We've tried to make React as environment-agnostic as possible. People use React in a variety of languages (JavaScript, TypeScript, ClojureScript, etc) and in a variety of environments

Mounting: componentDidMount void componentDidMount() Invoked

React.createClass ReactClass createClass(object specification)

Usually, a component's children (this.props.children) is an array of components: var

The React add-ons are a collection of useful utility modules for building React apps. These should be considered experimental and tend to change more often

Note: cloneWithProps is deprecated. Use React.cloneElement instead. In rare situations, you may want

render ReactElement render() The render()

ReactLink is an easy way to express two-way binding with React. ReactLink is deprecated as of React v15. The recommendation

We'll be building a simple but realistic comments box that you can drop into a blog, a basic version of the realtime comments offered by Disqus, LiveFyre or Facebook comments

In most cases, you can use the key prop to specify keys on the elements you're returning from render. However, this breaks down in one situation: