1# semver-diff [](https://travis-ci.org/sindresorhus/semver-diff) 2 3> Get the diff type of two [semver](https://github.com/isaacs/node-semver) versions: `0.0.1 0.0.2` → `patch` 4 5 6## Install 7 8```sh 9$ npm install --save semver-diff 10``` 11 12 13## Usage 14 15```js 16var semverDiff = require('semver-diff'); 17 18semverDiff('1.1.1', '1.1.2'); 19//=> 'patch' 20 21semverDiff('0.0.1', '1.0.0'); 22//=> 'major' 23 24semverDiff('0.0.1', '0.1.0'); 25//=> 'minor' 26 27semverDiff('0.0.1-foo', '0.0.1-foo.bar'); 28//=> 'prerelease' 29 30semverDiff('0.1.0', '0.1.0+foo'); 31//=> 'build' 32 33semverDiff('0.0.1', '0.0.1'); 34//=> null 35 36semverDiff('0.0.2', '0.0.1'); 37//=> null 38``` 39 40 41## API 42 43### semverDiff(versionA, versionB) 44 45Returns the difference type between two semver versions, or `null` if they're identical or the second one is lower than the first. 46 47Possible values: `'major'`, `'minor'`, `'patch'`, `'prerelease'`, `'build'`, `null`. 48 49 50## License 51 52MIT © [Sindre Sorhus](http://sindresorhus.com) 53
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