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.

Here’s a JavaScript function with no type annotations; it’s a way to generate a person’s name in a last-name-first format, based on some object with .firstName and .lastName properties.

The javascript file contains a method addToViewer (theUrl), I need to get the variable 'url' from the servlet into this method.