Events (1/5)
How do we handle events in react.
    Handling events with React elements is very similar to handling events on DOM elements.
    There are some syntax differences:
    • React events are named using camelCase, rather than lowercase.
    • With JSX you pass a function as the event handler, rather than a string.
    • Another difference is that you cannot return false to prevent default behavior in React. You must call preventDefault explicitly.