ALWAYS Put the Record ID in the Edit FormUsers might have multiple pages of your app open in different tabs or windows. Use a page-specific ID, not something shared like a cookie or session data.
Auto-Switching a Website to Dark ModeYou can easily tell your site to use darker colors when a visitor is using a dark theme by using CSS media queries.
Google Toolbar AutoFill is WeirdThis form had name and e-mail fields, but AutoFill only recognized e-mail. I figured, OK, people might be using this, let's see if I can adjust the page and make it compatible.
Pure CSS ButtonsAs part of a minor site optimizing kick, I replaced the validation labels with something smaller, less obtrusive, and directly on the page. I tried to duplicate the look of the classic antipixel-style buttons in CSS.
Readable Email and Web PagesIt's 2024. If you're still designing websites or email like you would design an 8.5x11" promotional hand-out on a sheet of paper, you really haven't been paying attention to how people use the internet over the past decade.