Field notes
Clear explanations for everyday web work.
Short, practical references designed to sit beside the tools.
WEB GUIDE
Understanding URL anatomy
A practical tour of protocol, hostname, port, path, query parameters, and fragments.
DATA GUIDEA practical guide to JSON
How JSON is structured, why validation fails, and how to keep data readable.
BROWSER GUIDEBrowser storage explained
When to use localStorage and sessionStorage, how persistence works, and what to avoid.
TIME GUIDEWorking with Unix timestamps
How computers represent moments in time and how to convert values safely.