* Prevent event handlers from receiving extra argument (dev only) ([@aweary](https://github.com/aweary) in [#10115](https://github.com/facebook/react/pull/8363)

title: "React v15.6.2"

author: nhunzaker

Today we're sending out React 15.6.2. In 15.6.1, we shipped a few fixes for change events and inputs that had some unintended consequences. Those regressions have been ironed out, and we've also included a few more fixes to improve the stability of React across all browsers.

Additionally, 15.6.2 adds support for the [`controlList`](https://developers.google.com/web/updates/2017/03/chrome-58-media-updates#controlslist) attribute, and CSS columns are no longer appended with a `px` suffix.

We recommend using [Yarn](https://yarnpkg.com/) or [npm](https://www.npmjs.com/) for managing front-end dependencies. If you're new to package managers, the [Yarn documentation](https://yarnpkg.com/en/docs/getting-started) is a good place to get started.

To install React with Yarn, run:

yarn add react@^15.6.2 react-dom@^15.6.2

To install React with npm, run:

npm install --save react@^15.6.2 react-dom@^15.6.2

We recommend using a bundler like [webpack](https://webpack.js.org/) or [Browserify](http://browserify.org/) so you can write modular code and bundle it together into small packages to optimize load time.

Remember that by default, React runs extra checks and provides helpful warnings in development mode. When deploying your app, make sure to [use the production build](/react/docs/optimizing-performance.html#use-the-production-build).

In case you don't use a bundler, we also provide pre-built bundles in the npm packages which you can [include as script tags](/react/docs/installation.html#using-a-cdn) on your page:

* **React**<br/>

Dev build with warnings: [react/dist/react.js](https://unpkg.com/react@15.6.2/dist/react.js)<br/>

Minified build for production: [react/dist/react.min.js](https://unpkg.com/react@15.6.2/dist/react.min.js)<br/>

* **React with Add-Ons**<br/>

Dev build with warnings: [react/dist/react-with-addons.js](https://unpkg.com/react@15.6.2/dist/react-with-addons.js)<br/>

Minified build for production: [react/dist/react-with-addons.min.js](https://unpkg.com/react@15.5.0/dist/react-with-addons.min.js)<br/>

* **React DOM** (include React in the page before React DOM)<br/>

Dev build with warnings: [react-dom/dist/react-dom.js](https://unpkg.com/react-dom@15.6.2/dist/react-dom.js)<br/>

Minified build for production: [react-dom/dist/react-dom.min.js](https://unpkg.com/react-dom@15.6.2/dist/react-dom.min.js)<br/>

* **React DOM Server** (include React in the page before React DOM Server)<br/>

Dev build with warnings: [react-dom/dist/react-dom-server.js](https://unpkg.com/react-dom@15.6.2/dist/react-dom-server.js)<br/>

Minified build for production: [react-dom/dist/react-dom-server.min.js](https://unpkg.com/react-dom@15.6.2/dist/react-dom-server.min.js)<br/>

We've also published version `15.6.2` of `react` and `react-dom` on npm, and the `react` package on bower.

* Fix a bug where modifying document.documentMode would trigger IE detection in other browsers, breaking change events ([@aweary](https://github.com/aweary) in [#10032](https://github.com/facebook/react/pull/10032)

* CSS Columns are treated as unitless numbers ([@aweary](https://github.com/aweary) in [#10115](https://github.com/facebook/react/pull/10115)

* Fix bug in QtWebKit when wrapping synthetic events in proxies ([@walrusfruitcake](https://github.com/walrusfruitcake) in [#10115](https://github.com/facebook/react/pull/10011)

* Prevent event handlers from receiving extra argument (dev only) ([@aweary](https://github.com/aweary) in [#10115](https://github.com/facebook/react/pull/8363)

* Fix cases where onChange would not fire with defaultChecked on radio inputs ([@jquense](https://github.com/jquense) in [#10156](https://github.com/facebook/react/pull/10156))

* Add support for controlList attribute to DOM property whitelist ([@nhunzaker](https://github.com/nhunzaker) in [#9940](https://github.com/facebook/react/pull/9940))