Provide Custom CSS per Style Variation

[pbking]

What problem does this address?

Certain style variations may be better enhanced by having CSS that isn't appropriate for other (or some other) variations (or the base theme) to contain.

An example of this might be a "System controlled Dark Mode color scheme" variation where additional CSS is needed or variations that need CSS to achieve design targets.

What is your proposed solution?

When a style variation is activated for a theme a specific class (for instance theme-variation-VARIATION_NAME or something) is appended.

This would allow selectors to be crafted in style.css that would target only certain variations.

[carolinan]

Hi, can I close this as a duplicate of #43405 ?

[pbking]

Oh thank you @carolinan yes this is a dupe, thank you for pointing out #43405