Creator of @fullcalendar_io and temporal-polyfill (npmjs.com/package/temporal-p…)
Westchester, NY
- Tweets 36
- Following 201
- Followers 136
- Likes 936
Had a real tough time with LLMs installing defunct FullCalendar v6 plugins alongside v7, erroring, then downgrading all to v6 (bad! I want ppl on v7!). Solutions:
• DeepSeek V4.1 Flash - Nudged by hints in pkgs' READMEs and package.json
• Sonnet 5.5 - A deliberate TS type error whose message says how to fix it
• Opus 5.5 - No nudging necessary. Installed v7 fine as-is.
• Sol 6.1 - Installed v6 almost every time, could not be nudged :(
I'd say we're 75% fine, but I'll still mention in docs that explicit prompting about v7 is recommended.
1
39
Some new 👏 new 👏 new 👏 stuff for FullCalendar I'm very proud of! And more coming this quarter.
Finally a @fullcalendar_io handle after only 17 years in existence LOL
67
Btw, this is what was blocking FullCalendar v7, available now 🎉. More info to come...
temporal-polyfill 🕒 1.0 is out! Smaller and with a tree-shakeable API that can be codemodded away. Great for component lib authors: tiny footprint now, zero footprint later, and shared internals with the host app's polyfill (if they choose to install it).
1
5
246
temporal-polyfill 🕒 1.0 is out! Smaller and with a tree-shakeable API that can be codemodded away. Great for component lib authors: tiny footprint now, zero footprint later, and shared internals with the host app's polyfill (if they choose to install it).
1
6
17
1,818
Also in 1.0: compliant with the latest Temporal spec, plus the everyday helpers it omits — startOfMonth, diffDays, roundToWeek — both in the tree-shakeable API and a companion temporal-utils package. Learn how it all fits together:
github.com/fullcalendar/temp…
3
260
Temporal is finally here, "8 yrs, 11 mos" in the making! Congrats @therealptomato and and the champions! Humbled to be invited to the @TC39 meeting where it moved to Stage 4. During my work on temporal-polyfill, I collaborated with the champions to improve datetime arithmetics and duration rounding.
2
23
1,611
Adam Shaw retweeted
Temporal is now Stage 4 at TC39 🎂🎂🎂
Thanks to all the other champions of JavaScript's new date-time API. It has been a wild ride over many years!
I wrote a blog post explaining how we got here 📜
🧵
![Source Text showing Temporal.ZonedDateTime usage:
```
// London DST starts: 2026-03-29 01:00 -> 02:00
const zdt = Temporal.ZonedDateTime.from(
"2026-03-29T00:30:00+00:00[Europe/London]",
);
console.log(zdt.toString());
// → "2026-03-29T00:30:00+00:00[Europe/London]"
const plus1h = zdt.add({ hours: 1 });
console.log(plus1h.toString());
// "2026-03-29T02:30:00+01:00[Europe/London]" (01:30 doesn't exist)
```](/pic/orig/media%2FHDI3_BKXUAA7pd0.jpg)
ALT Source Text showing Temporal.ZonedDateTime usage: ``` // London DST starts: 2026-03-29 01:00 -> 02:00 const zdt = Temporal.ZonedDateTime.from( "2026-03-29T00:30:00+00:00[Europe/London]", ); console.log(zdt.toString()); // → "2026-03-29T00:30:00+00:00[Europe/London]" const plus1h = zdt.add({ hours: 1 }); console.log(plus1h.toString()); // "2026-03-29T02:30:00+01:00[Europe/London]" (01:30 doesn't exist) ```
16
119
581
184,927
temporal-polyfill: 1M weekly downloads on NPM 🎉
Long overdue for a new release — I've been focused on FullCalendar v7, but I'm queuing one up this week.
137
Adam Shaw retweeted
Do you sit at a computer for longer than 6 hours a day?
You’re destroying your body if so.
Here’s the setup you need to protect yourself from posture problems and crippling long-term injuries:
🧵
1,300
30,152
132,378
Adam Shaw retweeted
📦🍣 Pkgroll is a zero-config package bundler that auto-infers configuration from package.json and bundles with Rollup and esbuild
Great for TypeScript + ESM libraries that want to support ESM, CommonJS, & .d.ts!
⚡️ Try it out: `npx pkgroll`
github.com/privatenumber/pkg…
2
1
22
How to Exclude node_modules from Dropbox or Google Drive arshaw.com/exclude-node-modu…
1