React and ES6 - Part 2, React Classes and ES7 Property Initializers

This is the second post of series in which we are going to explore the usage of React with ECMAScript6. You could find links to all parts of series below: React and ES6 - Part 1, Introduction into ES6 and React React and ES6 - React and ES6 - Part 2, React Classes and ES7 Property Initializers React and ES6 - Part 3, Binding to methods of React class (ES7 included) React and ES6 - Part 4, React Mi