Human, React dev, JS tooling fan, occasional speaker, probably an imposter. frehner.me He/Him. Working at @shopify
Joined November 2012
- Tweets 968
- Following 397
- Followers 627
- Likes 5,971
16 Photos and videos
Pinned Tweet
21 May 2025
Shopify Polaris is now built on web components. My team and I have been working on this for a while and it's been a lot of fun to "embrace the platform"!
shopify.dev/beta/next-gen-de…
Lots of things learned, lots of fun edge cases discovered
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Anthony Frehner 🐽 retweeted
10 Sep 2025
🚀 New Polaris web components are here!
ColorField, ColorPicker, Popover, Tooltip, Menu, Chip, ClickableChip & DropZone
shopify.dev/changelog/new-co…
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Anthony Frehner 🐽 retweeted
28 May 2025
Import maps and JavaScript modules are important web platform primitives for performance benefits 🐎 but not reliable at scale. So we fixed it! 🎉
Learn how in this post by @yoavweiss
shopify.engineering/resilien…
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Anthony Frehner 🐽 retweeted
21 May 2025
Headline: "Polaris—unified and for the web"
The work:
- Align components across multiple teams w focus on web
- Extremely light "in-house" framework
- Automatic updates for Apps
- Maintain or exceed UX quality
- Docs, templates, CLI
- AI, MCP
- "Polaris"
So much more to come
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21 May 2025
Shopify Polaris is now built on web components. My team and I have been working on this for a while and it's been a lot of fun to "embrace the platform"!
shopify.dev/beta/next-gen-de…
Lots of things learned, lots of fun edge cases discovered
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901
21 May 2025
And I've been a part of Shopify's Technical Alignment Group (TAG) for a couple of months, which has been a great privilege and learning experience.
We want to make sure that you can use the same props across all areas of Shopify; admin, checkout, etc.
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10 Jul 2024
I finally wrote something again - how to compose the new tc39-approved decorators! I hope it's useful to someone out there when you want to have multiple decorators on a single class/property/etc.😊
dev.to/frehner/composing-jav…
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25 Jul 2024
Turns out this is all a lie. I'm working on updating it haha
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27 Jun 2024
Is it even possible to define in Typescript an abstract function overload?
In other words, pretend you’re writing a types-only package. One of the types you provide is a function signature that has overloads.
Someone else must actually implement the function.
Impossible? 😫
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4 Feb 2024
The "Grounded 2" documentary was great. Worth a watch if you've played TLOU2, and also if you don't plan on playing it. Lots of parallels to project management, development, expectations, crunch, etc.,
And watching Ashley Johnson and Laura Bailey act and cry and... ugh.
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1 May 2023
.@AndaristRake Putting in a huge effort to fix some TypeScript and package exports issues over the weekend.
Something like ~40 PRs, all to different libraries, to help fix some mis-configuration. 😍
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11 Apr 2023
To further solidify that I don't know what I'm doing, I'm now cloning engine262
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12 Apr 2023
Yo dawg, I’m writing a JavaScript engine in JavaScript so I can run JavaScript while running JavaScript.
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29 Mar 2023
Studying react-reconciler and some of the custom JS-based reconcilers out there (react-three-fiber, ink, pixi-react)
No idea what I'll do with this info. Probably nothing. But it's been fun to learn it
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31 Aug 2022
The Modern Guide to Packaging Your JavaScript Library is here!
⌨️ ~3,000 words
💁21 sections
✅ Peer reviewed
ℹ️ 26 citations
👐Bundler agnostic
But most importantly (to me), it's open source with the goal of keeping it up-to-date as time goes on.
github.com/frehner/modern-gu…
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28 Mar 2023
Added a new section for tooling. It currently includes great tools from
@bluwyoo - publint.dev
And
@atcb - arethetypeswrong
github.com/frehner/modern-gu…
Let me know if there are other great tools for validating JS packaging needs!
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