debounce.js

function Debounce(fn, ms) {
  this.timeout = null;
  this.fn = fn;
  this.ms = ms;
}
Debounce.prototype.start = function () {
  this.timeout = setTimeout(this.fn, this.ms);
};
Debounce.prototype.reset = function () {
  this.abort();
  this.start();
};
Debounce.prototype.abort = function () {
  clearTimeout(this.timeout);
};

var debouncedScroll = new Debounce(function () {
  // do stuff
}, 200);
window.addEventListener('scroll', debouncedScroll.reset);