Creating Asynchronous HTTP Requests in JavaScript

Since synchronous requests block the calling process until their result is received, only asynchronous HTTP requests should be used when building a web application. However, asynchronous code can be tricky to write and to understand, since statements won’t be executed in a linear and sequential fashion like with synchronous operations.

The fetch() method

The best way to send asynchronous HTTP requests in JavaScript is to use the fetch() method. Here is its general usage form.