debounce with queue

debounceWithQueue.js

let debounceWithQueue = function(fn, wait = 0) {
  let timeoutId;
  let argsQueue = [];

  return function(arg) {
    argsQueue = argsQueue.concat(arg);

    if (timeoutId !== undefined) {
      clearTimeout(timeoutId);
    }

    timeoutId = setTimeout(function() {
      fn(argsQueue);
      timeoutId = undefined;
      argsQueue = [];
    }, wait);
  };
};


let onMsg = debounceWithQueue(function(args) {
  console.log(args);
}, 100);

let flushMsg = function() {
  let i = 100;
  while (i) {
    onMsg(i);
    i-=1;
  }
};

flushMsg();  // [100, 99, 98, ...1]