What is the difference between setTimeout(), setImmediate(), and process.nextTick()?

setTimeout() schedules a callback to run after a minimum delay. setImmediate() schedules a callback to run after the current event loop completes. process.nextTick() schedules a callback to run before the next event loop iteration begins.

setTimeout(() => console.log("setTimeout"), 0);
setImmediate(() => console.log("setImmediate"));
process.nextTick(() => console.log("nextTick"));

In this example, process.nextTick() will execute first, followed by either setTimeout() or setImmediate() depending on the environment.