Introduction to asynchronous JavaScript

Hmm. An article in 2016 about async javascript without any references to async/await?

Also, using promises to make code look prettier is kind of missing the point, and can be achieved with callbacks too. The real reasons to use promises are:

1. Error handling/bubbling

2. No chance of 'double callbacks'

3. Value-oriented code

4. Easier composition of async tasks

5. Ease of migration to async/await