function* operation() { //@ts-expect-error `string` is not assignable to `number...

chalsprhebaodu 5 months ago | parent | context | favorite | on: Effection 3.0 – Structured concurrency and effects...

    function* operation() {
      //@ts-expect-error `string` is not assignable to `number`!
      let count = yield* createString();
      return count.toExponential()
    }

Is this a typo? How does the compiler know that count should be a number?