# compare-versions

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Compare [semver](https://semver.org/) version strings to find greater, equal or lesser. Runs in the browser as well as Node.js/React Native etc. Has no dependencies and is tiny.

Supports the full semver specification including versions with different number of digits like `1.0.0`, `1.0`, `1` and pre-releases like `1.0.0-alpha`. Additionally supports the following variations:

- Wildcards for minor and patch version like `1.0.x` or `1.0.*`.
- [Chromium version numbers](https://www.chromium.org/developers/version-numbers) with 4 parts, e.g. version `25.0.1364.126`.
- Any leading `v` is ignored, e.g. `v1.0` is interpreted as `1.0`.
- Leading zero is ignored, e.g. `1.01.1` is interpreted as `1.1.1`.

## Install

```bash
$ npm install compare-versions
```

Note: Starting from v4 this library includes a ESM version which will automatically be selected by your bundler (webpack, parcel etc). The old CJS version is `index.js` and the new ESM version is `index.mjs`.

## Usage

Will return `1` if first version is greater, `0` if versions are equal, and `-1` if the second version is greater:

```javascript
import compareVersions from 'compare-versions';

compareVersions('11.1.1', '10.0.0'); //  1
compareVersions('10.0.0', '10.0.0'); //  0
compareVersions('10.0.0', '11.1.1'); // -1
```

Can also be used for sorting:

```javascript
const versions = [
  '1.5.19',
  '1.2.3',
  '1.5.5'
]
const sorted = versions.sort(compareVersions);
/*
[
  '1.2.3',
  '1.5.5',
  '1.5.19'
]
*/
const sortDescending = versions.sort(compareVersions).reverse();
/*
[
  '1.5.19'
  '1.5.5',
  '1.2.3',
]
*/
```

### "Human Readable" Compare

The alternative `compare` function accepts an operator which will be more familiar to humans:

```js
import { compare } from 'compare-versions';

compare('10.1.8', '10.0.4', '>');  // true
compare('10.0.1', '10.0.1', '=');  // true
compare('10.1.1', '10.2.2', '<');  // true
compare('10.1.1', '10.2.2', '<='); // true
compare('10.1.1', '10.2.2', '>='); // false
```

### Validate version numbers

Applies the same ruleset used comparing version numbers and returns a boolean:

```javascript
import { validate } from 'compare-versions';

validate('1.0.0-rc.1'); // true
validate('1.0-rc.1');   // false
validate('foo');        // false
```

### Browser

If included directly in the browser, `compareVersions()` is available on the global window:

```html
<script src="compare-versions/index.js"></script>
<script>
  window.compareVersions('11.0.0', '10.0.0');
  window.compareVersions.compare('11.0.0', '10.0.0', '>');
  window.compareVersions.validate('11.0.0');
</script>
```