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discord.js/packages/api-extractor-model/README.md
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Markdown

# @microsoft/api-extractor-model
Use this library to read and write \*.api.json files as defined by the [API Extractor](https://api-extractor.com/) tool.
These files are used to generate a documentation website for your TypeScript package. The files store the
API signatures and doc comments that were extracted from your package.
API documentation for this package: https://rushstack.io/pages/api/api-extractor-model/
## Example Usage
The following code sample shows how to load `example.api.json`, which would be generated by API Extractor
when it analyzes a hypothetical NPM package called `example`:
```ts
import { ApiModel, ApiPackage } from '@discordjs/api-extractor-model';
const apiModel: ApiModel = new ApiModel();
const apiPackage: ApiPackage = apiModel.loadPackage('example.api.json');
for (const member of apiPackage.members) {
console.log(member.displayName);
}
```
The `ApiModel` is acts as a container for various packages that are loaded and operated on as a group.
For example, a documentation tool may need to resolve `@link` references across different packages.
In this case we would load the various packages into the `ApiModel`, and then use
the `ApiModel.resolveDeclarationReference()` to resolve the `@link` targets.
The data structure forms a tree of various classes that start with the `Api` prefix. The nesting hierarchy
might look like this:
```
- ApiModel
- ApiPackage
- ApiEntryPoint
- ApiClass
- ApiMethod
- ApiProperty
- ApiEnum
- ApiEnumMember
- ApiInterface
- ApiMethodSignature
- ApiPropertySignature
- ApiNamespace
- (ApiClass, ApiEnum, ApiInterface, ...)
```
You can use the `ApiItem.members` property to traverse this tree.
Note that the non-abstract classes (e.g. `ApiClass`, `ApiEnum`, `ApiInterface`, etc.) use
TypeScript "mixin" functions (e.g. `ApiDeclaredItem`, `ApiItemContainerMixin`, etc.) to add various
features that cannot be represented as a normal inheritance chain (since TypeScript does not allow a child class
to extend more than one base class). The "mixin" is a TypeScript merged declaration with three components:
the function that generates a subclass, an interface that describes the members of the subclass, and
a namespace containing static members of the class.
> For a complete project that uses these APIs to generate an API reference web site,
> see the [@microsoft/api-documenter](https://www.npmjs.com/package/@microsoft/api-documenter) source code.
## Links
- [CHANGELOG.md](https://github.com/microsoft/rushstack/blob/main/libraries/api-extractor-model/CHANGELOG.md) - Find
out what's new in the latest version
- [API Reference](https://rushstack.io/pages/api/api-extractor-model/)
API Extractor is part of the [Rush Stack](https://rushstack.io/) family of projects.