window.print() changes theme to light mode

[oncet]

Theme changes to light when calling window.print() if current theme is set to system and resolvedTheme is set to dark (i.e. OS is set to dark mode). After closing the print dialog the theme returns to dark. Using cmd + p doesn't affect the current theme.

Only seems to happen when using the Pages Router.

Here is a CodeSandbox to try it out:

• https://codesandbox.io/p/sandbox/next-js-pages-next-themes-llztw6

Not sure if this is a bug or an un-documented feature.

Maybe related to #6.

[trm217]

I would assume that window.print() causes a re-render of the page that doesn't execute JS and therefor doesn't apply the dark-mode attribute and therefor doesn't update the colors.
Closing for now :)