Tukukkk

I've to add the following in the settings.json file of vscode to remove the warning.

"javascript.implicitProjectConfig.experimentalDecorators": true

VSCode -> Preferences -> Settings

This error also occurs when you choose "src" folder for your workspace folder.

When the root folder, folder where the "src", "node_modules" are located is chosen, the error disappears

have to add typescript.tsdk to my .vscode/settings.json:

"typescript.tsdk": "node_modules/typescript/lib"

inside your project create file tsconfig.json , then add this lines

{

    "compilerOptions": {

        "experimentalDecorators": true,

        "allowJs": true

    }

}

"javascript.implicitProjectConfig.experimentalDecorators": true

Will solve this problem.

Open settings.json file in the following location <project_folder>/.vscode/settings.json

or you can open the file from the menu as mentioned below

VSCode -> File -> Preferences -> Workspace Settings

Then add the following lines in settings.json file

{

    "typescript.tsdk": "node_modules/typescript/lib",

    "enable_typescript_language_service": false

}

That's all. You will see no warning/error regarding 'experimentalDecorators'

This answer is intended for people who are using a Javascript project and not a Typescript one. Instead of a tsconfig.json file you may use a jsconfig.json file.

In the particular case of having the decorators warning you wan write inside the file:

{

    "compilerOptions": {

        "experimentalDecorators": true

    }

}

Fort the buggy behaviors asked, it's always better to specify the "include" in the config file, and restart the editor. E.g.

{

    "compilerOptions": {

        "target": "ES6",

        "experimentalDecorators": true

    },

    "include": [

        "app/**/*"

    ],

    "exclude": [

        "node_modules"

    ]

}

Add following lines in tsconfig.json and restart VS Code.

{

    "compilerOptions": {

        "experimentalDecorators": true,

        "target": "es5",

        "allowJs": true

    }

}

Not to belabor the point but be sure to add the following to

• Workspace Settings not User Settings

under File >> Preferences >> Settings

"javascript.implicitProjectConfig.experimentalDecorators": true

this fixed the issue for me, and i tried quite a few suggestions i found here and other places.

For the sake of clarity and stupidity.

1) Open .vscode/settings.json.

2) Add "typescript.tsdk": "node_modules/typescript/lib" on it.

3) Save it.

4) Restart Visual Studio Code.

Please check you oppened in your VS Code the folder of the entire project and not only the src folder, because if you open only the src, then ts.config.json (located in the project folder) file will not be in scope, and VS will not recognize the experimental decorators parameters.

In my case this fixed all the problems related to this issue.

If you are working in Visual studio. You can try this fix

1. Unload your project from visual studio


2. Go to your project home directory and Open "csproj" file.


3. 
   

   Add TypeScriptExperimentalDecorators to this section as shown in image

   
   
   

   

   
   
   
   
   
   4. Reload the project in Visual studio.
   
   
   
   

see more details at this location.

I corrected the warning by removing "baseUrl": "", from the tsconfig.json file

Open entire project's folder instead of project-name/src

tsconfig.json is out of src folder

1. Open VScode.


2. Press ctrl+comma


3. Follow the directions in the screen shot
   
   
   
   
   1. Search about
      experimentalDecorators
   
   
   2. Edit it
   
   
   
   

I had this problem recently under Visual Studio 2017 - turned out it was caused by a "feature" of VS - ignoring tsconfig.json when Build action is not set to Content.

So changing the Build action to Content and reloading the solution solved the problem.

You might run into this issue if you open a TS file that exists outside of the project. For instance, I'm using lerna and had a file open from another package. Although that other package had it's own tsconfig with experimental decorators, VsCode doesn't honor it.

I faced the same issue while creating an Injectable Services in Angular 2.
I have all the things at place in tsconfig.json .Still I was getting this error at ColorsImmutable line.

@Injectable()

export class ColorsImmutable {

And fix was to register the Service at module Level or Component Level
using the providers array.

providers:[ColorsImmutable ],

I added this option to tsconfig.json, "baseUrl": "front-end" Replace front-end with the name of your angular-cli project.

If you are using cli to compile *.ts files, you can set experimentalDecorators using the following command:

 tsc filename.ts --experimentalDecorators "true"