setTimeout(), setInterval(), and requestAnimationFrame()

setTimeout(() => {
  // Code A
}, 0);

Promise.resolve().then(() => {
  // Code B
});

// Code C

A, B, C
C, A, B
C, B, A
The execution order follows event loop priorities: 1) Synchronous code executes first (C), 2) Microtasks (Promise) execute next (B), 3) Macrotasks (setTimeout) execute last (A), 4) setTimeout(0) still has minimum delay, 5) Promise resolution is handled in microtask queue, 6) Important for understanding async code flow.
B, C, A