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About this Documentation
The goal of this documentation is to comprehensively explain the Node.js API, both from a reference as well as a conceptual point of view. Each section describes a built-in module or high-level concept.
Where appropriate, property types, method arguments, and the arguments provided to event handlers are detailed in a list underneath the topic heading.
Every .html document has a corresponding .json document presenting
the same information in a structured manner. This feature is
experimental, and added for the benefit of IDEs and other utilities that
wish to do programmatic things with the documentation.
Every .html and .json file is generated based on the corresponding
.markdown file in the doc/api/ folder in node's source tree. The
documentation is generated using the tools/doc/generate.js program.
The HTML template is located at doc/template.html.
Stability Index
Throughout the documentation, you will see indications of a section's stability. The Node.js API is still somewhat changing, and as it matures, certain parts are more reliable than others. Some 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 and in the process of being redesigned.
The stability indices are as follows:
Stability: 0 - Deprecated
This feature is known to be problematic, and changes are
planned. Do not rely on it. Use of the feature may cause warnings. Backwards
compatibility should not be expected.
Stability: 1 - Experimental
This feature was introduced recently, and may change
or be removed in future versions. Please try it out and provide feedback.
If it addresses a use-case that is important to you, tell the node core team.
Stability: 2 - Unstable
The API is in the process of settling, but has not yet had
sufficient real-world testing to be considered stable. Backwards-compatibility
will be maintained if reasonable.
Stability: 3 - Stable
The API has proven satisfactory, but cleanup in the underlying
code may cause minor changes. Backwards-compatibility is guaranteed.
Stability: 4 - API Frozen
This API has been tested extensively in production and is
unlikely to ever have to change.
Stability: 5 - Locked
Unless serious bugs are found, this code will not ever
change. Please do not suggest changes in this area; they will be refused.
JSON Output
Stability: 1 - Experimental
Every HTML file in the markdown has a corresponding JSON file with the same data.
This feature is new as of node v0.6.12. It is experimental.