# JavaScript Runtime

An environment combining a JavaScript engine with APIs such as timers, files, or browser features.

## What is **JavaScript Runtime** in JavaScript?

**JavaScript Runtime** — An environment combining a JavaScript engine with APIs such as timers, files, or browser features.

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

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/javascript-runtime