Incorrect spacing between f and i in Fira Mono

[romiem]

As shown in this article, the 'fi' in Sofia, has incorrect spacing between the letters. Even increasing the letter-spacing CSS property through Chrome Inspector fails to add the correct spacing.

http://abduzeedo.com/sofia-luxury-residence-branding

[jfkthame]

That's not (incorrect) spacing, it's an "fi" ligature. Which isn't really appropriate in a monospaced font, and I believe it has been removed from the current version. That site appears to be using the Google Fonts service, and I guess they're still deploying an old release.

(See also issue #14.)

[easyaspi314]

I don't know about that…

I am pretty sure latest has that; but it is discretionary.
On May 25, 2016 8:21 AM, "jfkthame" notifications@github.com wrote:

That's not (incorrect) spacing, it's an "fi" ligature. Which isn't really
appropriate in a monospaced font, and I believe it has been removed from
the current version. That site appears to be using the Google Fonts
service, and I guess they're still deploying an old release.

(See also issue 14.)

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#170 (comment)

[jfkthame]

But the page indicated above doesn't enable discretionary ligatures, so the fact that it's appearing shows that they're using a font where it is present in the on-by-default 'liga' feature. That shouldn't be the case in the current release, afaik.

[romiem]

@jfkthame How were you able to determine if the page above was using discretionary ligatures? Is it configured via a CSS property or perhaps via a querystring parameter when calling the Google Fonts API?

[jfkthame]

In Firefox, you can use the Element Inspector to tinker with CSS properties; if you set

font-variant-ligatures: no-common-ligatures;

on the title element where "Sofia" has the unwanted ligature, you'll see that it decomposes; which indicates that this ligature comes from a Common Ligatures feature in the font.

(Equivalently, setting

font-feature-settings: "liga" off;

would do the same thing, using the low-level OpenType feature tag.)

[romiem]

@jfkthame Learn something new everyday! Thanks :)