Closure in setInterval — solution with ref pattern

What does this output?

// Stale closure: setInterval always reads count=0
let count = 0;
let staleLog = [];

const id1 = (() => {
  const capturedCount = count; // captured at setup
  let ticks = 0;
  return setInterval(() => {
    staleLog.push(capturedCount); // always 0
    if (++ticks === 3) clearInterval(id1);
  }, 0);
})();

// Ref solution: interval reads from a mutable object
const ref = { current: 0 };
let freshLog = [];
let ticks2 = 0;
const id2 = setInterval(() => {
  freshLog.push(ref.current); // always latest
  if (++ticks2 === 3) clearInterval(id2);
}, 0);
ref.current = 5;
ref.current = 10;

setTimeout(() => {
  console.log(staleLog.join(','));
  console.log(freshLog.join(','));
}, 50);

Correct Output

0,0,0
10,10,10

Why this output?