feat: fonts csp

[florian-lefebvre]

Description (required)

Document new APIs that allow fonts to work with csp

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For Astro version: ???. See astro PR #14154.

(Doesn't require a minor, but won't be ready for 5.13.0 so will release sometime after)

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[sarah11918]

Hey Florian! Just a couple of quick initial questions here to start!

[sarah11918]

Didn't we run into a similar tricky situation documenting something not too long ago where adding any value overrides (and removes) the default that needs to be added back in? 😅 What was that and how did we handle that?

I think what feels off here is that if you do nothing, by default you get the same result as if you added this property with 'self', right? So it's kind of like the default value is 'self' and not nothing?

[florian-lefebvre]

Indeed! FYI I just copied the other properties so they would also need to be updated

Suggested change

	**Default:** `[]`<br />
	**Default:** `["'self'"]`<br />

[sarah11918]

Is this the same situation where doing this overrides and removes 'self'? If so, feels like that should also be mentioned, since it will remove the default?

[florian-lefebvre]

In this case, it's merged with the config so we could show 'self' if we wanted. Maybe @ematipico has an opinion on this!

[sarah11918]

OK, so if this merges that's probably easier to document! We would just make sure that we describe it as "additive"