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Re: [csswg-drafts] [css-fonts] Consider specifying UA should not perform system fallback for Unicode PUA

From: Dominik Röttsches via GitHub <sysbot+gh@w3.org>
Date: Mon, 18 Dec 2017 14:04:32 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-352434171-1513605871-sysbot+gh@w3.org>
> How would the (U+F8FF Apple Logo) character work? I don’t think anyone explicitly lists the specific font it’s in.

I guess if we standardize the recommendation as "should", you could make an exception for U+F8FF? Or use 🍏 + VS15? Or propose to standardize something in Unicode, e.g. GENERIC CORP LOGO + TAG SEQUENCE...TAG TERM for corporate logos? 

On a more serious note: The background for this proposal is that the PUA semantics are defined to be custom to the font - using system wide fallback for them is highly unlikely to return meaningful results to avoid .notdef's.

> Does any browser currently have this proposed behavior?

[We're implementing it in Blink](https://bugs.chromium.org/p/chromium/issues/detail?id=795225) after we discovered that we occasionally receive unsuitable fallback results from the system when querying for PUA codepoints while for example a web icon font has not loaded yet.


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Received on Monday, 18 December 2017 14:04:34 UTC

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