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This came up for Val Town - we implemented code folding in our default editor which uses CodeMirror, but wanted it to work with JSX elements, not just functions and control flow statements. It’s not enough to justify a module of its own because CodeMirror’s API is unbelievably well-designed: import { tsxLanguage, } from "@codemirror/lang-javascript"; import { foldInside, foldNodeProp, } from "@codemirror/language"; /** tsxLanguage, with code folding for jsx elements */ tsxLanguage.configure({ props: [ foldNodeProp.add({ JSXElement: foldInside, }), ], }) Then you can plug that into a LanguageSupport instance and use it. Amazing.
a year ago

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More from macwright.com

Introducing the blogroll

This website has a new section: blogroll.opml! A blogroll is a list of blogs - a lightweight way of people recommending other people’s writing on the indieweb. What it includes The blogs that I included are just sampled from my many RSS subscriptions that I keep in my Feedbin reader. I’m subscribed to about 200 RSS feeds, the majority of which are dead or only publish once a year. I like that about blogs, that there’s no expectation of getting a post out every single day, like there is in more algorithmically-driven media. If someone who I interacted with on the internet years ago decides to restart their writing, that’s great! There’s no reason to prune all the quiet feeds. The picks are oriented toward what I’m into: niches, blogs that have a loose topic but don’t try to be general-interest, people with distinctive writing. If you import all of the feeds into your RSS reader, you’ll probably end up unsubscribing from some of them because some of the experimental electric guitar design or bonsai news is not what you’re into. Seems fine, or you’ll discover a new interest! How it works Ruben Schade figured out a brilliant way to show blogrolls and I copied him. Check out his post on styling OPML and RSS with XSLT to XHTML for how it works. My only additions to that scheme were making the blogroll page blend into the rest of the website by using an include tag with Jekyll to add the basic site skeleton, and adding a link with the download attribute to provide a simple way to download the OPML file. Oddly, if you try to save the OPML page using Save as… in Firefox, Firefox will save the transformed output via the XSLT, rather than the raw source code. XSLT is such an odd and rare part of the web ecosystem, I had to use it.

6 days ago 6 votes
Recently

I have a non-recently post ready to write, any day now… Reading This was a strong month for reading: I finished The Hidden Wealth of Nations, Useful Not True, and Cyberlibertarianism. I had a book club that read Cyberlibertarianism so we discussed it last week. I have a lot of qualms with the book, and gave it two stars for that reason. But I will admit that it’s taking up space in my mind. The ‘cyberlibertarian’ ideology was familiar to me before reading it. The book’s critique of it didn’t shift my thinking that much. But I have been thinking a lot about what it argued for, which is a world in which the government has very extensive powers – to limit what is said online, to regulate which companies can even create forums or social media platforms. He also believed that a government should be able to decrypt and read conversations between private citizens. It’s a very different idea of government power than what I’m used to, and well outside my comfort zone. I think it’s interesting to consider these things: the government probably should have some control of some kinds of speech, and in some cases it’s useful to have the FBI tapping the phones of drug smugglers or terrorists. How do we really define what’s acceptable and what isn’t? I don’t know, I want to do more thinking about the uncomfortable things that nevertheless may be necessary for functioning of society. Besides that, there is so much to read. This month I added a lot of news subscriptions to my pile, which I think is now Hell Gate, Wired, NYTimes, Bloomberg, 404 Media, The Verge, and a bunch of newsletters. This interview with Stephanie Kelton, who is at the forefront of the Modern Monetary Theory movement in America, and wrote the very good book The Deficit Myth. This 404 Media story on an AI-generated ‘true crime’ YouTube channel is great because the team at 404 Media does both deep research and they interrogate their sources. Nathan Tankus has always been good but in this era he’s essential reading. His piece on Fort Knox is quick and snappy. His others are more involved but always worth reading. Listening We’ve been rewatching The Bear and admiring the dad-rock soundtrack. This Nine Inch Nails track shows up at the end of a season: And this Eno track: Besides that, this track from Smino played at a local cocktail bar. The bars at 0:45 sound like they’re tumbling downhill in a delightful way. Watching So I bought a sewing machine in February, a beautiful old Kenmore 158-series, produced in the 1970s in Japan. It’s awesome. How sewing machines work is amazing, as this video lays out. There’s so much coordinated motion happening for every stitch, and the machines are so well-designed that they last for decades easily. Besides that, I just watched The Apprentice, which I really did not like. Elsewhere I was on a podcast with Jeremy Jung, taking about Placemark! My post in the /micro/ section, All Hat No Cowboy, probably could have or should have been a blog post, but I was feeling skittish about being too anti-AI on the main.

