react.js

https://www.safaribooksonline.com/library/view/reactjs-fundamentals-and/9780134688671/

https://www.safaribooksonline.com/library/view/advanced-reactjs-livelessons/9780134676920/

getInitialState() will make it available as this.state

multiple apps in one page

return inside render is same as createElement

return () pattern is required since in the parenthesis you don't have to worry about multiple lines
promise in ES6 - reject/resolve will tie to catch/then

lifecycle methods - componentDidMount componentWillMount componentDidUnMount

higher order component - not clear

propTypes - good for types/validation

performance improvement => shouldComponentUpdate/add key to siblings