Provide completion inside/from Promise.then

Support parenthesized expressions

Resolve functions in other files even when IDEA does not manage

Infer type of variable assigned few lines after declaration (For cases when in "if" it is assigned one value, but in "else" another)

Support ternary operator

Add resolved expression caching (Irreplacable when you resolve a recursive function)

Infer return type of Object.assign from passed args

Provide completion inside/from Promise.then

Provide completion on any class instance, not just Array instances