TypeScript: increment numbers with generator function

increment-numbers-with-generator.ts

// based on MDN's generator example
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*

function* incNumbers(): Generator<number, never, number> {
  let index = 0;
  while (true) {
    yield index++;
  }
}

const gen = incNumbers()

gen.next().value // 0
gen.next().value // 1
gen.next().value // 2