Definitelytyped: tsc compilation error

[jugmabora]

• [x] I tried using the @types/chai package (4.2.3) and had problems.
  
  
  
  • Authors: @
    
    Jed Mao https://github.com/jedmao,
    
    Bart van der Schoor https://github.com/Bartvds,
    
    Andrew Brown https://github.com/AGBrown,
    
    Olivier Chevet https://github.com/olivr70,
    
    Matt Wistrand https://github.com/mwistrand,
    
    Josh Goldberg https://github.com/joshuakgoldberg
    
    Shaun Luttin https://github.com/shaunluttin
    
    Gintautas Miselis https://github.com/Naktibalda
    
    Satana Charuwichitratana https://github.com/micksatana
    
    Erik Schierboom https://github.com/ErikSchierboom
    
    Rebecca Turner https://github.com/9999years
  
  

Below are the errors I get using tsc version 3.6.3

node_modules/@types/chai/index.d.ts:121:9 - error TS8020: JSDoc types can only be used inside documentation comments.

121 any?, // actual value
~~~~

node_modules/@types/chai/index.d.ts:122:9 - error TS8020: JSDoc types can only be used inside documentation comments.

122 boolean? // showDiff
~~~~

node_modules/@types/chai/index.d.ts:126:16 - error TS2370: A rest parameter must be of an array type.

126 assert(...args: AssertionArgs): void;

[JoshuaDietz]

Same for me

[JoshuaDietz]

Okay I found the error for me, maybe it helps someone else:
The Typescript feature used in these lines (optional elements in tuple types) is pretty new and so old Typescript versions don't know it. So I removed ts-node and typescript from my package.json and reinstalled the newest version, now the error is gone
New entries in package.json:
"ts-node": "^8.4.1", "typescript": "^3.6.3"

So @jugmabora maybe you should check if you are really using the Typescript version you mentioned above or if there is an old version hanging around

In addition I had a problem with two missing types, the fix for that was to change the Typescript target to "es2015"

[facelinker]

Same for me

[mhamiltonsmith]

I also had this problem. I resolved it by updating typescript globally.
sudo npm install -g typescript@latest
https://stackoverflow.com/questions/39677437/how-to-update-typescript-to-latest-version-with-npm