Should persistence be customisable?

[Kilian]

There are a few ways these settings could be set/saved, and it might make sense for this to be configurable:

Overwrites apply to: page/domain/host
Overwrites apply for the: session/permanently

[lukewarlow]

My intention is for it to apply for the whole origin and for it to apply permanently. I've updated the explainer to call this out and add the others as a question

[lukewarlow]

Reopening this to further any discussion that may be needed.

[lukewarlow]

Some sites update the theme until the next time the system changes. The API as it stands won't support that.

Is this a use case we want to support?

[lukewarlow]

Wrt my previous comment the new/old requestOverride() function shape is such that an options object could be added that has a way to control the persistence.

Strawman:

navigator.preferences.colorScheme.requestOverride("dark", {persist: false})

[lukewarlow]

https://x.com/claviska/status/1771898152792043591?s=20 - provides an example of how you might want different behaviour for different types of site.

[Kilian]

A trinary option is what I have on https://colorcontrast.app as well.