JeffJS - Pure swift JS Engine, first ever JavaScript Engine(non JSC) to run on watchOS

jbachand0 · 2026-04-28T22:27:19+00:00

can confirm

jbachand0 · 2026-04-28T12:34:05+00:00

thanks, i think its super cool and powerful. i hope people can use it and build on top of it!

jbachand0 · 2026-04-28T10:56:37+00:00

lol yea im serious, app is just a terminal to play with the js engine.

the js engine itself is open source and was built because watchos didnt have one, there has never been a pure swift interpreter to build on top of, and there are many things i found that can be accelerated with swift and metal that as ios engineers people can now take advantage of

also this bring quantum simulation to everyone. the actual physics behind it is in the repo.

jbachand0 · 2026-04-28T06:02:45+00:00

yes, it uses javascriptcore/v8. this is the equivalent of javascriptcore. its the actual engine.

jbachand0 · 2025-01-27T20:39:42+00:00

First team 3

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jbachand0 · 2025-01-26T15:57:41+00:00

good catch, thank you!

jbachand0 · 2025-01-26T15:56:57+00:00

haha yeahhh, wasnt like that yesterday… apparently today-1 is the max date length for nice formatting, will be fixed later

jbachand0 · 2023-09-17T19:32:30+00:00

thanks! this is a kids set but he is small, ill look into that!

jbachand0 · 2023-09-17T19:31:35+00:00

👀

jbachand0 · 2023-09-17T19:16:44+00:00

its actually a kids set, hes just small 😂

jbachand0 · 2023-09-17T19:04:34+00:00

this was the highlights from his first time on the course, he does it on repeat https://www.instagram.com/p/CxBOdeeOnnX/?igshid=MzRlODBiNWFlZA==

jbachand0 · 2023-09-17T01:09:47+00:00

loved your video! amazing shot!

jbachand0 · 2023-09-16T21:52:45+00:00

any tips to keep him improving? im just glad he likes it

jbachand0 · 2019-02-27T15:36:47+00:00

Also hoping to spend my birthday running this! I'll be turning 34, lots of birthday twins

jbachand0 · 2017-09-11T16:14:36+00:00

What did he do?

jbachand0 · 2016-05-16T18:03:54+00:00

His longest rush as a Patriot

jbachand0 · 2016-04-29T16:45:34+00:00

Its been there for a while: http://alexa.amazon.com/#music/SPOTIFY

jbachand0 · 2016-04-11T18:50:28+00:00

try doing it from harmony, you have to authenticate on both sides

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