WebStorm, An async function or method in ES5/ES3 requires the 'Promise' constructor

Question

I try to write tests in typescript (ES6) using WebStorm IDE. E.g.:

// Imports...

describe(\'Message\', () => {
    const server = express();
    serv         


        

Answer 1

Add "lib": [ "es2015" ] in tsconfig.json under compilerOptions as

{
    "compilerOptions": {
      "lib": [ "es2015" ]
  }
}