Read the URL. Half the bugs are in the address bar.
Every part of the address bar has a job. Read one and you can debug half of the "why isn't it loading" problems on sight.
Vibe edition
The 6 parts (protocol, host, port, path, query, hash) and what each does. Key fact: the #hash never goes to the server. Every port you'll meet (3000, 5173, 5432…). Special URLs (localhost, data:, blob:, mailto:, ws:). Debug checklist for URL-related fails.
What's on it
7 sections covering parts of a URL, host anatomy, port list, query strings, special URLs, URL debugging, and 9 URL jargon terms translated (absolute/relative, slug, canonical, deep link, permalink, redirect, URI vs URL, scheme, fragment).
The details
18" × 24" matte giclée print, 300 DPI. Dark theme.
Part of the quux Vibe poster series. quux.shop