1072762 - implement the FontFaceSet constructor

Status: NEW

(Core :: CSS Parsing and Computation, defect)

Description

[Cameron McCormack (:heycam)]

The CSS Font Loading API allows the creation of separate FontFaceSet objects not tied to a document.  We don't implement that yet (and we might want to push back on that since I'm not sure how useful it is to be honest).

Comment 1

[Andrew Kaster]

This feature request is now a web branding problem.

Running the following snippet in the js console has different behavior in each major browser:

let f = new FontFaceSet([]);

In Safari 17.5 (macOS 14.5):

• Returns a new FontFaceSet with no initial fonts

In Chromium 124.0.6367.207 (snap, Ubuntu 22.04):

• ReferenceError: FontFaceSet is not defined. The interface is not exposed to JS, but the type is visible when logging document.fonts

In Firefox 125.0.2 (snap, Ubuntu 22.04):

• TypeError: Illegal constructor.

Comment 2

[BugBot [:suhaib / :marco]]

Redirect a needinfo that is pending on an inactive user to the triage owner.
:emilio, since the bug has recent activity, could you have a look please?

For more information, please visit BugBot documentation.

Comment 3

[Emilio Cobos Álvarez [:emilio]]

https://issues.chromium.org/issues/40287940 indicates that this is probably worth trying to remove from the spec.