This looks like Gilad Bracha's Newspeak: https://en.wikipedia.org/wiki/Newspeak_(programming_language...

Objective-Smalltalk with Interscript. https://objective.st

It ain't a version of Squeak, though.

SmallJS (https://small-js.org) does what you want mostly. In the sense that a standalone desktop app can be made with NW.js.

For the HTML/JS side see https://amber-lang.net but not updated for a few years