ReactDOMServer.renderToString string renderToString(ReactElement element) Render a ReactElement to its initial HTML. This should only be used on the server. React will return an HTML string. You can use this method to generate HTML on the server and send the markup down on the initial request for faster page loads and to allow search engines to crawl your pages for SEO purposes. If you call ReactDOM.render() on a node that already has this server-rendered markup, React will preserve it and on

Updating: componentWillUpdate void componentWillUpdate( object nextProps, object nextState ) Invoked immediately before rendering when new props or state are being received. This method is not called for the initial render. Use this as an opportunity to perform preparation before an update occurs. You cannot use this.setState() in this method. If you need to update state in response to a prop change, use componentWillReceiveProps instead.

One of React's biggest strengths is that it's easy to track the flow of data through your React components. When you look at a component, you can easily see exactly which props are being passed in which makes your apps easy to reason about. Occasionally, you want to pass data through the component tree without having to pass the props down manually at every level. React's "context" feature lets you do this. Context is an advanced and experimental feature. The API is likely to change in future

getDOMNode DOMElement getDOMNode() If this component has been mounted into the DOM, this returns the corresponding native browser DOM element. This method is useful for reading values out of the DOM, such as form field values and performing DOM measurements. When render returns null or false, this.getDOMNode() returns null. getDOMNode is deprecated and has been replaced with ReactDOM.findDOMNode(). This method is not available on ES6 class components that extend React.Component. It may be r

React React is the entry point to the React library. If you're using one of the prebuilt packages it's available as a global; if you're using CommonJS modules you can require() it. React.Component class Component This is the base class for React Components when they're defined using ES6 classes. See Reusable Components for how to use ES6 classes with React. For what methods are actually provided by the base class, see the Component API. React.createClass ReactClass createClass(object spe

React.createFactory factoryFunction createFactory( string/ReactClass type ) Return a function that produces ReactElements of a given type. Like React.createElement, the type argument can be either an html tag name string (eg. 'div', 'span', etc), or a ReactClass.

React.Component class Component This is the base class for React Components when they're defined using ES6 classes. See Reusable Components for how to use ES6 classes with React. For what methods are actually provided by the base class, see the Component API.

Form components such as <input>, <textarea>, and <option> differ from other native components because they can be mutated via user interactions. These components provide interfaces that make it easier to manage forms in response to user interactions. For information on events on <form> see Form Events. Interactive Props Form components support a few props that are affected via user interactions: value, supported by <input> and <textarea> components. check

mixins array mixins The mixins array allows you to use mixins to share behavior among multiple components. For more information about mixins, see Reusable Components.

ReactTestUtils makes it easy to test React components in the testing framework of your choice (we use Jest). var ReactTestUtils = require('react-addons-test-utils'); Airbnb has released a testing utility called Enzyme, which makes it easy to assert, manipulate, and traverse your React Components' output. If you're deciding on a unit testing library, it's worth checking out: http://airbnb.io/enzyme/ Simulate Simulate.{eventName}( DOMElement element, [object eventData] ) Simulate an ev