# Microtask Queue

A high-priority queue used by Promise reactions and queueMicrotask callbacks.

## What is **Microtask Queue** in JavaScript?

**Microtask Queue** — A high-priority queue used by Promise reactions and queueMicrotask callbacks.

```javascript
queueMicrotask(() => {
    updateStatus("Ready");
});
```

Level: Master · [More JavaScript terms at this level](https://www.ask-codey.com/glossary/subjects/javascript/master)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/microtask-queue