Current File : /opt/alt/alt-nodejs12/root/usr/lib/node_modules/npm/node_modules.bundled/semver-diff//readme.md
# semver-diff [](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)
