Function invoke

lib/helpers/throttle.js:13–21

(args, now = Date.now())

  let timer;

  const invoke = (args, now = Date.now()) => {
    timestamp = now;
    lastArgs = null;
    if (timer) {
      clearTimeout(timer);
      timer = null;
    }
    fn(...args);
  };

  const throttled = (...args) => {
    const now = Date.now();