This lesson is an introduction to making web applications. A little HTML and CSS are covered as base-level knowledge, but the focus should be on the Document Object Model (DOM) and JavaScript.
The actual lesson contents are in contents.md.
Part of the lesson is a demo app that reads contents.md and makes a slide presentation (found here). This app is left in an intentionally poorly designed state to demonstrate concepts like scoping. Comments are littered throughout for a novice reader.
To view the demo, either run a web server in this directory (e.g. python -m http.server) or view the latest version at https://jladan.github.io/webdev-basics.