1 # package-json [![Build Status](https://travis-ci.org/sindresorhus/package-json.svg?branch=master)](https://travis-ci.org/sindresorhus/package-json)
3 > Get metadata of a package from the npm registry
9 $ npm install --save package-json
16 const packageJson = require('package-json');
18 packageJson('ava').then(json => {
20 //=> {name: 'ava', ...}
23 // Also works with scoped packages
24 packageJson('@sindresorhus/df').then(json => {
26 //=> {name: '@sindresorhus/df', ...}
33 ### packageJson(name, [options])
50 Package version such as `1.0.0` or a [dist tag](https://docs.npmjs.com/cli/dist-tag) such as `latest`.
52 The version can also be in any format supported by the [semver](https://github.com/npm/node-semver) module. For example:
54 - `1` - get the latest `1.x.x`
55 - `1.2` - get the latest `1.2.x`
56 - `^1.2.3` - get the latest `1.x.x` but at least `1.2.3`
57 - `~1.2.3` - get the latest `1.2.x` but at least `1.2.3`
64 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)
71 Return the [main entry](https://registry.npmjs.org/ava) containing all versions.
76 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.
81 - [package-json-cli](https://github.com/sindresorhus/package-json-cli) - CLI for this module
82 - [latest-version](https://github.com/sindresorhus/latest-version) - Get the latest version of an npm package
83 - [pkg-versions](https://github.com/sindresorhus/pkg-versions) - Get the version numbers of a package from the npm registry
84 - [npm-keyword](https://github.com/sindresorhus/npm-keyword) - Get a list of npm packages with a certain keyword
85 - [npm-user](https://github.com/sindresorhus/npm-user) - Get user info of an npm user
86 - [npm-email](https://github.com/sindresorhus/npm-email) - Get the email of an npm user
91 MIT © [Sindre Sorhus](https://sindresorhus.com)