Reference files for the live-coding demos, in teaching order. Open any example and use View Source (right-click → View Page Source) to read the code — then rebuild it yourself.
▶ Open the Interactive SlidesReading, writing, and managing files
Building HTTP servers from scratch
URL parsing and request routing
Serving HTML, CSS, JS files
Tip: don't copy-paste. Type the code yourself, break it on purpose, then fix it. Use DevTools (F12) to inspect what's happening.