Jim
9 years ago
committed by
jim
jim
6 changed files with 219 additions and 164 deletions
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--- |
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id: language-tooling |
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title: Language Tooling |
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permalink: language-tooling.html |
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prev: tooling-integration.html |
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next: package-management.html |
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--- |
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|
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## ES2015 with JSX |
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### In-browser JSX Transform |
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If you like using JSX, Babel 5 provided an in-browser ES2015 and JSX transformer for development called browser.js that can be included from [CDNJS](https://cdnjs.com/libraries/babel-core/5.8.34). Include a `<script type="text/babel">` tag to engage the JSX transformer. |
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> Note: |
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> |
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> The in-browser JSX transformer is fairly large and results in extraneous computation client-side that can be avoided. Do not use it in production — see the next section. |
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### Productionizing: Precompiled JSX |
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If you have [npm](https://www.npmjs.com/), you can run `npm install -g babel-cli`. Babel has built-in support for React v0.12+. Tags are automatically transformed to their equivalent `React.createElement(...)`, `displayName` is automatically inferred and added to all `React.createClass` calls. |
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This tool will translate files that use JSX syntax to plain JavaScript files that can run directly in the browser. It will also watch directories for you and automatically transform files when they are changed; for example: `babel --watch src/ --out-dir lib/`. |
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Beginning with Babel 6, there are no transforms included by default. This means that options must be specified when running the `babel` command, or a `.babelrc` must specify options. Additional packages must also be installed which bundle together a number of transforms, called presets. The most common use when working with React will be to include the `es2015` and `react` presets. More information about the changes to Babel can be found in [their blog post announcing Babel 6](http://babeljs.io/blog/2015/10/29/6.0.0). |
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Here is an example of what you will do if using ES2015 syntax and React: |
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``` |
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npm install babel-preset-es2015 babel-preset-react |
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babel --presets es2015,react --watch src/ --out-dir lib/ |
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``` |
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By default JSX files with a `.js` extension are transformed. Run `babel --help` for more information on how to use Babel. |
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Example output: |
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``` |
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$ cat test.js |
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var HelloMessage = React.createClass({ |
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render: function() { |
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return <div>Hello {this.props.name}</div>; |
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} |
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}); |
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ReactDOM.render(<HelloMessage name="John" />, mountNode); |
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$ babel test.js |
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"use strict"; |
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var HelloMessage = React.createClass({ |
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displayName: "HelloMessage", |
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render: function render() { |
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return React.createElement( |
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"div", |
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null, |
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"Hello ", |
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this.props.name |
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); |
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} |
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}); |
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ReactDOM.render(React.createElement(HelloMessage, { name: "John" }), mountNode); |
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``` |
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### Helpful Open-Source Projects |
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The open-source community has built tools that integrate JSX with several editors and build systems. See [JSX integrations](https://github.com/facebook/react/wiki/Complementary-Tools#jsx-integrations) for the full list. |
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## Flow |
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Flow is a JavaScript type checker released by Facebook, and it supports JSX. For more info, checkout the [Flow homepage](http://flowtype.org/). |
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## TypeScript |
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Microsoft TypeScript now supports JSX. For more info, check out the [TypeScript JSX Documentation](http://www.typescriptlang.org/docs/handbook/jsx.html) or their guide on [getting started with react+webpack](https://github.com/Microsoft/TypeScript-Handbook/blob/master/pages/quick-start/react-webpack.md). |
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@ -0,0 +1,126 @@ |
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--- |
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id: package-management |
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title: Package Management |
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permalink: package-management.html |
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prev: language-tooling.html |
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next: addons.html |
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--- |
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|
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## CDN-hosted React |
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We provide CDN-hosted versions of React [on our download page](/react/downloads.html). These pre-built files use the UMD module format. Dropping them in with a simple `<script>` tag will inject the `React` and `ReactDOM` globals into your environment. It should also work out-of-the-box in CommonJS and AMD environments. |
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## Using React from npm |
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You can use React with a CommonJS module system like [browserify](http://browserify.org/) or [webpack](https://webpack.github.io/). Use the [`react`](https://www.npmjs.com/package/react) and [`react-dom`](https://www.npmjs.com/package/react-dom) npm packages. |
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```js |
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// main.js |
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var React = require('react'); |
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var ReactDOM = require('react-dom'); |
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ReactDOM.render( |
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<h1>Hello, world!</h1>, |
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document.getElementById('example') |
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); |
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``` |
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Configure [babel](https://babeljs.io/) with a `.babelrc` file: |
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```json |
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{ "presets": ["react"] } |
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``` |
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> Note: |
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> |
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> If you are using ES2015, you will want to also use the `babel-preset-es2015` package. |
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To install React DOM and build your bundle with browserify: |
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```sh |
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$ npm install --save react react-dom babelify babel-preset-react |
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$ browserify -t [ babelify ] main.js -o bundle.js |
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``` |
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To install React DOM and build your bundle with webpack: |
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```sh |
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$ npm install --save react react-dom babel-preset-react babel-loader babel-core |
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$ webpack main.js bundle.js --module-bind 'js=babel-loader' |
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``` |
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> Note: |
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> |
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> If you are using ES2015, you will want to also use the `babel-preset-es2015` package. |
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**Note:** by default, React will be in development mode, which is slower, and not advised for production. To use React in production mode, set the environment variable `NODE_ENV` to `production` (using envify or webpack's DefinePlugin). For example: |
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```js |
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new webpack.DefinePlugin({ |
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"process.env": { |
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NODE_ENV: JSON.stringify("production") |
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} |
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}); |
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``` |
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Update your HTML file as below: |
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```html{8,12} |
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<!DOCTYPE html> |
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<html> |
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<head> |
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<meta charset="UTF-8" /> |
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<title>Hello React!</title> |
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<script src="build/react.js"></script> |
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<script src="build/react-dom.js"></script> |
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<!-- No need for Babel! --> |
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</head> |
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<body> |
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<div id="example"></div> |
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<script src="build/helloworld.js"></script> |
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</body> |
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</html> |
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``` |
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## Using React from Bower |
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Bower is a package manager optimized for the front-end development. If multiple packages depend on a package - jQuery for example - Bower will download jQuery just once. This is known as a flat dependency graph and it helps reduce page load. For more info, visit http://bower.io/ |
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If you'd like to use bower, it's as easy as: |
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``` |
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bower install --save react |
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``` |
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```html |
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<!DOCTYPE html> |
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<html> |
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<head> |
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<meta charset="UTF-8" /> |
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<title>Hello React!</title> |
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<script src="bower_components/react/react.js"></script> |
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<script src="bower_components/react/react-dom.js"></script> |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js"></script> |
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</head> |
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<body> |
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<div id="example"></div> |
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<script type="text/babel"> |
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ReactDOM.render( |
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<h1>Hello, world!</h1>, |
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document.getElementById('example') |
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); |
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</script> |
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</body> |
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</html> |
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``` |
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## Using master |
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We have instructions for building from `master` [in our GitHub repository](https://github.com/facebook/react). |
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