tsconfig.json "experimentalDecorators" was ignored in subfolder

[nodejayes]

• VSCode Version: 1.21.0
• OS Version: Ubuntu Mate 17.10 x64
• the tsc can successfully compile the project
• i try the vscode(2.7.2) typescript version and the version installed by npm(2.7.1, 2.7.0, 2.0.0)

Steps to Reproduce:

1. create a new directory
2. install typescript 2.7.2
3. create a tsconfig.json in this directory with this content to enable experimental Decorators

{
    "compilerOptions": {
        "experimentalDecorators": true,
        "allowJs": true
    }
}

4. create an index. ts file with this content in the directory

function testdec(constructor: Function) {

}

@testdec
class Test {

}

5. create a subdirectory and move the index. ts file to this directory

---

What happens if the type script file is located in the directory where the tsconfig. json is located, no warning will be displayed if not then a warning will be displayed, as if the settings of tsconfig. json are ignored.

[mjbvz]

I can't repo this in a simple project. In src/index.ts, what happens if you run TypeScript: Go to project configuration?

[nodejayes]

@mjbvz i get the message "The file is not part of a type script project"

If I move the tsconfig. json into the src folder, the warning disappears and I move the tsconfig. json into root folder the warning comes out again.

That may not matter, but
I can reproduce the same error on a Windows 10 computer in our Company.

[mjbvz]

Two more things to try:

1. Add an exclude section to your jsconfig.json:

{
    "compilerOptions": {
        "allowJs": true,
        "experimentalDecorators": true
    },
    "exclude": [
        "node_modules",
        "**/node_modules/*"
    ]
}

2. Try using typescript@next by following these instructions: https://code.visualstudio.com/docs/languages/typescript#_using-newer-typescript-versions This issue you reported sounds similar to Bug: intellisense does not see new files. TypeScript#20023

[nodejayes]

I tried these two things but unfortunately without success.

I'm beginning to think it must be typescript, because I can reproduce the same error in the Atom Editor.

My used Typescript version is now 2.8.0-dev.20180318

[nodejayes]

Ok this is not an Error its my Fault.

When i add the src Folder to the include it works.

{
    "compilerOptions": {
        "allowJs": true,
        "experimentalDecorators": true
    },
    "include": [
        "src/**/*"
    ]
}

Thanks for your time.