How to get interval or timeout by ID

Question

I want to get the data of an interval or a timeout through its ID. Just like document.getElementById('id-of-random-element') will get all the data on that specific element, I want to know if there is any way possible to get the data that was originally set for a timeout or an interval by its ID.

For example:

var a = setInterval(()=>{console.log("abcdef");},1000)
//below is some serious pseudo code
getIntervalById(a) //returns something like (()=>{console.log("abcdef");},1000)

Answer 1

One thing you might consider is to overload timers so you can intercept them and store whatever you might want

Simple example with setTimeout

const origTime = window.setTimeout;

setTimeout = function(...args) {
  const id = origTime(...args);
  // do something with arguments and id
  console.log('id:', id, 'delay:', args[1]);
  return id
}

let id = setTimeout(() => console.log('wtf'), 1000);
setTimeout(() => console.log('foobar'), 2000)

console.log('external id', id)