I'd recommend something with a bit more of a hook to get people to read the article; Dark/Light theme switchers are a very common thing and don't really work well to grab attention.
Another nitpick: Some people (including me) block cookies and other storage by default, so it might be worth adding a check for that so the switcher still works, albeit without persistence.
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"dark mode with every technology on the web only"
NGL that title is a bit funny xD
I'd recommend something with a bit more of a hook to get people to read the article; Dark/Light theme switchers are a very common thing and don't really work well to grab attention.
Another nitpick: Some people (including me) block cookies and other storage by default, so it might be worth adding a check for that so the switcher still works, albeit without persistence.