simple sequential queue
npm install --save sequential-queuesequential queue is empty;
import SequentialQueue from 'sequential-queue';
const queue = new SequentialQueue();
queue.on(SequentialQueue.Event.Done, () => {
// done: empty queue;
});
const somethingAsyncFunction = () => new Promise(resolve => setTimeout(resolve, 1000));
//push returns promise input arguments resolved
const result = queue
.push(somethingAsyncFunction())
.then(() => 'done!');
console.log(result);
// done!MIT