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# package-json [](https://travis-ci.org/sindresorhus/package-json) > Get metadata of a package from the npm registry ## Install ``` $ npm install --save package-json ``` ## Usage ```js const packageJson = require('package-json'); packageJson('ava').then(json => { console.log(json); //=> {name: 'ava', ...} }); // Also works with scoped packages packageJson('@sindresorhus/df').then(json => { console.log(json); //=> {name: '@sindresorhus/df', ...} }); ``` ## API ### packageJson(name, [options]) #### name 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. ## 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 ## License MIT © [Sindre Sorhus](https://sindresorhus.com)