# Changelog

## v2.3.0 / 2021-04-01

- Added TypeScript types
- Added consistent support for custom `.toString()` methods on arguments, thanks [Stanislav Titenko](https://github.com/resetko)

## v2.2.6 / 2018-06-08

- Fixed compatibility issue with usage in an es module environment

## v2.2.5 / 2016-05-02

- Improved performance of `dedupe` variant even further, thanks [Andres Suarez](https://github.com/zertosh)

## v2.2.4 / 2016-04-25

- Improved performance of `dedupe` variant by about 2x, thanks [Bartosz Gościński](https://github.com/bgoscinski)

## v2.2.3 / 2016-01-05

- Updated `bind` variant to use `[].join(' ')` as per the main script in 2.2.2

## v2.2.2 / 2016-01-04

- Switched from string concatenation to `[].join(' ')` for a slight performance gain in the main function.

## v2.2.1 / 2015-11-26

- Add deps parameter to the AMD module, fixes an issue using the Dojo loader, thanks [Chris Jordan](https://github.com/flipperkid)

## v2.2.0 / 2015-10-18

- added a new `bind` variant for use with [css-modules](https://github.com/css-modules/css-modules) and similar abstractions, thanks to [Kirill Yakovenko](https://github.com/blia)

## v2.1.5 / 2015-09-30

- reverted a new usage of `Object.keys` in `dedupe.js` that slipped through in the last release

## v2.1.4 / 2015-09-30

- new case added to benchmarks
- safer `hasOwnProperty` check
- AMD module is now named, so you can do the following:

```
define(["classnames"], function (classNames) {
  var style = classNames("foo", "bar");
  // ...
});
```

## v2.1.3 / 2015-07-02

- updated UMD wrapper to support AMD and CommonJS on the same pacge

## v2.1.2 / 2015-05-28

- added a proper UMD wrapper

## v2.1.1 / 2015-05-06

- minor performance improvement thanks to type caching
- improved benchmarking and results output

## v2.1.0 / 2015-05-05

- added alternate `dedupe` version of classNames, which is slower (10x) but ensures that if a class is added then overridden by a falsy value in a subsequent argument, it is excluded from the result.

## v2.0.0 / 2015-05-03

- performance improvement; switched to `Array.isArray` for type detection, which is much faster in modern browsers. A polyfill is now required for IE8 support, see the Readme for details.

## v1.2.2 / 2015-04-28

- license comment updates to simiplify certain build scenarios

## v1.2.1 / 2015-04-22

- added safe exporting for requireJS usage
- clarified Bower usage and instructions

## v1.2.0 / 2015-03-17

- added comprehensive support for array arguments, including nested arrays
- simplified code slightly

## Previous

Please see the git history for the details of previous versions.