VSCode: Is it possible to suppress experimental decorator warnings

VSC is by default looking at its own TS library and definition. If you're using a different version (which is very likely) you should point VSC to look for that versions definition.

In my settings.json file, i have the following set up:

// Place your settings in this file to overwrite default and user settings.
{
    "typescript.tsdk": "node_modules\\typescript\\lib"

}

I believe you can set this for either your User Settings or your Workspace Settings. So you can do a one time configuration in your User Settings or just for one project/workspace. This works if you have your typescript installed locally in the specified folder - which i believe is the default nodes module folder.

To edit your settings go to File/Preferences/User Setting or File/Preference/Workspace Settings.

UPDATE: Visual Studio Code just released a new version with better support for different versions of typescript. Check it out here: https://code.visualstudio.com/updates#_languages

I was having this same error. I added the following tsconfig.json file to my project root, restarted VSCode and it finally went away:

{
    "compilerOptions": {
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "module": "amd",
        "target": "ES6" 
    }
}

UPDATE:

I've noticed that sometimes VS Code will not suppress this warning until you add a "files" array in your tsconfig.json, even an empty one will work. For me this has worked every single time now, if the message does not disappear, try the following:

{
    "compilerOptions": {
        ... 
    },
    "files": [],
    "exclude": [
        "node_modules"
    ]
}

Perhaps this will explain why everyone has mixed results?

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

"javascript.implicitProjectConfig.experimentalDecorators": true

VSCode -> Preferences -> Settings