Javascript ES Module - sleep.js

sleep.js

/**
 * Sleep, delay, pause or wait in Javascript
 * @link https://www.sitepoint.com/delay-sleep-pause-wait/
 * @param {Number} timeout Number in miliseconds
 * @return {Promise}
 */
export const sleep = timeout => new Promise(resolve => setTimeout(resolve, timeout))

sleep.spec.js

import { describe, it, expect } from 'vitest'
import { sleep } from './sleep'

describe('sleep', () => {
  it('should wait for specified time', async () => {
    const duration = 1000
    const startTime = Date.now()
    await sleep(1000)
    const endTime = Date.now()

    expect(endTime - startTime).toBeGreaterThanOrEqual(duration)
  })
})