Callbacks, Promises, Async Await - JavaScript Fetch API Explained

Intro
What is a callback function?
What is the problem with callbacks?
JavaScript Promises have 3 states
A promise may not return a value where you expect it to: You need to wait for a promise to resolve
Using thenables with a promise
An easy mistake to make with promises
Creating an async function
Applying await inside the function
Example 1: Retrieving user data
Example 2: Retrieving dad jokes
Example 3: Posting data
Example 4: Retrieving data with URL parameters
Abstract it all into single responsibility functions