experimentalDecorators in Visual Studio

[jamiewinder]

Hi. Great to see TS 1.5 finally released! Quick question which doesn't seem to be covered by the announcement / blog posts:

I see decorators have been hidden behind a compiler flag (experimentalDecorators). How can I specify this for a Visual Studio project? Guessing the answer is a tsconfig.json file, but after dropping one into the root of my project it still doesn't appear to pick it up:

{
    "compilerOptions": {
        "target": "ES5",
        "module": "system",
        "experimentalDecorators": true
    }
}

[mhegazy]

If you have a project file, tsconfig will not be honored. the project file takes precedence. We are still flushing the integration story between a VS project and a tsconfig as you can specify compiler options in both.

so to disable the error message, right-click on project file, unload project, then right-click edit the project file, At the end of the file there should be a config section, add:

  <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
     ....
    <TypeScriptExperimentalDecorators>true</TypeScriptExperimentalDecorators
  </PropertyGroup>

save and reload.

You may also need TypeScriptEmitDecoratorMetadata to map --emitDecroatorMetadata

For the full list, see Setting Compiler Options in MSBuild page.

[Elephant-Vessel]

Where is the above mentioned integration story tracked?

[mhegazy]

supporting tsconfig as the main source of configuration should be in TS1.8 and is tracked by #5287