2012-02-27 20:06:14 +01:00
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# About this Documentation
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2017-01-23 04:16:21 +01:00
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<!--introduced_in=v0.10.0-->
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2012-02-27 20:06:14 +01:00
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<!-- type=misc -->
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2019-05-16 05:24:21 +02:00
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Welcome to the official API reference documentation for Node.js!
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2012-02-27 20:06:14 +01:00
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2019-05-16 05:24:21 +02:00
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Node.js is a JavaScript runtime built on the [V8 JavaScript engine][].
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2012-02-27 20:06:14 +01:00
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2017-12-15 22:49:36 +01:00
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## Contributing
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2016-01-08 19:32:50 +01:00
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2019-05-21 01:18:46 +02:00
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Report errors in this documentation in [the issue tracker][]. See
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[the contributing guide][] for directions on how to submit pull requests.
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2016-01-08 19:32:50 +01:00
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2012-02-27 20:06:14 +01:00
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## Stability Index
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<!--type=misc-->
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2019-05-23 01:29:11 +02:00
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Throughout the documentation are indications of a section's stability. Some APIs
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are so proven and so relied upon that they are unlikely to ever change at all.
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Others are brand new and experimental, or known to be hazardous.
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The stability indices are as follows:
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2018-08-27 03:30:48 +02:00
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> Stability: 0 - Deprecated. The feature may emit warnings. Backward
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> compatibility is not guaranteed.
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<!-- separator -->
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2020-02-27 18:30:24 +01:00
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> Stability: 1 - Experimental. The feature is not subject to
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> [Semantic Versioning][] rules. Non-backward compatible changes or removal may
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> occur in any future release. Use of the feature is not recommended in
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> production environments.
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<!-- separator -->
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2018-08-27 03:30:48 +02:00
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> Stability: 2 - Stable. Compatibility with the npm ecosystem is a high
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> priority.
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2019-05-28 07:59:03 +02:00
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Use caution when making use of Experimental features, particularly within
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modules. End users may not be aware that experimental features are being used.
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Bugs or behavior changes may surprise end users when Experimental API
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modifications occur. To avoid surprises, use of an Experimental feature may need
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a command-line flag. Experimental features may also emit a [warning][].
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2012-03-04 00:51:14 +01:00
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## JSON Output
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<!-- YAML
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added: v0.6.12
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-->
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2012-03-04 00:51:14 +01:00
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2019-05-23 20:45:49 +02:00
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Every `.html` document has a corresponding `.json` document. This is for IDEs
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and other utilities that consume the documentation.
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2019-05-30 10:00:11 +02:00
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## System calls and man pages
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2019-05-30 10:00:11 +02:00
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Node.js functions which wrap a system call will document that. The docs link
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to the corresponding man pages which describe how the system call works.
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2019-05-30 10:00:11 +02:00
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Most Unix system calls have Windows analogues. Still, behavior differences may
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be unavoidable.
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2016-01-08 19:32:50 +01:00
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2020-02-27 18:30:24 +01:00
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[Semantic Versioning]: https://semver.org/
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2018-04-09 18:30:22 +02:00
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[the contributing guide]: https://github.com/nodejs/node/blob/master/CONTRIBUTING.md
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2019-05-21 01:18:46 +02:00
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[the issue tracker]: https://github.com/nodejs/node/issues/new
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2019-05-16 05:24:21 +02:00
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[V8 JavaScript engine]: https://v8.dev/
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2019-05-28 07:59:03 +02:00
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[warning]: process.html#process_event_warning
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