255 lines
11 KiB
Markdown
255 lines
11 KiB
Markdown
# **node-addon-api module**
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This module contains **header-only C++ wrapper classes** which simplify
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the use of the C based [N-API](https://nodejs.org/dist/latest/docs/api/n-api.html)
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provided by Node.js when using C++. It provides a C++ object model
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and exception handling semantics with low overhead.
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N-API is an ABI stable C interface provided by Node.js for building native
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addons. It is independent from the underlying JavaScript runtime (e.g. V8 or ChakraCore)
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and is maintained as part of Node.js itself. It is intended to insulate
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native addons from changes in the underlying JavaScript engine and allow
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modules compiled for one version to run on later versions of Node.js without
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recompilation.
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The `node-addon-api` module, which is not part of Node.js, preserves the benefits
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of the N-API as it consists only of inline code that depends only on the stable API
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provided by N-API. As such, modules built against one version of Node.js
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using node-addon-api should run without having to be rebuilt with newer versions
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of Node.js.
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It is important to remember that *other* Node.js interfaces such as
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`libuv` (included in a project via `#include <uv.h>`) are not ABI-stable across
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Node.js major versions. Thus, an addon must use N-API and/or `node-addon-api`
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exclusively and build against a version of Node.js that includes an
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implementation of N-API (meaning an active LTS version of Node.js) in
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order to benefit from ABI stability across Node.js major versions. Node.js
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provides an [ABI stability guide][] containing a detailed explanation of ABI
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stability in general, and the N-API ABI stability guarantee in particular.
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As new APIs are added to N-API, node-addon-api must be updated to provide
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wrappers for those new APIs. For this reason node-addon-api provides
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methods that allow callers to obtain the underlying N-API handles so
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direct calls to N-API and the use of the objects/methods provided by
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node-addon-api can be used together. For example, in order to be able
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to use an API for which the node-addon-api does not yet provide a wrapper.
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APIs exposed by node-addon-api are generally used to create and
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manipulate JavaScript values. Concepts and operations generally map
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to ideas specified in the **ECMA262 Language Specification**.
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The [N-API Resource](http://nodejs.github.io/node-addon-examples/) offers an
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excellent orientation and tips for developers just getting started with N-API
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and node-addon-api.
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- **[Setup](#setup)**
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- **[API Documentation](#api)**
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- **[Examples](#examples)**
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- **[Tests](#tests)**
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- **[More resource and info about native Addons](#resources)**
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- **[Badges](#badges)**
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- **[Code of Conduct](CODE_OF_CONDUCT.md)**
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- **[Contributors](#contributors)**
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- **[License](#license)**
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## **Current version: 3.0.2**
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(See [CHANGELOG.md](CHANGELOG.md) for complete Changelog)
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[](https://nodei.co/npm/node-addon-api/) [](https://nodei.co/npm/node-addon-api/)
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<a name="setup"></a>
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node-addon-api is based on [N-API](https://nodejs.org/api/n-api.html) and supports using different N-API versions.
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This allows addons built with it to run with Node.js versions which support the targeted N-API version.
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**However** the node-addon-api support model is to support only the active LTS Node.js versions. This means that
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every year there will be a new major which drops support for the Node.js LTS version which has gone out of service.
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The oldest Node.js version supported by the current version of node-addon-api is Node.js 10.x.
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## Setup
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- [Installation and usage](doc/setup.md)
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- [node-gyp](doc/node-gyp.md)
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- [cmake-js](doc/cmake-js.md)
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- [Conversion tool](doc/conversion-tool.md)
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- [Checker tool](doc/checker-tool.md)
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- [Generator](doc/generator.md)
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- [Prebuild tools](doc/prebuild_tools.md)
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<a name="api"></a>
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### **API Documentation**
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The following is the documentation for node-addon-api.
