Ashley Claymore @ashley-c.bsky.social · 11/08/2026Just added Composites* for Stage 2 to the next TC39 agenda. github.com/tc39/proposa... Slides: docs.google.com/presentation... PR: github.com/tc39/agendas... *API name placeholdergithub.comGitHub - tc39/proposal-compositesContribute to tc39/proposal-composites development by creating an account on GitHub. 2507
Ashley Claymore @ashley-c.bsky.social · 05/07/2026I've been experimenting with having `ts-blank-space` use the (unstable) TypeScript-go JS API. At first it was ~60% slower than using the TS 6 API, but with a bit of investigation, a bug fix, and a small refactor to use different API calls it is now ~24% faster! Draft PR: github.com/bloomberg/ts... 2445
Reposted by Ashley ClaymoreJohn Reilly @johnnyreilly.com · 03/07/2026A lovely dawn with @ashley-c.bsky.social 081
Ashley Claymore @ashley-c.bsky.social · 26/03/2026@ryansolid.bsky.social would it make sense for memos created without an owner scope to default to lazy? Closer to how preact-signals only link if there is an active effect. Maybe only useful when solid signals are used on their own, which is maybe not an important use case for the package? 130
Ashley Claymore @ashley-c.bsky.social · 17/03/2026Sudden panic at seeing an email saying my order for the Font Family was being processed. I didn't buy any fonts 😦 the sans-serif family is good enough for me. Then remembered the climbing wall I went to earlier was called The Font 😮💨 0101
Ashley Claymore @ashley-c.bsky.social · 06/03/2026One use case for the new `JSON.parse` source API: adding custom handling for floating point rounding (e.g. error or switch to BigInt): proposal: github.com/tc39/proposa... mdn: developer.mozilla.org/en-US/docs/W... 1172
Ashley Claymore @ashley-c.bsky.social · 01/03/2026If anyone needs a silly, not portable, zero dependency, one liner TypeScript build script that can only handle a single file. Look no further! 2190
Ashley Claymore @ashley-c.bsky.social · 18/02/2026@ryansolid.bsky.social was there a stream where you covered the solid 2.0 createStore ideas? You talked about it briefly in the more recent stream and it sounded very interesting - only diffing store changes when there is a known listener (I think thats what I heard). Thanks! 200
Ashley Claymore @ashley-c.bsky.social · 28/01/2026Witnessed all 5 stages within one context window: - denial "but I've already built the code" - anger "nothing here suggests an error" - bargaining "I could delete the test" - depression "thank you for your patience while we work through this" - acceptance "you're absolutely right" 020
Ashley Claymore @ashley-c.bsky.social · 05/01/20263 years in a row I posted about Temporal on Jan 1st. Now the year has come* I of course forgot. * Not stage 4 yet, but all signs point to this year and Temporal has shipped in Firefox and coming in Chrome 144. 3296
Ashley Claymore @ashley-c.bsky.social · 07/11/2025Slides done for one of my two upcoming tc39 agenda items. Composites comparator choice: docs.google.com/presentation... (Yet to be finalised) agenda here: github.com/tc39/agendas...docs.google.comComposite November 2025Composites' Comparator Choice For discussion 1131
Reposted by Ashley ClaymoreJohn Reilly @johnnyreilly.com · 28/10/2025Lovely walk into the office with @ashley-c.bsky.social 🌅 031
Ashley Claymore @ashley-c.bsky.social · 26/10/2025Great to get that hour back that we loaned out back in March but can't shake the feeling that should have charged interest 020
Ashley Claymore @ashley-c.bsky.social · 11/10/2025. @viteconf.org was the first in-person conference I've been to and it set the bar high! Excellent talks and really welcoming atmosphere. Amsterdam is a fantastic city. Thanks to everyone for the geeky JS chats. 2322
Ashley Claymore @ashley-c.bsky.social · 31/08/2025If I add `npm run build` to the auto-approve list and it has edit access to package.json - have I auto approved everything? 010
Ashley Claymore @ashley-c.bsky.social · 31/07/2025I've found chatting with LLMs very useful. But have had to turn off inline suggestions. Too much time spent reading the suggestion, only to reject it because it's not what I'm trying to do. If I've only typed two characters, that is not enough to read my mind. 010
