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# semver-diff [![Build Status](https://travis-ci.org/sindresorhus/semver-diff.svg?branch=master)](https://travis-ci.org/sindresorhus/semver-diff) > Get the diff type of two [semver](https://github.com/isaacs/node-semver) versions: `0.0.1 0.0.2` → `patch` ## Install ```sh $ npm install --save semver-diff ``` ## Usage ```js var semverDiff = require('semver-diff'); semverDiff('1.1.1', '1.1.2'); //=> 'patch' semverDiff('0.0.1', '1.0.0'); //=> 'major' semverDiff('0.0.1', '0.1.0'); //=> 'minor' semverDiff('0.0.1-foo', '0.0.1-foo.bar'); //=> 'prerelease' semverDiff('0.1.0', '0.1.0+foo'); //=> 'build' semverDiff('0.0.1', '0.0.1'); //=> null semverDiff('0.0.2', '0.0.1'); //=> null ``` ## API ### semverDiff(versionA, versionB) Returns the difference type between two semver versions, or `null` if they're identical or the second one is lower than the first. Possible values: `'major'`, `'minor'`, `'patch'`, `'prerelease'`, `'build'`, `null`. ## License MIT © [Sindre Sorhus](http://sindresorhus.com)