a week ago 8 votes
Recently

I am not going to repeat the news. But man, things are really, really bad and getting worse in America. It’s all so unendingly stupid and evil. The tech industry is being horrible, too. Wishing strength to the people who are much more exposed to the chaos than I am. Reading A Confederacy of Dunces was such a perfect novel. It was pure escapism, over-the-top comedy, and such an unusual artifact, that was sadly only appreciated posthumously. Very earnestly I believe that despite greater access to power and resources, the box labeled “socially acceptable ways to be a man” is much smaller than the box labeled “socially acceptable ways to be a woman.” This article on the distinction between patriarchy and men was an interesting read. With the whole… politics out there, it’s easy to go off the rails with any discussion about men and women and whether either have it easy or hard. The same author wrote this good article about declining male enrollment in college. I think both are worth a read. Whenever I read this kind of article, I’m reminded of how limited and mostly fortunate my own experience is. There’s a big difference, I think, in how vigorously you have to perform your gender in some red state where everyone owns a pickup truck, versus a major city where the roles are a little more fluid. Plus, I’ve been extremely fortunate to have a lot of friends and genuine open conversations about feelings with other men. I wish that was the norm! On Having a Maximum Wealth was right up my alley. I’m reading another one of the new-French-economist books right now, and am still fascinated by the prospect of wealth taxes. My friend David has started a local newsletter for Richmond, Virginia, and written a good piece about public surveillance. Construction Physics is consistently great, and their investigation of why skyscrapers are all glass boxes is no exception. Watching David Lynch was so great. We watched his film Lost Highway a few days after he passed, and it was even better than I had remembered it. Norm Macdonald’s extremely long jokes on late-night talk shows have been getting me through the days. Listening This song by the The Hard Quartet – a supergroup of Emmett Kelly, Stephen Malkmus (Pavement), Matt Sweeney and Jim White. It’s such a loving, tender bit of nonsense, very golden-age Pavement. They also have this nice chill song: I came across this SML album via Hearing Things, which has been highlighting a lot of good music. Small Medium Large by SML It’s a pretty good time for these independent high-quality art websites. Colossal has done the same for the art world and highlights good new art: I really want to make it out to see the Nick Cave (not the musician) art show while it’s in New York.

