Cheng LouandConnor McSheffrey
48f1ee4940
- No need to mention React, you know you're working with it =). - Wrap code elements in back ticks, so that they get the "box" styling for md. - You'd want the snippet to work inside the live editor, so you need to `renderComponent`. As per wiki specification, the DOM element on which to mount is `mountNode`, just like on the front page. - Don't forget the JSX pragma, or else your `render` fails. - Nitpick: empty line after the end of md. - No need for jQuery reference since 1. The general mood around React is that you don't need jQuery. 2. The syntax' still clear without jQuery. 3. We're doing a jQuery integration entry =). - `getInitialState` was absent. - You don't need `componentWillMount` here. fetch them in `getInitialState`. - The non-spoken convention seems to call the event handler `"handle" + eventName`. So `handleResize` clearly indicates it's a `resize` handler while `updateDimensions` might do something else. This latter name might actually be better under circumstances where you use call the method directly somewhere, but since we removed the only direct usage in `componentWillMount` this is fine. - Went OCD again and tried to keep the code short. `width` is enough of a demo. Removed `height`. - Distinguish between DOM events and React events. Wish we go full React events in a near future.
React 
React is a JavaScript library for building user interfaces.
- Declarative: React uses a declarative paradigm that makes it easier to reason about your application.
- Efficient: React computes the minimal set of changes necessary to keep your DOM up-to-date.
- Flexible: React works with the libraries and frameworks that you already know.
Learn how to use React in your own project.
Examples
We have several examples on the website. Here is the first one to get you started:
/** @jsx React.DOM */
var HelloMessage = React.createClass({
render: function() {
return <div>{'Hello ' + this.props.name}</div>;
}
});
React.renderComponent(
<HelloMessage name="John" />,
document.getElementById('container')
);
This example will render "Hello John" into a container on the page.
You'll notice that we used an XML-like syntax; we call it JSX. JSX is not required to use React, but it makes code more readable, and writing it feels like writing HTML. A simple transform is included with React that allows converting JSX into native JavaScript for browsers to digest.
Installation
The fastest way to get started is to serve JavaScript from the CDN (also available on CDNJS):
<!-- The core React library -->
<script src="http://fb.me/react-0.5.0.js"></script>
<!-- In-browser JSX transformer, remove when pre-compiling JSX. -->
<script src="http://fb.me/JSXTransformer-0.5.0.js"></script>
We've also built a starter kit which might be useful if this is your first time using React. It includes a webpage with an example of using React with live code.
If you'd like to use bower, it's as easy as:
bower install --save react
Contribute
The main purpose of this repository is to continue to evolve React core, making it faster and easier to use. If you're interested in helping with that, then keep reading. If you're not interested in helping right now that's ok too :) Any feedback you have about using React would be greatly appreciated.
Building Your Copy of React
The process to build react.js is built entirely on top of node.js, using many libraries you may already be familiar with.
Prerequisites
- You have
nodeinstalled at v0.10.0+ (it might work at lower versions, we just haven't tested). - You are familiar with
npmand know whether or not you need to usesudowhen installing packages globally. - You are familiar with
git.
Build
Once you have the repository cloned, building a copy of react.js is really easy.
# grunt-cli is needed by grunt; you might have this installed already
npm install -g grunt-cli
npm install
grunt build
At this point, you should now have a build/ directory populated with everything you need to use React. The examples should all work.
Grunt
We use grunt to automate many tasks. Run grunt -h to see a mostly complete listing. The important ones to know:
# Create test build & run tests with PhantomJS
grunt test
# Lint the core library code with JSHint
grunt lint
# Lint package code
grunt lint:package
# Wipe out build directory
grunt clean
More…
There's only so much we can cram in here. To read more about the community and guidelines for submitting pull requests, please read the Contributing document.