Randomize setInterval ( How to rewrite same random after random interval)

Question

I\'d like to know how to achieve: generate a random number after a random number of time. And reuse it.

function doSomething(){
     // ... do something.....         


        

Answer 1

Here's a reusable version that can be cleared. Open-sourced as an NPM package with IntelliSense enabled.

Utility Function

const setRandomInterval = (intervalFunction, minDelay, maxDelay) => {
  let timeout;

  const runInterval = () => {
    const timeoutFunction = () => {
      intervalFunction();
      runInterval();
    };

    const delay = Math.floor(Math.random() * (maxDelay - minDelay + 1)) + minDelay;

    timeout = setTimeout(timeoutFunction, delay);
  };

  runInterval();

  return {
    clear() { clearTimeout(timeout) },
  };
};

Usage

const interval = setRandomInterval(() => console.log('Hello World!'), 1000, 5000);

// // Clear when needed.
// interval.clear();