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.

Step 1. Add the async keyword to our function. Adding the async keyword makes a function asynchronous. This allows us to use the await operator in the function body:. let getUserProfile = async ...

The JavaScript method, Array.map(f) is a pure function in that it takes a function as a parameter. That last point about pure functions warrants further exploration. First-order functions vs. pure ...