Almost everything on the web is one machine politely asking another machine for a thing.
How the Web Actually Works
Follow one click from your finger all the way to the pixels.
Before you can reason about a bug, you need a mental movie of what happens when someone visits your app. This course builds that movie once, slowly, so every other course has somewhere to hang.
Start the first lesson0/4 lessons read
By the end you can
- Describe out loud what happens between a click and a rendered page
- Know which machine is doing the work at each step
- Guess correctly where a problem lives before you start looking
Lessons
Why a domain name is a lookup, why HTTPS matters, and why the first visit is always slower.
HTML, CSS and JavaScript are not competitors. Knowing which one owns a problem saves hours.
Four different kinds of slow, and how to tell which one you have before you optimise the wrong thing.