Ant Design React is dedicated to providing a **good development experience** for programmers. Make sure that you have installed [Node.js](https://nodejs.org/)(> 8.0.0) correctly.
If you try in local environment, Please refer to [Install and Initialization](https://ant.design/docs/react/use-with-create-react-app#Install-and-Initialization) section of "Use in create-react-app".
> Before delving into Ant Design React, a good knowledge base of [React](https://reactjs.org) and [JavaScript ES2015](http://babeljs.io/docs/learn-es2015/) is needed.
Replace the content of `index.js` with the following code. As you can see, there is no difference between antd's components and typical React components.
If you already set up by [Install and Initialization](https://ant.design/docs/react/use-with-create-react-app#Install-and-Initialization) section of "Use in create-react-app", Please replace the content of /src/index.js
You can look up components in the side menu like the [Alert](/components/alert) component. Plenty of examples are provided in the component pages and API documentation.
Click the "Open in Editor" icon in the first example to open an editor with source code to use out-of-the-box. Now you can import the `Alert` component into the codesandbox:
OK! Now you know how to use antd components in a clear way. You are welcome to explore more components in the codesandbox. We also strongly recommend using codesandbox to provide a reproducible demo when reporting a bug.
In the real world you will need a development workflow consisting of `compile/build/deploy/lint/debug`. You can find and read articles on the subject or try other scaffolds provided below:
We offer very limited support for IE9/10 which means some styles and animations will be mininal for them. Also, we use Flex layout in a few components.
Polyfills are needed for IE browsers. We recommend [babel-preset-env](https://babeljs.io/docs/en/babel-preset-env) for it. You can set `targets` config if you are using [umi](http://umijs.org/).
Also, you can use any [scaffold](https://github.com/enaqx/awesome-react#boilerplates) available in the React ecosystem. If you encounter problems, you can use our [webpack config](https://github.com/ant-tool/atool-build/blob/master/src/getWebpackCommonConfig.js) and [modify it](http://ant-tool.github.io/webpack-config.html).
There are some [scaffolds](http://scaffold.ant.design/) which have already integrated antd, so you can try and start with one of these and even contribute.
If you see logs like in the screenshot below, you might be importing all components by writing `import { Button } from 'antd';`. This will affect your app's network performance.
We strongly recommend using [babel-plugin-import](https://github.com/ant-design/babel-plugin-import), which can convert the following code to the 'antd/es/xxx' way:
> FYI, babel-plugin-import's `style` option will importing some global reset styles, don't use it if you don't need those styles. You can import styles manually via `import 'antd/dist/antd.css'` and override the global reset styles.
You can use [antd-dayjs-webpack-plugin](https://github.com/ant-design/antd-dayjs-webpack-plugin) plugin to replace momentjs to Day.js to reduce bundle size dramatically. You need to update your webpack config file like this:
```js
// webpack-config.js
import AntdDayjsWebpackPlugin from 'antd-dayjs-webpack-plugin';