@_ojkwon Profile picture

OJ Kwon

@_ojkwon

Coffe in, bug out

Joined April 2015
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👏🏻 to @rspack_dev team for the work to support seamless webpack migration + performance boost. Launched dev beta for the internal app with rapack 1.1 and HMR gots more than 2x faster at minimum. (If anyone asks why no Turbopack, this isn't next.js app)


Dust off swc-plugin-coverage-instrument (npmjs.com/package/swc-pl…), published a new version. This pkg prpvides instanbuljs-compatible coverage with @swc_rs . The latest version have a new `unstableExclude` option to allow glob pattern to exclude certain file from instrumentation.


Published a new version of woodpile (npmjs.com/package/woodpi…), @swc_rs ast visitor in javascript. Fixed ast mutation, now `visit` returns mutated ast as js object.


Wrapping up my journey at Vercel and trying to go back to writing some more Typescript-y things. Still love Rust and hope to get back to some SWC work too.


Got the port of VS code's Blanché to @zeddotdev , if anyone want to minimal monochrome editor experience: gist.github.com/kwonoj/96abc7f…

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In the mood of side project but afraid of not able to build working poc until long weekend


Having a reliable, isolated repro to bug report is one of the greatest way to help OSS maintainer for the OSS you use / like. Also, it'll help you as well as maintainers are likely can pick up the issue easier / faster.


Today's mood

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This is the first time I tried to use node.js's built in test runner, not a bad out of the box experience. I'd use other runners still for the complicated setups, but for the small things this would be useful. Not able to use @wallabyjs is one bad thing.

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OJ Kwon Reposted

Folks... this is a BIG DEAL. Things to know: 1. This is NOT "adding RxJS to the browser". There's a limited but solid set of functionality here. Not operator hell. 2. Adding observables to the platform means that many, many frameworks and libraries can leverage them instead of…

Hey reactive JS folks! I'm working to bring Observables to the web platform by reviving a @thedomstandard proposal that got some attention a while ago. @BenLesh and I would love your feedback, so check out github.com/domfarolino/ob… if you want to do things like this soon:

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OJ Kwon Reposted

Added few small updates to woodpile: - adds `visitWithPath` , passes parent node types paths array to the callback - initial typescript definition allows to list all visit_* callbacks for the node types. npmjs.com/package/woodpi…

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Turbopack gets @swc_rs wasm plugin support: github.com/vercel/next.js… This took longer than I expected and some small glitches, but core features are working.

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A proof of concept demo plugin for @swc_rs that compile-time evaluates some codes: github.com/kwonoj/swc-plu… turns "const x = preeval`1+1`;" to "const x = 2;", backed by @boa_engine . This is nowhere close to prod though - a dirty demo swc plugin can potentially embed js engine.


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