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- [Full Class Hierarchy](doc/hierarchy.md)
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- [Addon Structure](doc/addon.md)
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- Data Types:
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- [Env](doc/env.md)
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- [CallbackInfo](doc/callbackinfo.md)
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- [Reference](doc/reference.md)
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- [Value](doc/value.md)
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- [Name](doc/name.md)
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- [Symbol](doc/symbol.md)
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- [String](doc/string.md)
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- [Number](doc/number.md)
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- [Date](doc/date.md)
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- [BigInt](doc/bigint.md)
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- [Boolean](doc/boolean.md)
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- [External](doc/external.md)
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- [Object](doc/object.md)
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- [Array](doc/array.md)
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- [ObjectReference](doc/object_reference.md)
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- [PropertyDescriptor](doc/property_descriptor.md)
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- [Function](doc/function.md)
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- [FunctionReference](doc/function_reference.md)
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- [ObjectWrap](doc/object_wrap.md)
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- [ClassPropertyDescriptor](doc/class_property_descriptor.md)
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- [Buffer](doc/buffer.md)
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- [ArrayBuffer](doc/array_buffer.md)
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- [TypedArray](doc/typed_array.md)
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- [TypedArrayOf](doc/typed_array_of.md)
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- [DataView](doc/dataview.md)
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- [Error Handling](doc/error_handling.md)
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- [Error](doc/error.md)
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- [TypeError](doc/type_error.md)
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- [RangeError](doc/range_error.md)
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- [Object Lifetime Management](doc/object_lifetime_management.md)
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- [HandleScope](doc/handle_scope.md)
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- [EscapableHandleScope](doc/escapable_handle_scope.md)
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- [Memory Management](doc/memory_management.md)
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- [Async Operations](doc/async_operations.md)
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- [AsyncWorker](doc/async_worker.md)
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- [AsyncContext](doc/async_context.md)
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- [AsyncWorker Variants](doc/async_worker_variants.md)
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- [Thread-safe Functions](doc/threadsafe_function.md)
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- [Promises](doc/promises.md)
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- [Version management](doc/version_management.md)
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<a name="examples"></a>
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### **Examples**
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Are you new to **node-addon-api**? Take a look at our **[examples](https://github.com/nodejs/node-addon-examples)**
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- **[Hello World](https://github.com/nodejs/node-addon-examples/tree/master/1_hello_world/node-addon-api)**
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- **[Pass arguments to a function](https://github.com/nodejs/node-addon-examples/tree/master/2_function_arguments/node-addon-api)**
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- **[Callbacks](https://github.com/nodejs/node-addon-examples/tree/master/3_callbacks/node-addon-api)**
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- **[Object factory](https://github.com/nodejs/node-addon-examples/tree/master/4_object_factory/node-addon-api)**
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- **[Function factory](https://github.com/nodejs/node-addon-examples/tree/master/5_function_factory/node-addon-api)**
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- **[Wrapping C++ Object](https://github.com/nodejs/node-addon-examples/tree/master/6_object_wrap/node-addon-api)**
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- **[Factory of wrapped object](https://github.com/nodejs/node-addon-examples/tree/master/7_factory_wrap/node-addon-api)**
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- **[Passing wrapped object around](https://github.com/nodejs/node-addon-examples/tree/master/8_passing_wrapped/node-addon-api)**
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<a name="tests"></a>
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### **Tests**
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To run the **node-addon-api** tests do:
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```
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npm install
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npm test
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```
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To avoid testing the deprecated portions of the API run
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```
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npm install
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npm test --disable-deprecated
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```
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### **Debug**
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To run the **node-addon-api** tests with `--debug` option:
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```
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npm run-script dev
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```
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If you want faster build, you might use the following option:
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```
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npm run-script dev:incremental
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```
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Take a look and get inspired by our **[test suite](https://github.com/nodejs/node-addon-api/tree/master/test)**
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### **Benchmarks**
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You can run the available benchmarks using the following command:
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```
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npm run-script benchmark
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```
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See [benchmark/README.md](benchmark/README.md) for more details about running and adding benchmarks.
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<a name="resources"></a>
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### **More resource and info about native Addons**
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- **[C++ Addons](https://nodejs.org/dist/latest/docs/api/addons.html)**
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- **[N-API](https://nodejs.org/dist/latest/docs/api/n-api.html)**
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- **[N-API - Next Generation Node API for Native Modules](https://youtu.be/-Oniup60Afs)**
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As node-addon-api's core mission is to expose the plain C N-API as C++
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wrappers, tools that facilitate n-api/node-addon-api providing more
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convenient patterns on developing a Node.js add-ons with n-api/node-addon-api
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can be published to NPM as standalone packages. It is also recommended to tag
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such packages with `node-addon-api` to provide more visibility to the community.
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Quick links to NPM searches: [keywords:node-addon-api](https://www.npmjs.com/search?q=keywords%3Anode-addon-api).
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<a name="badges"></a>
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### **Badges**
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The use of badges is recommended to indicate the minimum version of N-API
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required for the module. This helps to determine which Node.js major versions are
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supported. Addon maintainers can consult the [N-API support matrix][] to determine
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which Node.js versions provide a given N-API version. The following badges are
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available:
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## **Contributing**
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We love contributions from the community to **node-addon-api**!
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See [CONTRIBUTING.md](CONTRIBUTING.md) for more details on our philosophy around extending this module.
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<a name="contributors"></a>
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## Team members
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### Active
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| Name | GitHub Link |
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| ------------------- | ----------------------------------------------------- |
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| Anna Henningsen | [addaleax](https://github.com/addaleax) |
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| Chengzhong Wu | [legendecas](https://github.com/legendecas) |
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| Gabriel Schulhof | [gabrielschulhof](https://github.com/gabrielschulhof) |
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| Hitesh Kanwathirtha | [digitalinfinity](https://github.com/digitalinfinity) |
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| Jim Schlight | [jschlight](https://github.com/jschlight) |
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| Michael Dawson | [mhdawson](https://github.com/mhdawson) |
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| Kevin Eady | [KevinEady](https://github.com/KevinEady)
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| Nicola Del Gobbo | [NickNaso](https://github.com/NickNaso) |
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### Emeritus
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| Name | GitHub Link |
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| ------------------- | ----------------------------------------------------- |
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| Arunesh Chandra | [aruneshchandra](https://github.com/aruneshchandra) |
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| Benjamin Byholm | [kkoopa](https://github.com/kkoopa) |
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| Jason Ginchereau | [jasongin](https://github.com/jasongin) |
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| Sampson Gao | [sampsongao](https://github.com/sampsongao) |
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| Taylor Woll | [boingoing](https://github.com/boingoing) |
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<a name="license"></a>
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Licensed under [MIT](./LICENSE.md)
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[ABI stability guide]: https://nodejs.org/en/docs/guides/abi-stability/
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[N-API support matrix]: https://nodejs.org/dist/latest/docs/api/n-api.html#n_api_n_api_version_matrix
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