Questionnaire-of-the-Facebo.../node_modules/semver-diff/readme.md

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2021-03-11 01:43:28 +00:00
# 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/npm/node-semver) versions: `0.0.1 0.0.2` → `patch`
## Install
```
$ npm install semver-diff
```
## Usage
```js
const semverDiff = require('semver-diff');
semverDiff('1.1.1', '1.1.2');
//=> 'patch'
semverDiff('1.1.1-foo', '1.1.2');
//=> 'prepatch'
semverDiff('0.0.1', '1.0.0');
//=> 'major'
semverDiff('0.0.1-foo', '1.0.0');
//=> 'premajor'
semverDiff('0.0.1', '0.1.0');
//=> 'minor'
semverDiff('0.0.1-foo', '0.1.0');
//=> 'preminor'
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');
//=> undefined
semverDiff('0.0.2', '0.0.1');
//=> undefined
```
## API
### semverDiff(versionA, versionB)
Returns the difference type between two semver versions, or `undefined` if they're identical or the second one is lower than the first.
Possible values: `'major'`, `'premajor'`, `'minor'`, `'preminor'`, `'patch'`, `'prepatch'`, `'prerelease'`, `'build'`, `undefined`.
## Related
- [latest-semver](https://github.com/sindresorhus/latest-semver) - Get the latest stable semver version from an array of versions
- [to-semver](https://github.com/sindresorhus/to-semver) - Get an array of valid, sorted, and cleaned semver versions from an array of strings
- [semver-regex](https://github.com/sindresorhus/semver-regex) - Regular expression for matching semver versions
- [semver-truncate](https://github.com/sindresorhus/semver-truncate) - Truncate a semver version: `1.2.3``1.2.0`
---
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