Hacker News new | ask | show | jobs
by onion2k 1298 days ago
Variables would be the obvious answer here.

Variables are very cool and super powerful, but they fall down if you need to support old browsers and it's really easy to make things that are hard to reason about (defined in several places, used in calc()s, overridden in the cascade, etc). On a team that doesn't communicate or test well vars can be a source of pain.