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Progressively-enhanced dark mode
Darin Senneff writes an incredibly in depth article about his progressively enhanced dark mode toggler.
Darin opts for a HTML form with three radio buttons: ‘auto’, ‘light’ and ‘dark’. The ‘auto’ option looks at the user’s operating system level preferences, i.e. serving light mode by default, but with a
prefers-color-scheme media query that overrides to dark mode if that is the user’s theme preference.
If the user makes an active choice by submitting the form, he saves their preference in a session cookie, which persists as the user navigates around the site. He also keeps the selected theme pre-checked in the form, so it’s clear to the user which option they have selected. The explicit choice is used to apply a
data-theme="dark" attribute on the root
<html> element, and leads to some unavoidable CSS duplication as we now need to style based on the data attribute or user device theme.
The user’s choice is now persisted in
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