A CSS-only way to update CSS variables in real time using range slider

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CSS Tip

Learn how to link a CSS variable with a range slider to update its value in real-time using scroll-driven animations, without the need for JavaScript. Includes a demo showcasing the technique, currently compatible with Chrome only.

Update CSS variables using range slider

Nice post and thanks for sharing!
As a tip for the future: the code example could’ve been a lot better by using better naming. --_f means nothing to me and my brain has to use resources to process what’s happening here that is not needed :).

FYI it is working in chrome browser, but not in Firefox ;)

How comes that the boldest is not really the boldest? ;)