Whats the purpose of typescript's __awaiter

Question

consider this simple class

class Test {
    private foo(): Promise {
        return new Promise((resolve, reject) => {
            res         


        

Answer 1

Typescript includes the __awaiter helper because async/await is not a part of the es6/es2015 specification.

Initial definition in ES2017. -- MDN

If you don't want to include this helper, you need to target es2017.