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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
The idea is to have some examples that show Espruino serving up a nice-looking UI - not to provide a toolkit as such, and not using someone else's service.
The SVG approach seems to work really well, and the SVG and JS can be compressed a lot so the tutorial above is serving up a page that's under 3k.
I think a widget suite as such is probably a bit counterproductive (for an actual polished, finished product you probably want something heavily customised anyway). It'd be interesting to provide some space-optimised JS code that automatically searched for SVG elements with certain classes (scrollbar,guage,etc) and made them interactive though.