Exercise: Asynchronous JavaScript

The preceding demo showed the timer cue after the immediate cue. Build a separate broadcast sequence. setTimeout(callback, 0) schedules work; it cannot interrupt the current script. Return a Promise so callers can wait for the timer: new Promise(resolve => { ...; resolve(value); }) creates a value that completes when resolve is called. The next demo unpacks Promises and await further. This script-only offline preview captures delayed Console logs without a DOM task or network.

Worked example

A separate event schedule demonstrates why immediate code finishes before a timer:

const cues = ["Open"];
setTimeout(() => {
  cues.push("Bell");
  console.log(cues.join(" → ")); // Open → Close → Bell
}, 0);
cues.push("Close");