What do you understand by JSX? Explain it.
Example: var h1 = <h1>Hello, World!</h1>
Examples of JSX elements with the attributes:
<a href="http://www.yahoo.com">Welcome to the Yahoo</a>;
var title = <h1 id="title">Introduction to React.js: Part I</h1>;
An example of a nested JSX expression being saved as a variable:
var theFacebook = (
*If a JSX expression takes up more than one line, then you should wrap the multi-line JSX expression in parentheses.