ReactDOMServer.renderToString string renderToString(ReactElement element)

shallowCompare is a helper function to achieve the same functionality as PureRenderMixin while using ES6 classes with React. If

ReactTestUtils makes it easy to test React components in the testing framework of your choice (we use

ReactDOM.unmountComponentAtNode boolean unmountComponentAtNode(DOMElement container)

React is usually quite fast out of the box. However, in situations where you need to squeeze every ounce of performance out of your app, it provides a shouldComponentUpdate

This isn't really a React-specific tip, as such anti-patterns often occur in code in general; in this case, React simply points them out more clearly.

isMounted boolean isMounted() isMounted()

Here's how false renders in different situations: Renders as id="false":

Beside DOM differences, React offers some attributes that simply don't exist in DOM.

React.PropTypes React.PropTypes includes types that can be used with a component's propTypes object to validate props