The basic code structure To build the app we’re using p5.js library, which is a JavaScript library designed for working mainly with canvas, and that fits perfectly for our use case.

PayPal reveals that writing server-side software in node.js rather than Java is allowing it to serve web pages more rapidly and simplifying web development.

Developers use JavaScript promises to model asynchronous operations in web and server-side programs. Here's a quick look at five ways to use promises in your code.