ES6 Throttle

throttle.es6.js

function throttle(fn, threshhold = 250, scope, args = []) {
  let last, deferTimer;
  return function() {
    const context = scope || this;
    const now = +new Date();
    const eventArgs = arguments;

    if (last && now < last + threshhold) {
      // hold on to it
      clearTimeout(deferTimer);
      deferTimer = setTimeout(function() {
        last = now;
        fn.apply(context, [...eventArgs, ...args]);
      }, threshhold);
    } else {
      last = now;
      fn.apply(context, [...eventArgs, ...args]);
    }
  };
}