Execute an array of functions with a delay between each execution

queue.js

const queue = (query, delay, next) => {

	if (query.length===0) return next()

	query[0]()

	const trimmed = query.slice(1)

	setTimeout(() => exec(trimmed, delay, next), delay)

}

Example:

queue([
  () => console.log('0'),
  () => console.log('1'),
  () => console.log('2')
], 500, () => console.log('done'))