VS 2017 RC solution analysis does not respect tsconfig.json "types" property (shows errors)

[jasonswearingen]

TypeScript Version: VS 2017 RC, Community Edition

Code
open a project that uses the tsconfig.json "types" property, such as

 "types": ["node", "mocha"],

and vs 2017 RC shows errors such as

Error	TS2307	Cannot find module 'assert'.	xlib (tsconfig project)	C:\repos\stage4\xlib\src\logging.ts	12	Active

Expected behavior:
tsc compiles the project fine. also opening the project in VS2015 with NodeJs tools works fine.

Actual behavior:
vs 2017 RC shows intellisense errors in the error list. building ctrl-shift-b works fine and no errors are shown.

Repo Steps*
download the xlib project from https://github.com/Novaleaf/xlib and open it in VS2017 RC Community Edition.

[jasonswearingen]

UPDATE

removing the following line from tsconfig.json removes the error from solution analysis

"typeRoots":[]

however that enables global inclusion of all @types which caused problems with nested projects before. I will investigate and see if the new version resolves these other issues.

[jasonswearingen]

removing typeRoots is an effective workaround.

[mhegazy]

well.. typeRoots were empty so not types were inferred. so the behavior you are seeing is correct. please see www.typescriptlang.org/docs/handbook/tsconfig-json.html#types-typeroots-and-types for more details.

[jasonswearingen]

i explicitly had the types property set, and it works using the tsc commandline compiler.

only vs 2017 built-in solution analysis chokes. but if you are fine with functional discrepancies, okay i guess.

[mhegazy]

We should look why there is a difference in behavior there. but this configuration does not look right. you are saying include "node" and "mocha" from "no where".

[jasonswearingen]

from what I understand, by default the compiler will include all d.ts files it can find. adding the typeRoots restricts this to a certain path, and adding types forces that only certain definitions will be included by default.

all definitions explicitly loaded in code are loaded normally regardless.

so my project has type definitions for node and mocha but they are never explicitly loaded anywhere in my code.

[mhegazy]

from what I understand, by default the compiler will include all d.ts files it can find

this is not accurate. all declaration files under typeRoots is what is included if types is not specified. if types is specified, only these are loaded.