[derimagia]

Javascript is a tricky language to do this, most libraries don't have types or JSDocs which is somewhat an issue so they need to be way less strict on what's auto-completed/interpreted. I don't see this as a fault in Jetbrains here. I say that wishing it would do more, but understanding it's probably at it's limits.

Try IntelliJ with plugins for Ruby, Python, PHP, NodeJS, Go, Rust - I agree that for the most part it just "works". Although you can "feel" it's Java engine sometimes.