There's very little done for code analyze in JS, I can't even find an editor that gives me function parameter hints And show me a list of functions.
I have even considered making my own editor.
Coding without such tools force me to write code that is easy to manage and review though.
Both Visual Studio (from Microsoft) and WebStorm (from JetBrains) give you JS intellisense. Granted, JS intellesense is never going to give you as much information as a statically typed language, but Typescript helps the editor as does comment type-hinting in VS (using something along the lines of JSDoc)
You can annotate types within JSDoc, which can help somewhat. But granted, compared to statically typed languages it's still a clusterfuck. Currently writing documentation comment translation for a C#→Java/JS compiler and I'm injecting as much type-system metadata as I can, but IDE and editors still disagree to what extent they're actually using that.
There's very little done for code analyze in JS, I can't even find an editor that gives me function parameter hints And show me a list of functions. I have even considered making my own editor.
Coding without such tools force me to write code that is easy to manage and review though.