> constants Constants which you can redefine/shadow in scopes, and change the va...

marcosdumay · 2026-01-06T03:53:10 1767671590

> and change the values of at runtime via JS

No, you can't. You can set a new value and reevaluate everything.

the_other · 2026-01-06T18:23:15 1767723795

I’m dumb and don’t understand the distinction you’re making.

    elem.style.setProperty(‘—var-name’, newValue);

… will set a new value for the “constant”. The element will rerender with the new value. You can animate/automate these changes and the element will continue to rerebder with the updated value.

To me, that justifies the name “variable” from the perspective of the CSS.