asyncForever.js

const async = require('async');

function run(cb) {
  // do some fun stuff
  cb();
}

async.forever(
  (next) => {
    run((err, res) => {
      next();
    });
  },
  (err) => {
    // There was an error that wasn't caught in run, oh no!
    throw err;
  },
);