delaying the execution of your function until ready be called

queue-function.js

const _ = require('lodash');

module.exports = queue;

function queue(fn) {
  var queuedArgs = [];
  var ready = false;

  queuedFn.ready = function() { 
    ready = true;
    queuedArgs.forEach((arg) => fn.apply(fn, arg));
  };
  
  return queuedFn;

  function queuedFn() {
    if (ready)
      return fn.apply(fn, arguments);
    
    queuedArgs.push(arguments);
  }
}

var testerQueue = queue(tester)

function tester(x,y) {
  console.log(x,y);
}

setTimeout(function() {
  testerQueue.ready();
}, 3000);


testerQueue(1,2);
testerQueue(3,4);
testerQueue(5,6);