I recently migrated from Sass to Stylus, and I'm loving it.
However, there is 1 thing that really made sense in Sass that doesn't exist in stylus. The compiler should yell at me if a variable is undefined, instead of just spitting it out as a string like nothing ever happened.
Is there a way to make the compiler yell at me ?
Assuming all options are in this page, you cannot do what you want at the moment.
You can still add this feature yourself or request it (by creating an issue) on the official github repo
By the way, this would be a good feature.