"It works on my machine" is what an unfinished website looks like. The finished version has been QAed on three breakpoints, two browsers, one mobile keyboard, and at least one slow connection.
The checklist
- Every form submits and delivers to the right inbox.
- Every CTA goes where you expect.
- Every redirect is one hop, not three.
- GA4 fires on page load and on conversion events.
- Search Console knows the new sitemap.
- Mobile keyboard does not break the contact form layout.
- Password managers can autofill the login.
- The site loads on a throttled 3G connection without total despair.
I have a Notion template with the full list. Every project, every launch.