If you’re looking for a technical roundup of what’s new in Safari 15, head over to the WebKit blog
With the release of Safari 15 for macOS Monterey, iPadOS 15, iOS 15, and watchOS, as well as macOS Big Sur and macOS Catalina, WebKit brings significant advancements in privacy and security, improved interoperability, and a host of new features for web developers. Take a look.
Very glad to see aspect-ratio and WebGL2 now being available in all modern browsers.
On the JS-side of things, top level await is a very welcome addition.
UX-wise autocomplete=one-time-code on <input> will save users a lot of time.