rAF-based random interval

randomInterval.js

const randomInterval = (() => {
  const random = (min, max) => Math.random() * (max - min) + min;
  return (callback, min, max) => {
    const time = {
      start: performance.now(),
      total: random(min, max)
    };
    const tick = now => {
      if (time.total <= now - time.start) {
        time.start = now;                                                                                     
        time.total = random(min, max);
        callback();
      }   
      requestAnimationFrame(tick);
    };  
    requestAnimationFrame(tick);
  };  
})();

randomInterval(() => console.log("hi"), 1000, 2000); // logs "hi" at a random interval between 1 and 2s

→ Example usage