React Elements - Hello World

hello_world.jsx

// This uses JSX syntax.
var helloWorld = <div>Hello World!</div>;

// And this is what the JSX syntax compiles into in JavaScript:
var helloWorld = React.createElement(
  "div",
  null,
  "Hello World!"
);

// And this produces a plain old JavaScript object that looks something like this:
var helloWorld = {
    key: null,
    props: {
        children: "Hello World!" // more stuff in here
    },
    ref: null,
    type: "div"
    // more stuff in here
};