debounce

debounce.js

var debounce = function(fn, interval) {
  var lock  = false;
  var id;

  return function debouncedFn() {
    var args = arguments;

    var invoke = function() { 
      lock = false;
      fn.apply(null, args);
    }

    // Reset invocation if called within interval
    if (lock) {
      clearTimeout(id);
      id = setTimeout(invoke, interval);
      return;
    }

    // Lock and apply function
    id = setTimeout(invoke, interval);
    lock = true;
  }
}

var debouncedPrint = debounce(console.log.bind(console), 2000);

debouncedPrint('poop');