119 lines
3.5 KiB
Markdown
119 lines
3.5 KiB
Markdown
# package-json [](https://travis-ci.org/sindresorhus/package-json)
|
|
|
|
> Get metadata of a package from the npm registry
|
|
|
|
|
|
## Install
|
|
|
|
```
|
|
$ npm install package-json
|
|
```
|
|
|
|
|
|
## Usage
|
|
|
|
```js
|
|
const packageJson = require('package-json');
|
|
|
|
(async () => {
|
|
console.log(await packageJson('ava'));
|
|
//=> {name: 'ava', ...}
|
|
|
|
// Also works with scoped packages
|
|
console.log(await packageJson('@sindresorhus/df'));
|
|
})();
|
|
```
|
|
|
|
|
|
## API
|
|
|
|
### packageJson(packageName, options?)
|
|
|
|
#### packageName
|
|
|
|
Type: `string`
|
|
|
|
Name of the package.
|
|
|
|
#### options
|
|
|
|
Type: `object`
|
|
|
|
##### version
|
|
|
|
Type: `string`<br>
|
|
Default: `latest`
|
|
|
|
Package version such as `1.0.0` or a [dist tag](https://docs.npmjs.com/cli/dist-tag) such as `latest`.
|
|
|
|
The version can also be in any format supported by the [semver](https://github.com/npm/node-semver) module. For example:
|
|
|
|
- `1` - Get the latest `1.x.x`
|
|
- `1.2` - Get the latest `1.2.x`
|
|
- `^1.2.3` - Get the latest `1.x.x` but at least `1.2.3`
|
|
- `~1.2.3` - Get the latest `1.2.x` but at least `1.2.3`
|
|
|
|
##### fullMetadata
|
|
|
|
Type: `boolean`<br>
|
|
Default: `false`
|
|
|
|
By default, only an abbreviated metadata object is returned for performance reasons. [Read more.](https://github.com/npm/registry/blob/master/docs/responses/package-metadata.md)
|
|
|
|
##### allVersions
|
|
|
|
Type: `boolean`<br>
|
|
Default: `false`
|
|
|
|
Return the [main entry](https://registry.npmjs.org/ava) containing all versions.
|
|
|
|
##### registryUrl
|
|
|
|
Type: `string`<br>
|
|
Default: Auto-detected
|
|
|
|
The registry URL is by default inferred from the npm defaults and `.npmrc`. This is beneficial as `package-json` and any project using it will work just like npm. This option is **only** intended for internal tools. You should **not** use this option in reusable packages. Prefer just using `.npmrc` whenever possible.
|
|
|
|
##### agent
|
|
|
|
Type: `http.Agent | https.Agent | object | false`
|
|
|
|
Overwrite the `agent` option that is passed down to [`got`](https://github.com/sindresorhus/got#agent). This might be useful to add [proxy support](https://github.com/sindresorhus/got#proxies).
|
|
|
|
|
|
### packageJson.PackageNotFoundError
|
|
|
|
The error thrown when the given package name cannot be found.
|
|
|
|
### packageJson.VersionNotFoundError
|
|
|
|
The error thrown when the given package version cannot be found.
|
|
|
|
|
|
## Authentication
|
|
|
|
Both public and private registries are supported, for both scoped and unscoped packages, as long as the registry uses either bearer tokens or basic authentication.
|
|
|
|
|
|
## Related
|
|
|
|
- [package-json-cli](https://github.com/sindresorhus/package-json-cli) - CLI for this module
|
|
- [latest-version](https://github.com/sindresorhus/latest-version) - Get the latest version of an npm package
|
|
- [pkg-versions](https://github.com/sindresorhus/pkg-versions) - Get the version numbers of a package from the npm registry
|
|
- [npm-keyword](https://github.com/sindresorhus/npm-keyword) - Get a list of npm packages with a certain keyword
|
|
- [npm-user](https://github.com/sindresorhus/npm-user) - Get user info of an npm user
|
|
- [npm-email](https://github.com/sindresorhus/npm-email) - Get the email of an npm user
|
|
|
|
|
|
---
|
|
|
|
<div align="center">
|
|
<b>
|
|
<a href="https://tidelift.com/subscription/pkg/npm-package-json?utm_source=npm-package-json&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>
|
|
</b>
|
|
<br>
|
|
<sub>
|
|
Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
|
|
</sub>
|
|
</div>
|