Create Exposed Promise

createExposedPromise.ts

const createExposedPromise = <T>() => {
	let resolve: (value: T | PromiseLike<T>) => void
	let reject: (reason: any) => void

	const promise = new Promise<T>((res, rej) => {
		resolve = res
		reject = rej
	})

	return {
		resolve,
		reject,
		promise,
	}
}

const {promise, resolve} = createExposedPromise<string>()

promise.then(res => console.log('resolved:', res))

resolve('Hello World!')