a month ago 15 votes
2025 Predictions

I was just enjoying Simon Willison’s predictions and, heck, why not. 1: The web becomes adversarial to AI The history of search engines is sort of an arms race between websites and search engines. Back in the early 2000s, juicing your ranking on search engines was pretty easy - you could put a bunch of junk in your meta description tags or put some text with lots of keywords on each page and make that text really tiny and transparent so users didn’t notice it but Google did. I doubt that Perplexity’s userbase is that big but Perplexity users are probably a lot wealthier on average than Google’s, and there’s some edge to be achieved by getting Perplexity to rank your content highly or recommend your website. I’ve already noticed some search results including links to content farms. There are handful of startups that do this already, but the prediction is: the average marketing exec at a consumer brand will put some of their budget to work on fooling AI. That means serving different content to AI scrapers, maybe using some twist on Glaze and other forms of adversarial image processing to make their marketing images more tantalizing to the bots. Websites will be increasingly aware that they’re being consumed by AI, and they will have a vested interest in messing with the way AI ‘perceives’ them. As Simon notes in his predictions, AIs are gullible: and that’s before there are widespread efforts to fool them. There’s probably some way to detect an AI scraper, give it a special payload, and trick it into recommending your brand of razors whenever anyone asks, and once someone figures it out this will be the marketing trend of the decade. 2: Copyright nihilism breeds a return to physical-only media The latest lawsuit about Meta’s use of pirated books, allegedly with Mark Zuckerberg’s explicit permission, if true, will be another reason to lose faith in the American legal system’s intellectual property system entirely. We’ve only seen it used to punish individuals and protect corporations, regardless of the facts and damages, and there’s no reason to believe it will do anything different (POSIWID). The result, besides an uptick in nihilism, could be a rejuvenation of physical-only releases. New albums only released on vinyl. Books only available in paperback format. More private screenings of hip movies. When all digital records are part of the ‘training dataset,’ a niche, hipster subset will be drawn to things that aren’t as easily captured and reproduced. This is parallel, to the state of closed-source models from Anthropic or OpenAI. They’re never distributed or run locally. They exist as bytes on some hard drive and in some massive GPU’s memory in some datacenter, and there aren’t Bittorrents pirating them because they’re kept away from people, not because of the power of copyright law. What can be accessed can be copied, so secrecy and inaccessibility is valuable. 3: American tech companies will pull out of Europe because they want to do acquisitions The incoming political administration will probably bring an end to Lina Khan’s era of the FTC, and era in which the FTC did stuff. We will go back to a ‘hands off’ policy in which big companies will acquire each other pretty often without much government interference. But, even in Khan’s era, the real nail in the coffin for one of the biggest acquisitions - Adobe’s attempt to buy Figma – was regulators from the EU and UK. Those regulators will probably keep doing stuff, so I think it’s likely that the next time some company wants to acquire a close competitor, they just close up shop in the EU, maybe with a long-term plan to return. 4: The tech industry’s ‘DEI backlash’ will run up against reality The reality is that the gap between women and men in terms of college degrees is really big: “Today, 47% of U.S. women ages 25 to 34 have a bachelor’s degree, compared with 37% of men.” And that a great deal of the tech industry’s workforce is made of up highly-skilled people who are on H-1B visas. The synthesis will be that tech workers will be more diverse, in some respects, but by stripping away the bare-bones protections around their presence, companies will keep them in a more vulnerable and exploitable position. But hard right-wingers will have plenty to complain about because these companies will continue to look less white and male, because the labor pool is not that. 5: Local-first will have a breakthrough moment I think that Zero Sync has a good chance at cracking this really hard problem. So does electric and maybe jazz, too. The gap between the dream of local-first apps and the reality has been wide, but I think projects are starting to come to grips with a few hard truths: Full decentralization is not worth it. You need to design for syncing a subset of the data, not the entire dataset. You need an approach to schema evolution and permission checking These systems are getting there. We could see a big, Figma-level application built on Zero this year that will set the standard for future web application architecture. 6: Local, small AI models will be a big deal Embedding models are cool as heck. New text-to-speech and speech-to-text models are dramatically better than what came before. Image segmentation is getting a lot better. There’s a lot of stuff that is coming out of this boom that will be able to scale down to a small model that runs on a phone, browser, or at least on our own web servers without having to call out to OpenAI or Anthropic APIs. It’ll make sense for costs, performance, and security. Candle is a really interesting effort in this area. Mini predictions Substack will re-bundle news. People are tired of subscribing to individual newsletters. Substack will introduce some ~$20/month plan that gives you access to all of the newsletters that participate in this new pricing model. TypeScript gets a zeitwork equivalent and lots of people use it. Same as how prettier brought full code formatting from TypeScript, autoloading is the kind of thing that once you have it, it’s magic. What if you could just write <SomeComponent /> in your React app and didn’t have to import it? I think this would be extremely addictive and catch on fast. Node.js will fend off its competitors. Even though Val Town is built around Deno’s magic, I’ve been very impressed that Node.js is keeping up. They’ve introduced permissions, just like Deno, and native TypeScript support, just like the upstarts. Bun and Deno will keep gaining adherents, but Node.js has a long future ahead of it. Another US city starts seriously considering congestion pricing. For all the chatter and terrible discourse around the plan, it is obviously a good idea and it will work, as it has in every other case, and inspire other cities to do the same. Stripe will IPO. They’re still killing it, but they’re killing it in an established, repeatable way that public markets will like, and will let up the pressure on the many, many people who own their stock.

