React Life Cycle Methods - Reference

Lifecycle Methods

componentWillMount – Invoked once, on both client & server before rendering occurs.
componentDidMount – Invoked once, only on the client, after rendering occurs.
shouldComponentUpdate – Return value determines whether component should update.
componentWillUnmount – Invoked prior to unmounting component.
Specs

getInitialState – Return value is the initial value for state.
getDefaultProps – Sets fallback props values if props aren’t supplied.
mixins – An array of objects, used to extend the current component’s functionality.