Ashley Claymore @ashley-c.bsky.social · 08/07/2025Expandable hovers 😍 Know these have been in the works for a while and I'm so excited to try them out. devblogs.microsoft.com/typescript/a...devblogs.microsoft.comAnnouncing TypeScript 5.9 Beta - TypeScriptToday we are excited to announce the availability of TypeScript 5.9 Beta. To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta Let’s tak... 032
Ashley Claymore @ashley-c.bsky.social · 06/07/2025Capturing for posterity: I asked ChatGPT "When do you think there will be a best selling novel written entirely by AI?" A: "You might see a fully AI-authored book in the Amazon Top 100 by the late 2020s, and a New York Times best-seller by early 2030s." 130
Ashley Claymore @ashley-c.bsky.social · 22/06/2025First trip to NY! 80/20% nervous/excited. Watch films or try and code without a copilot on the flight? 480
Ashley Claymore @ashley-c.bsky.social · 18/06/2025I'm sure I read somewhere that there was a plan to add a new React hook for getting a representation of the current component stack to help with debugging/error reporting. But I can't find it anywhere. Did I dream this? cc: @en-js.bsky.social @no.lol 100
Ashley Claymore @ashley-c.bsky.social · 16/06/2025Back from a week hiding in Wales 🏴. Mostly enjoying the countryside, steam trains, and castles. Did do a little bit of c++ for the first time in years, having a go at implementing something in v8. I had not missed preprocessor header includes and macros. JS has made me soft. 010
Ashley Claymore @ashley-c.bsky.social · 12/06/2025How long until all the seo companies transition to aio? chatgpt.com/share/684b29... 010
Ashley Claymore @ashley-c.bsky.social · 02/06/2025TIL assert.partialDeepStrictEqual( [1, 2, 3, 4, 5, 6, 7, 8, 9], [4, 5, 8], ); My gut guess would have been that only common prefix would pass. I can see how this is also useful, just surprised me. nodejs.org/api/assert.h... 030
Ashley Claymore @ashley-c.bsky.social · 29/05/2025What if the JSX transform was: (x) => <elm prop1={1} prop2={x} />; to const _staticProps = { prop1: 1 }; (x) => jsx("elm", { __proto__: _staticProps, prop2: x }); i.e the contract is that the props on the prototype never change so don't need to be diffed. 130
Reposted by Ashley ClaymoreJohn Reilly @johnnyreilly.com · 20/05/2025Myself and @ashley-c.bsky.social wrote a post on the TypeScript Go port (originally published on LogRocket). If you'd like to read it, it's here: johnnyreilly.com/typescript-g...johnnyreilly.comTypeScript is going Go: Why it’s the pragmatic choice | johnnyreillyTypeScript is being ported to Go. This is a reflection on the port, and what it means for the TypeScript ecosystem. 062
Reposted by Ashley ClaymoreJohn Reilly @johnnyreilly.com · 10/05/2025Great explanation of the journey from Records and Tuples to Composites and why they are useful by @mattpocock.com and TC39er @ashley-c.bsky.social youtu.be/hFenspfGLTk?...youtu.beArrays, objects... now ‘composites’?YouTube video by Matt Pocock 2203
Reposted by Ashley ClaymoreRob Palmer @robpalmer.bsky.social · 10/05/2025ECMAScript explanations 😉 @mattpocock.com and proposal champion @ashley-c.bsky.social explain why TC39 Stage 2 Record & Tuple has been withdraw and replaced with the new Stage 1 Composites proposal 👍 Contains discussion of performance expectations and constraints. youtu.be/hFenspfGLTkyoutu.beArrays, objects... now ‘composites’?YouTube video by Matt Pocock 0213
Ashley Claymore @ashley-c.bsky.social · 07/05/2025YIRL* that in V8 even empty functions hold the context they were created in. Had misremembered that part of mrale.ph/blog/2012/09... * yesterday I relearnedmrale.ph Grokking V8 closures for fun (and profit?) 172
Reposted by Ashley ClaymoreJohn Reilly @johnnyreilly.com · 17/04/2025@ashley-c.bsky.social and I have written a @logrocket.bsky.social post on our take on the TypeScript Go port. Many thanks to @joshuakgoldberg.com and @jakebailey.dev for their very useful input ❤️ blog.logrocket.com/typescript-g...blog.logrocket.comTypeScript is going Go: Why it's the pragmatic choice - LogRocket BlogExplore why the TypeScript team is porting the compiler to Go in TypeScript 7. Learn how this shift impacts performance, tooling, and the future of the TypeScript ecosystem. 0127
Reposted by Ashley ClaymoreRob Palmer @robpalmer.bsky.social · 14/04/2025ECMAScript excitement 😉 Congrats to @ashley-c.bsky.social on advancing the Composites proposal to Stage 1 at TC39 today 🎉 This is the evolution of Stage 2 Record & Tuple which has now been withdrawn. A key difference is that Composites are objects, not primitives. github.com/tc39/proposa...github.comGitHub - tc39/proposal-compositesContribute to tc39/proposal-composites development by creating an account on GitHub. 46511
