allowEvery.js

const allowEvery = (f, delay = 300) => {
  let timeOut = null;
  let lastCall = null;
  return (...args) => {
    const n = Date.now();
    if (lastCall === null) {
      lastCall = n;
    } else if (n - lastCall > delay) {
      lastCall = n;
      f(...args);
      return;
    }
    
    if (timeOut) clearTimeout(timeOut);
    timeOut = setTimeout(() => {
      timeOut = null;
      lastCall = Date.now();
      f(...args);
    }, delay - (n - lastCall)); // .unref();
  };
};