└── server.js If you’re not familiar with JSX syntax, it is a JavaScript language extension meant for React component encoding with XML so that template files can include JavaScript.

Love it or loathe it, JSX has made a big impact on front-end engineering. Here's a code-first intro to the HTML-based JavaScript templating language.

The React and Vue.js JavaScript libraries share some of the best ideas in web development. Which should you choose?