ecmascript 6 - ES6 / ES7 support in Visual Studio 2015 Community

Question

I'm hearing that VS 2015 is supporting the new js syntax but when I open up a project written using aurelia.js in this IDE intellisense complains about many, many things eg.

export class UpperValueConverter {
  toView(value){
    return value && value.toUpperCase();
  }
}

I have the WebEssentials 2015 installed. Still nothing seems to work... Probably an important information is that my current VS installation is a fresh one, so I didn't mess up any settings.

Answer 1

Javascript is a language. ES6 is a version of Javascript. Microsoft has not supplied a intellisense mapping file for it. The suggestions on this post suggest using javascript frameworks/APIs which do provide intellisense mapping files. These suggestions do not answer the question on how to stop getting intellisense errors for new Javascript versions. Unless someone creates that mapping file and provides a URL for us to reference from Visual Studio/tools/Javascript/Intellisence/references you will get syntax errors writing straight ES6 Javascript.