rala v1.0.1

What's this?

Converts functions which has callback function like setTimeout to awaitable function.

• If callback function is located in the first, you can use la.
• If callback function is located in the last, you can use ra.

Examples

Simple case

const rala = require("rala")

!async function(){
	await rala.la(setTimeout, 2000)
	
	console.log("This message will be shown after 2 sec after.")
}()

Install

install function extends built-in functions and prototypes.

• Promise.left
• Promise.right
• Function.prototype.la
• Function.prototype.ra

require("rala").install()

function sleepL(callback, time){
	const start = Date.now()
	setTimeout(_ => {
		callback(Date.now() - start)
	}, time)
}

function sleepR(time, callback){
	const start = Date.now()
	setTimeout(_ => {
		callback(Date.now() - start)
	}, time)
}

!async function(){
	console.time("1000ms")
	const actual_wait1 = await sleepL.la(1000)
	console.timeEnd("1000ms")
	console.log(actual_wait1)

	console.time("2000ms")
	const actual_wait2 = await sleepR.ra(2000)
	console.timeEnd("2000ms")
	console.log(actual_wait2)

	console.time("foo")
	const value = await Promise.left(setTimeout)(1000, "foo")
	console.timeEnd("foo")
	console.log(value)
}()

// 1000ms: 1.00e+3ms
// 1001
// 2000ms: 2.00e+3ms
// 2002
// foo: 1.00e+3ms
// foo

Chrome Extensions

Almost functions of chrome extensions has callback function at last.

!async function(){
	const tabs = await chrome.tabs.query.ra({})
	console.log(tab)
}()

Then

Of course you can also use then method.

setTimeout.la(2000).then(_ => console.log("2 seconds passed."))