Plastron is a spreadsheet starting with one cel (元) whose formula generates the a readme DOM element but you can make sheets of cels with formulas like =cels(8, 5). It s a single index.html — no build, no server, no install — so it runs locally, offline, and free. Excel is maybe the most useful software ever written, but the moment a sheet wants to be a real app — a UI, a file, a database, something to share — you fall off a cliff and rewrite it as a real application (framework + backend + deploy), usually after pleading with IT over licenses. Meanwhile every browser already runs JS, WASM, SQLite, and a filesystem API. An index.html should be all you need.Things to try on the page: =cels( anim , 2, 1, at( a1 , =def(\ ball\ , \ js\ , \ i = [30+280Math.abs((i/20)%2-1), 30+200Math.abs((i/14)%2-1)]\ ) ), at( a2 , =simulate(\ ball\ , 120) ))=cels( data , 2, 1, at( a1 , =db(\ app\ ) ), at( a2 , =sql(\ app\ , \ create table t(a,b); insert into t values (1,2),(3,4); select * from t\ ) ))Imagine somebody dm ing you a formula for some bs b2b saas appIt s early and meant to be built on. I m sure there are bugs. No version control yet, no .xlsx import/export, and the traditional Excel formula set isn t there.Code (MIT): https://github.com/rheophile10/plastronalso you can still play free doom at this vestigial stub https://plastron.ca/os/I benched plastron against krausests library https://news.ycombinator.com/item?id=45259345 and you can see the first pass version of plastron therehttps://github.com/krausest/js-framework-benchmark/pull/2015This afternoon I PR d the more recent plastron. It has some modest improvements https://github.com/krausest/js-framework-benchmark/pull/2029Thanks @1v100000 @mynamebedan @lionkimbro for ill-advised encouragementThanks to @Ki_fun_thoughts for entertaining conversations about what thought bubbles of spiderman would look like in a more perfect worldThanks to Claude and Grok who laboured with this prompt: make me spreadsheet... masterpiece Thank you for reading this. Now give me cruel and harsh criticism in the comments. Or steal this app and do what I was trying to do better than I could.https://www.instagram.com/reel/DRFytotD2hV/?hl=en@Ki_fun_thoughts wiki: https://www.tinygnomes.com/qwiki.cgi?mode=previewSynd uuid=W...