[pszndr]

If the issue is IDEs you can do all that with WebStorm.

As a matter of fact, you can even use IntelliJ for checking function usages and refactoring in JavaScript.

[maeln]

Even the best IDE cannot do anything about the fact that JS is dynamically typed.

Yes, modern IDE do wonderful thing to help you with JS but they will never be able to match the help they can give with a language that is statically typed.