How do you implement Dark Mode safely using HTML and CSS?

Question

I am building a web portal with a heavy text interface. How do I allow users to toggle a dark theme without flashing bright screens on reload?

PixelPerfect · Answer

Use the prefers-color-scheme media query in your CSS to detect the user's OS preference by default. For a manual toggle, use JavaScript to set a data-theme=\dark\" attribute on the root <html> tag and store their choice in localStorage to persist the setting across page loads."""

How do you implement Dark Mode safely using HTML and CSS?

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