Node.js v21.7.1 documentation

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About this documentation#

Welcome to the official API reference documentation for Node.js!

Node.js is a JavaScript runtime built on the V8 JavaScript engine.

Contributing

Report errors in this documentation in the issue tracker. See the contributing guide for directions on how to submit pull requests.

Stability index

Throughout the documentation are indications of a section's stability. Some APIs are so proven and so relied upon that they are unlikely to ever change at all. Others are brand new and experimental, or known to be hazardous.