From the chromium forum: "Intent to Implement: Toast UI element" https://groups.google.com/a/chromium.org/forum/m/#!msg/blink...
>Firefox: No public signals >Edge: No public signals >Safari: No public signals >Web developers: Positive (previously expressed privately; we've encouraged them to make their interest public on the WICG thread) So basically, nobody at Google talked to anyone about this, asked only google engineers and then pushed those mentioned google engineers to make postive comments in the standards thread? And none of the other…
The standardization process will undoubtedly change the shape of the thing altogether, or it could not even make it into the HTML spec.