FontFaceSet.has()Returns a Boolean asserting whether an element is present with the given value.
FontFaceSet.keys()An alias for FontFaceSet.values().
FontFaceSet.load()Returns a Promise which resolves to a list of font-faces for a requested font.
FontFaceSet.values()Returns a new iterator object that yields the values for each element in the FontFaceSet object in insertion order.