experimentalDecorators Typescript warning always present

[dbaeumer]

From @giacomorebonato on June 23, 2016 18:53

• VSCode Version: 1.3.0-insider
• OS Version: El Capitan

Steps to Reproduce:

1. Create a Typescript project
2. Use decorators (I am using Mobx)

I keep seeing the warning:

[ts] Experimental suport for decorators is a feature that is subject to chang in a future release. Set the 'experimentalDecoratos' option to remove this warning.

Where should I set this option? Because my tsconfig.json should be right

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "declaration": false,
    "noImplicitAny": false,
    "removeComments": false,
    "isolatedModules": false,
    "jsx": "react",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "noLib": false,
    "preserveConstEnums": true,
    "suppressImplicitAnyIndexErrors": true,
    "outDir": "./dist/"
  },
  "exclude": [
    "client",
    "node_modules",
    "typings/browser",
    "typings/browser.d.ts"
  ]
}

Copied from original issue: microsoft/vscode#8069

[mhegazy]

I could not get this to reproduce on a simple project. can you share more context.

[giacomorebonato]

This is the repo that I am using.

[mhegazy]

What version of TS are you using? are you using the nightly build (https://github.com/Microsoft/TypeScript-Handbook/blob/master/pages/Nightly%20Builds.md#visual-studio-code) ?

[DanielRosenwasser]

I think this is potentially a duplicate of #8905.

[giacomorebonato]

I am using "typescript": "^1.8.10" . Should I use a dev one?

[mhegazy]

looks like a duplicate of #8905 then. can you give the nightly a try and see if it resolves the issue for you? here are the instructions: https://github.com/Microsoft/TypeScript-Handbook/blob/master/pages/Nightly%20Builds.md#visual-studio-code.

[giacomorebonato]

Problem still present with
"typescript": "^2.0.0-dev.20160628"
"tslint": "^3.12.0-dev.2"

[DanielRosenwasser]

@giacomorebonato are you running El Capitan with case-sensitivity on your drive? @laurelnaiad was running into this over Gitter.

[laurelnaiad]

My details:

• case sensitive HFS+ on El Capitan
• node 5.12.0
• typescript Version 2.0.0-dev.20160705
• VSCode version 1.2.1

Peculiarities:

• experimentalDecorators warnings
• paths that should be resolvable based on baseUrl setting of "." are not properly resolved

I cannot say when either of these issues might have developed, since I've been using atom-typescript throughout -- every time I've tried to use VSCode I've not been able to get it to work, though I don't know if the same issue has been the reason each time.

[giacomorebonato]

Sorry for all the mess.. I don't know why I was excluding all client code in tsconfig... Everything works know.
Thanks for the support.

[mhegazy]

@laurelnaiad looks like your tsconfig.json has errors or the file you are working on is not included in this tsconfig.json (either excluded or not in the folder).

[mhegazy]

thanks @giacomorebonato for getting back to us on this. closing.