asyncnize

asyncnize.js

Function.prototype.async = function(pos){
	return (...args) =>
		new Promise((resolve, reject) => {
			var iidx = Object.is(-0, pos) ? args.length : pos
			var cb = (...cbarr) => resolve(cbarr)
			args.splice(iidx, 0, cb)
			this(...args)
		})
}

Function.prototype.lasync = function(...args){
	return this.async(0)(...args)
}

Function.prototype.rasync = function(...args){
	return this.async(-0)(...args)
}

asyncnize.usage.js

!async function(){
	console.log(new Date())
	await setTimeout.async(0)(2000)
	console.log(new Date())
}()


function wait(msec, cb){
	setTimeout(cb, msec)
}

wait(2000, () => console.log(1))

!async function(){
	console.log(new Date())
	await wait.async(-0)(2000)
	console.log(new Date())
}()


!async function(){
	console.log(new Date())
	await setTimeout.lasync(2000)
	console.log(new Date())
}()

!async function(){
	console.log(new Date())
	await wait.rasync(2000)
	console.log(new Date())
}()