Selector based filtering?

[merrywhether]

The transform function currently allows you to make optimizations on specific properties, but it would also be really helpful to be able to drop rules based on selectors in situations where you can't easily shape parts of the css that you're including in your app like including libraries, common-style-repos, etc. I'm not sure if this could be fit into the current transform callback as a third argument.

An example of this would be having a lot of selectors like .theme-light .button and .theme-light .card, and it'd be great to be able to test selectors and drop all selectors that include .theme-light in some way, leading to possible selector-less rule blocks that could then be omitted entirely from the resulting output.

[jakubpawlowicz]

Sure, we can have it. 👍

[jakubpawlowicz]

Fixed in master & due in 4.2.0.

[merrywhether]

Awesome! Looking forward to it.