Example for a task queue in node.js using library called `modern-async`. Error handling considered. API looks better than `fastq`

modern-async-queue-example.js

const { Queue, sleep } = require("modern-async");

const queue = new Queue(3); // create a queue with concurrency 3

async function main() {
  const array = Array.from(Array(30).keys()); // an array of 100 numbers from 0 to 99

  const promises = [];
  for (const i of array) {
    promises.push(
      queue.exec(async () => {
        console.log(`Starting task ${i}`);
        await sleep(Math.random() * 10); // waits a random amount of time between 0ms and 10ms
        if (i === 5) throw Error("something not right");
        console.log(`Ending task ${i}`);
        return i;
      })
    );
  }

  try {
    const results = await Promise.all(promises);
    console.log(results); // will display an array with the result of the execution of each separate task
  } catch (error) {
    console.warn("Error occurred", error.message);
    console.warn("----------------------------------");
  }
  // all the scheduled tasks will perform with a maximum concurrency of 3 and log when they start and stop
}

main();