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

Solution without editing the project sources

I had this problem with IntelliJ and resolved by changing my IDE settings:

Settings -> Language & Frameworks -> TypeScript

then in the "Options" field add:

--lib es2015