JavaScript delayed promise

delay-promise.js

// Sometimes it is helpful/necessary to create a promise, that delays the execution.
// This snippet returns a promise, that is resolved after a given timeout.
// The `min` and `max` arguments are used to calcuate a random delay in the range between `min` and `max`
let delay = (min, max) => {
	return new Promise(resolve => {
		setTimeout(resolve, Math.random() * (max - min) + min)
	})
}

// In your actual code you use it as follows:
delay(200, 1000).then(() => {
	// your delayed code here
})

// I use the above for delaying mocked requests with the `fetch-mock` library.
fetchMock.mock('begin:/my/dummy/url', (url, options) => {
	return delay(200, 1000).then(() => {
		// my code creating the response object where I look at the options for post parameters
		return responseObject
	})
})