2 months ago 42 votes
Recently 2024

Happy end-of-2024! It’s been a pretty good year overall. I’m thankful. There’s no way that I’ll be able to remember and carve out the time around New Years to write this, so here’s some end-of-year roundup, ahead of schedule! Running This was my biggest year for running on record: 687 miles as of today. I think the biggest difference with this year was just that nothing stood in the way of my being pretty consistent and putting in the miles: the weather has been mild, I haven’t had any major injuries, and long runs have felt pretty good. I was happy to hit a half-marathon PR (1:36:21), but my performance in 5Ks was far short of the goal of sub-20 – partly because Brooklyn’s wonderful 5K series was run at the peak of summer, with multiple races at over 85°F. I learned the value of good lightweight running gear: Bakline’s singlets and Goodr sunglasses were super helpful in getting me through the summer. Work Val Town raised a seed round and hired a bunch of excellent people. We moved into a new office of our own, which has a great vibe. It’s been good: we’re doing a lot of ground-up work wrangling cgroups and low-level worker scheduling, and a lot of UX-in work, just trying to make it a pleasant tool. Frankly, with every product I’ve worked on, I’ve never had a feeling that it was good enough, and accordingly, for me, Val Town feels like it has a long way to go. It’s probably a good tendency to be sort of unsatisfied and motivated to constantly improve. New York It’s still such a wonderful place to live. Late this year, I’ve been rediscovering my obsession with cycling, and realizing how much I whiffed the opportunity to ride more when I lived in San Francisco. I guess that’s the first time I felt genuinely nostalgic for the West coast. I miss DC a bit too: it’s one of the few cities where my friends have been able to stay in the city proper while raising children, and I miss the accessible, underdog punk scene. But Brooklyn is just a remarkable place to live. My walk score is 100. The degree to which people here are in the city because they want to be, not because they have to, shapes so much of what makes it great. Other ‘metrics’ Relative to my old level obsession about self-quantification, my ‘metrics’ are pretty moderate now. Everything’s just backward-looking: I’m not paying much attention to the numbers as I go, it’s just fun to look at them year-over-year trends. That said, this was a lackluster year for reading: just 18 books so far. I think I just read an above-average number of books that I didn’t enjoy very much. Next year I’m going to return to authors who I already love, and stay away from genres that – the data shows – I don’t like. Whereas this was a banner year for watching movies: not great! Next year, I want to flip these results. Of everything I saw, Kinds of Kindness will probably stick with me the most. Placemark It seems like a decade ago that I released Placemark as open source software, as developing it as a closed-source SaaS application for a few years. But I did that in January. There have been a few great open source contributions since then, but it’s pretty quiet. Which is okay, somewhat expected: there is no hidden crowd of people with extra time on their hands and unending enthusiasm for ‘geospatial software’ waiting to contribute to that kind of project. Placemark is also, even with my obsessive focus on simplicity, a pretty complicated codebase. The learning curve is probably pretty significant. Maps are a challenging problem area: that’s what attracts a lot of people to them, but people who use maps persistently have the feeling that it couldn’t be that complicated, which means that few users convert into contributors. There are a few prominent efforts chasing similar goals as Placemark: Atlas.co is aiming to be an all-in-one editing/analysis platform, Felt a cloud-native GIS platform, and then there are plenty of indiehackers-style projects. I hope these projects take off! Figma plugins I also kept maintaining the Figma plugins I developed under the Placemark name. Potentially a lot of people are using them, but I don’t really know. The problem with filling in water shapes in the plugins is still unsolved: it’s pretty hard and I haven’t had the time or motivation to fix it. The most energy into those plugins this year, unfortunately, was when someone noticed that the dataset I was using - Natural Earth – marked Crimea as part of Russia. Which obviously: I don’t draw the countries in datasets, but it’s a reasonable thing to point out (but to assume that the author is malicious was a real downer, again, like, I don’t draw the countries). This decision from Natural Earth’s maintainer is heavily discussed and they aren’t planning on changing it, so I switched to world-atlas, which doesn’t have that problem. Which was fine, but a reminder of the days when I worked on maps full-time and this kind of unexpected “you’re the baddie” realization came up much more often. Sometimes it was silly: people who complain about label priority in the sense of “why, at zoom level 3, does one country’s name show up and not anothers?” was just silly. The answer, ahem, was that there isn’t enough space for the two labels and one country had a higher population or a geometry that gave their label more distance from the other country’s centroid. But a lot of the territorial disputes are part of people’s long cultural, political, military history and the source of intergenerational strife. Of course that’s serious stuff. Making a tool that shows a globe with labels on it will probably always trigger some sort of moment like that, and it’s a reason to not work on it that much because you’re bound to unintentionally step on something contentious. Other projects I released Obsidian Freeform, and have been using it a bit myself. Obsidian has really stuck for me. My vault is well over 2,000 notes, and I’ve created a daily note for almost every day for the last year. Freeform was a fun project and I have other ideas that are Obsidian plugin-shaped, though I’ve become a little bit let down by the plugin API - the fact that Obsidian-flavored-Markdown is nonstandard and the parser/AST is not accessible to plugins is a pretty big drawback for the kinds of things I want to build. Elsewhere recently I’ve been writing a bit: Recently I’ve written about dependency bloat and a developer analytics tool we built at Val Town, and started writing some supplementary documentation for Observable Plot about parts of its API that I think are unintuitive. On the micro blog, I wrote about not using GitHub Copilot and how brands should make a comeback. This blog got a gentle redesign in May, to show multiple categories of posts on the home page, and then in August I did a mass update to switch all YouTube embeds to lite-youtube-embed to make pages load faster. I’m still running Jekyll, like I have been for the last decade, and it works great. Oh, and I’ve basically stopped using Twitter and am only on Mastodon and Bluesky. Bluesky more than Mastodon recently because it seems like it’s doing a better job at attracting a more diverse community. I’m looking forward to 2025, to cycling a lot more and a new phase of startup-building. See you in the new year.

