Promise.js

const a = item => new Promise(resolve => setTimeout(() => resolve(item), 10))
const b = item => new Promise(resolve => setTimeout(() => resolve(item), 100))
const c = item => new Promise(resolve => setTimeout(() => resolve(item), 200))

// Parallel
const parallel = async () => {
	const processes = [a(), b(), c()]
	const [output1, output2, output3] = await Promise.all(processes)
	
	return `parallel is done: ${output1} ${output2} ${output3}`
}

// Race
const race = async () => {
	const processes = [a(), b(), c()]
	const output = await Promise.race(processes)
	
	return `Race is done: ${output}`
}

// Sequence
const race = async () => {
	const output1 = await a()
	const output2 = await b()
	const output3 = await c()
	
	return `Sequence is done: ${output1} ${output2} ${output3}`
}