I really love VS Code but I miss one feature from WebStorm:

Code Inspection

The inspections detect not only compiling errors, but also different code inefficiencies. Whenever you have some unreachable code, unused code, non-localized string, unresolved method, memory leaks or even spelling problems – you'll find it very quickly.

Do you have any ideas how I can detect unreachable code, unused code or unresolved methods in VS Code?

Basically, I just know using TSLint or ESLInt using their unused variable rule but this is by far not as powerful. For example, they do not track unused methods.