Whirlwinds

Micro library for timed functions based on the amazing work done by bjoerge with repeat a lustrum ago.

Warning

This is a work in progress. The API is likely to be changed.

Installation

npm install whirlwinds

Usage

Sleep

const { sleep } = require('whirlwinds')

async function doSomething(){

  console.log('I need to wait 3000ms..')

  await sleep(3000)

  console.log('3000ms have passed!!')

}

Repeat

Basic example:

const { repeat } = require('whirlwinds')

const target = ()=> console.log('printing indefinitely')

repeat(target)
.every(200)
.go()

You can pre define a maximun time by which the repeat target function is going to get executed:

const { repeat } = require('whirlwinds')

const target = ()=> console.log('printing every 200 ms until 10000 miliseconds!')

// => synchronous way:
await repeat(target).every(200).until(10000).go()

// => no longer repeating.


// => asynchronous way:

repeat(target)
  .every(200)
  .until(10000)
  .go()
  .then(()=>{
      // => no longer repeating.
  })

Or perhaps you want to keep executing this function only when certain criteria is met:

const { repeat } = require('whirlwinds')

const target = ()=> console.log('printing every 200 ms until 10000 miliseconds!')

repeat(target)
.every(200)
.while(()=> true) // => returning true
.go()

If things get serious, Whirlwinds allows you to pause and resume the execution of the target function whenever you feel is more convenient:

const { repeat } = require('whirlwinds')

const { pause, resume, stop } = repeat(()=>{
  console.log('printing indefinitely')
})
.every(200)
.go()

// pausing...
pause()

// ... 

// resuming...
resume()

Licence

M.I.T.