Timers

setTimeout, setInterval, setImmediate, their clear* counterparts, and queueMicrotask are globals.

Differences from browsers

• Timers return Node Timeout or Immediate objects, not numbers, with ref(), unref(), hasRef(), and refresh() (Timeout only).
• String handlers are not supported; the callback must be callable.
• At a checkpoint, callbacks run in this order:
  1. process.nextTick
  2. Promise and queueMicrotask callbacks, in enqueue order
  3. setImmediate
  4. Zero-delay timers