Ashley Claymore @ashley-c.bsky.social · 11/03/2025Fantastic interview. Great questions and lots of information. I'm so pleased such high quality content was available right after the announcement. 1212
Ashley Claymore @ashley-c.bsky.social · 07/03/2025A CLI was taking a while to exit, the awesome www.npmjs.com/package/why-... to the rescue. Found some code using this pattern: ``` await Promise.race([someRequest, setTimeoutPromise(15_000)]); ``` Even though the outer promise resolves, the timer promise keeps the process alive.npmjs.comwhy-is-node-runningNode is running but you don't know why? why-is-node-running is here to help you.. Latest version: 3.2.2, last published: 2 months ago. Start using why-is-node-running in your project by running `npm i... 130
Reposted by Ashley ClaymoreJason Williams @jason-williams.co.uk · 24/01/2025Myself and @pcwilliams.net continue to be humbled by the response we had at @perfnow.bsky.social. Our talk “Bloomberg Becomes Browser” has been published! You can watch it here: youtu.be/y1MCLZm8yAY?...youtu.beBloomberg Becomes Browser | Jason Williams & Paul Williams | performance.now() 2024YouTube video by Web Conferences Amsterdam 2187
Ashley Claymore @ashley-c.bsky.social · 16/01/2025Most wanted: a way to improve IDE JSON schema error messages 000
Reposted by Ashley ClaymoreJake Archibald @jakearchibald.com · 02/01/2025Oh god no. It was shit like this that made it clear we needed something like the extensible web manifesto. It's a high level DB type, which needed a promise-like thing, but they created something bespoke for this one API. It's the antithesis of the extensible web. 2111
Ashley Claymore @ashley-c.bsky.social · 27/12/2024Nodejs running .ts files directly is useful even for projects that still retain a build step because those build scripts can more easily be written in TypeScript. Win win. 1504
Ashley Claymore @ashley-c.bsky.social · 29/11/2024My talk on ts-blank-space is now online (35min) www.youtube.com/watch?v=ZiD5...youtube.comLondon TypeScript Community Meetup (11/02/24): Faster TypeScript CompilationYouTube video by Inside Bloomberg 33511
Ashley Claymore @ashley-c.bsky.social · 05/11/2024Writing a small interactive CLI dev tool at work. Starting to feel that the logic would be much cleaner as a state machine. Either this is true or this just sounds like a fun way to express it. Only one way to find out! 030
Ashley Claymore @ashley-c.bsky.social · 26/10/2024Heading to a board game cafe. Can't take our own. Any recommendations for things to look out for on the shelves? 100
Ashley Claymore @ashley-c.bsky.social · 23/10/2024Was caught thing to parse XML with a single regex. It was just so fast that I couldn't resist. Thankfully www.npmjs.com/package/saxo... was only a smidge slower and has a great name 000
Reposted by Ashley ClaymoreMichael Molisani @molisani.bsky.social · 01/10/2024I will be in London tomorrow at our #TypeScript community meetup to talk about Building Better CLI Apps (with Stricli). There are also two other amazing talks after mine so come out for an interesting evening! Sign up for free here: go.bloomberg.com/attend/invit...go.bloomberg.comLondon TypeScript Community Meetup 022
Reposted by Ashley ClaymoreMichael Molisani @molisani.bsky.social · 26/09/2024And I'm one of the other talks! Sign up, it's definitely going to be an exciting and informative time. 011
Ashley Claymore @ashley-c.bsky.social · 26/09/2024📣 London TypeScript meet-up next week. I'm one of the three talks (eek!) Sign up here: go.bloomberg.com/attend/invit...go.bloomberg.comLondon TypeScript Community Meetup 111
Ashley Claymore @ashley-c.bsky.social · 19/09/2024Today, I'm releasing a TypeScript compiler called ts-blank-space 🎈 We use this at Bloomberg to perform type-stripping on a modern subset of TypeScript. It's written in TypeScript and is fast because it uses whitespace to enable work-skipping. bloomberg.github.io/ts-blank-spacebloomberg.github.iots-blank-spaceA small, fast, pure JavaScript type-stripper that uses the official TypeScript parser. 45113
Ashley Claymore @ashley-c.bsky.social · 16/08/2024@searyanc.dev > Who is this for? > - Ideological purists There are dozens of us! Dozens! 020
