AJAX

We have already touched upon the topic of making AJAX requests. There are many ways to make AJAX requests; the two most common approaches are:

• Using the fetch API; the fetch API is a web standard and is thus built into most browsers
• Using the ajax() method, nowadays built into the RxJS library; it used to exist in a library called Rx.Dom

fetch()

The fetch() API is a web standard. You can find the official documentation at the following link: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API. The fetch() API is Promise-based, which means we need to convert it to an Observable before use. The API exposes a fetch() method, which takes a mandatory URL parameter as the first argument, with the second argument being...