2 months ago 70 votes

More in programming

New Blog Post: "A Perplexing Javascript Parsing Puzzle"

I know I said we'd be back to normal newsletters this week and in fact had 80% of one already written. Then I unearthed something that was better left buried. Blog post here, Patreon notes here (Mostly an explanation of how I found this horror in the first place). Next week I'll send what was supposed to be this week's piece. (PS: April Cools in three weeks!)

17 hours ago 3 votes
Notes on Improving Churn

Ask any B2C SaaS founder what metric they’d like to improve and most will say reducing churn. However, proactively reducing churn is a difficult task. I’ll outline the approach we’ve taken at Jenni AI to go from ~17% to 9% churn over the past year. We are still a work in progress but hopefully you’ll […] The post Notes on Improving Churn appeared first on Marc Astbury.

20 hours ago 3 votes
Catching grace

Meditation is easy when you know what to do: absolutely nothing! It's hard at first, like trying to look at the back of your own head, but there's a knack to it.

17 hours ago 3 votes
Python Performance: Why 'if not list' is 2x Faster Than Using len()

Discover why 'if not mylist' is twice as fast as 'len(mylist) == 0' by examining CPython's VM instructions and object memory access patterns.

12 hours ago 3 votes
Our switch to Kamal is complete

In a fit of frustration, I wrote the first version of Kamal in six weeks at the start of 2023. Our plan to get out of the cloud was getting bogged down in enterprisey pricing and Kubernetes complexity. And I refused to accept that running our own hardware had to be that expensive or that convoluted. So I got busy building a cheap and simple alternative.  Now, just two years later, Kamal is deploying every single application in our entire heritage fleet, and everything in active development. Finalizing a perfectly uniform mode of deployment for every web app we've built over the past two decades and still maintain. See, we have this obsession at 37signals: That the modern build-boost-discard cycle of internet applications is a scourge. That users ought to be able to trust that when they adopt a system like Basecamp or HEY, they don't have to fear eviction from the next executive re-org. We call this obsession Until The End Of The Internet. That obsession isn't free, but it's worth it. It means we're still operating the very first version of Basecamp for thousands of paying customers. That's the OG code base from 2003! Which hasn't seen any updates since 2010, beyond security patches, bug fixes, and performance improvements. But we're still operating it, and, along with every other app in our heritage collection, deploying it with Kamal. That just makes me smile, knowing that we have customers who adopted Basecamp in 2004, and are still able to use the same system some twenty years later. In the meantime, we've relaunched and dramatically improved Basecamp many times since. But for customers happy with what they have, there's no forced migration to the latest version. I very much had all of this in mind when designing Kamal. That's one of the reasons I really love Docker. It allows you to encapsulate an entire system, with all of its dependencies, and run it until the end of time. Kind of how modern gaming emulators can run the original ROM of Pac-Man or Pong to perfection and eternity. Kamal seeks to be but a simple wrapper and workflow around this wondrous simplicity. Complexity is but a bridge — and a fragile one at that. To build something durable, you have to make it simple.

23 hours ago 2 votes