Bug 135390

Summary: [CSS Font Loading][meta] Implement CSS Font Loading
Product: WebKit Reporter: Bear Travis <betravis>
Component: CSSAssignee: Myles C. Maxfield <mmaxfield>
Severity: Normal CC: fred.wang, jdaggett, lmcliste, mmaxfield, simon.fraser, stein, syoichi, webkit-bug-importer
Priority: P2 Keywords: InRadar, WebExposed
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
URL: http://dev.w3.org/csswg/css-font-loading/
See Also: https://bugs.webkit.org/show_bug.cgi?id=153346
Bug Depends on: 98395, 112116, 135340, 135393, 135420, 135473, 136044, 136501, 136502, 136504, 136505, 137401, 138755, 158884    
Bug Blocks:    

Description Bear Travis 2014-07-29 10:46:57 PDT
Implement the CSS Font Loading specification. There is already an older implementation in place. The new work is to update it to the current spec and enable it.
Comment 1 John Daggett 2014-08-04 22:44:30 PDT
The spec has changed radically since the initial implementation work was done. Specifically, the Font Loading API is now Promise-based, so the update will be a non-trivial amount of work.

Latest spec:
Comment 2 Radar WebKit Bug Importer 2014-09-02 11:24:15 PDT
Comment 3 Bram Stein 2015-12-18 07:53:23 PST
We (Adobe Typekit) are using this API quite heavily in our "kits" to detect font load events. If this API were supported by WebKit, we could avoid the expensive fallback strategy of polling a element for its width every N milliseconds.

It would be great if this feature received some attention.

For reference, I've described our use of the API in more detail here:

Comment 4 Myles C. Maxfield 2015-12-18 09:14:16 PST
Assigning to myself.
Comment 5 Myles C. Maxfield 2016-06-20 14:32:02 PDT

*** This bug has been marked as a duplicate of bug 153346 ***