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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.js'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 is subject to change, and is gated by a command line flag.
It may change or be removed in future versions.
Stability: 2 - Stable
The API has proven satisfactory. Compatibility with the npm ecosystem
is a high priority, and will not be broken unless absolutely necessary.
Stability: 3 - Locked
Only fixes related to security, performance, or bug fixes will be accepted.
Please do not suggest API 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 was added in Node.js v0.6.12. It is experimental.