This is the article you need to read to get the point of Async Generators and why you should be using them. This article is about state management but it contains a lot more really useful information about asynchronous programming with generators.

https://link.medium.com/lGpe7lbczT

Doing templates from first principles without a framework, just plain old JS and HTML

https://github.com/matthewp/templates-the-hard-way/blob/master/readme.md