JavaScript: Weekly Summary (September 22-28, 2025)

This week in JavaScript felt a bit like tapping the brakes at the right corners. Not stopping. Just slowing down to keep the car steady. I would describe the mood as careful and practical. Folks focused on control. When to run code, when not to. Which tools to invite into the house, which to keep at the door. And how to shape the browser into a fair place for humans when bots crowd the queue. It’s not flashy, but it’s the kind of week that actually makes projects nicer to live with.

Guardrails and gentle brakes

To me, it feels like the big thread weaving through these posts is restraint. Not less JavaScript, exactly. More like smarter JavaScript. A soft discipline. Do just enough. Don’t do it everywhere. Focus on the business and leave the theater lighting at home unless it helps the reader. I’d say it’s the difference between seasoning your stew and dumping in the entire spice rack.

There’s also a second thread humming under the first: we’re turning the browser and our tools into zones with rules. Filters that keep templates clean. Scripts that don’t fire on pages where they only cause trouble. Dependency choices that admit trade‑offs, not fairy tales. Even one approach that makes bots sweat a little before touching content. Not cruel, just balanced. Like a bouncer who checks IDs but still smiles.

A snippet that knows when to stay quiet

On 09/22, Unlisted Retrograde Holdout shared a small fix with a big attitude: a simple JavaScript snippet to avoid running specific code on selected pages. The story behind it is very human. There was a preloader script that tried to emulate a CRT monitor vibe. Cute idea. But on cameraphone benchmark comparison pages, that same preloader messed with image rendering. It got in the way. So the author pulled out the unnecessary CRT effect and added a small guard to keep certain code from executing on certain routes.

I’d describe it as one of those tiny protective fences that stops you falling into a ditch you already fell into last week. You don’t need a giant framework for this. Just a little logic that says, hey, not here, buddy. And honestly, it reads like a quick household fix. You know when the bathroom fan is wired to the wrong switch and you live with it way too long. Then one day you just swap the wire and suddenly you can take a shower without waking the whole house.

The quiet hero is the idea of not running code on pages where it harms the user experience. It’s almost boring. But the good kind of boring. The kind that doesn’t throw errors at 2 a.m. when you’re trying to test a layout. It’s also a subtle nudge toward performance. No need to animate pretend scanlines if people came for sharp photos and honest numbers.

If that little vibe interests you, check the author’s page. There’s more texture there. And probably the exact snippet, if you want to borrow the shape of it.

The buy‑versus‑build talk, but for dependencies

On 09/24, Gianluca Arbezzano took a tour across career stages and how they change the view on dependencies. I’d say the arc is familiar. As a junior, dependencies felt like a risk. You want to keep it pure. Write it yourself. Then, a bit later, you realize time is money, and you grab packages that save a week. Ship ship ship. Then you become more senior, and the lens widens. Now you see how every dependency adds complexity, adds unknowns, adds a bit of a timer you don’t fully control.

The post references both Golang and JavaScript, which is a nice contrast. In JavaScript land, the dependency tree can grow like ivy. It’s helpful until it crawls over your window. In Go, it’s tighter, but the choice still bites. The main idea is not “never add deps” and not “just npm install everything,” but something calmer. Consider. Estimate. Look at how it fits the project, the team, the future. Map the trade‑offs.

There’s a manufacturing analogy in there, which makes sense. Reusability sounds good, until you find you swapped a small handmade part for a subassembly you don’t understand, built three countries away, with a shipping schedule that slips when there’s fog in the channel. To me, it feels like he’s saying: buy components, but not blindly. Build things, but not from pride. Avoid moralizing the choice. Make it boringly practical.

If you’ve been stuck between “just use the library” and “let’s write our own,” this one gives language for the middle path. Not pushy. Just firm. It’s the kind of piece you hand to a teammate before a planning meeting and it saves the next hour.

Tools that talk back: conversational MCP and coding assistants

Also on 09/24, thisContext wrote about MCP, the Model Context Protocol, with a slant I’d call a little futuristic and a little hands‑on. The idea is that you can extend a language model’s skills by associating local functions with natural‑language descriptions. Tools become discoverable through conversation. That’s the trick. You don’t just wire a tool; you describe its shape to the model. The model can then reach for it, as long as the environment is set.

The post gets into the anatomy of an MCP tool. It mentions there are requirements on the protocol side and on the environment side. I’d say that’s important. Tools are not floating; they live somewhere, with permissions, with data. The author also describes a proxy server that sits between the client and the tool. That’s interesting, because these layers are where reliability shows up. You want the assistant to feel smooth, but under the hood, there’s scaffolding that must be correct.

What makes this relevant to JavaScript folks is not just the buzz around AI. It’s the pattern. Think of it like adding a plugin to your editor, except the editor is a chat window, and the plugin is a function that can read a repo, hit an API, or write a file. You can imagine hooking into coding environments in real time. The author hints at conversational tool development, which sounds like building CLI‑like skills in a tight loop. The shape reminds me of how we wire Eleventy filters or Express middleware, but with a different control surface. Words instead of imports.

If you want examples and a clearer sense of how tools are registered, the author’s page seems like it has more concrete steps. I liked the sense that you can start scrappy, with a simple tool, and then fold in more as trust builds.

Filters in Eleventy: tidy drawers for template tricks

On 09/25, Juha‑Matti Santala got into Eleventy filters. If you’ve used Eleventy before, you know the vibe. Filters transform data in templates. A tiny function there, a tiny function here. Soon you have ten. Then fifteen. And they’re scattered.

The post walks through creating and organizing filters so they live in one place, as a collection of utilities. I’d describe it as the “drawer dividers” of Eleventy. Not glamorous, but deeply satisfying. The author encourages keeping a tidy set of helpers for better project management, which hits the same restraint note as earlier posts. Save the thinking for the content, not for trying to find where the date formatting went.

There’s also a spirit of invitation. The author says, hey, let’s discuss. That matters. Filters often hide behind the scenes. You add one for a URL slug, one for a pluralization, one for trimming whitespace. Then it becomes project glue, and nobody can remember which file owns what. This post nudges you to be intentional. Name them. Group them. Share patterns with the team.

If you want explicit examples, or you’re building a new Eleventy site from scratch, the details on their page will help you move quicker. It’s the sort of write‑up that saves future you from refactoring late at night.

Bots at the gate: Anubis, proof‑of‑work, and headless browsers

Two posts from Michał Sapka landed later in the week, on 09/25 and 09/27. Funny thing: one is titled like a personal story, “My son’s first computer game,” and the other nods to Star Trek: Voyager, but the summaries point at the same subject: Anubis, a protective measure against aggressive scraping by AI companies.

The mechanism used is Proof‑of‑Work. Make scraping more expensive. Not impossible, just harder. Like putting a small incline on a bike path. Humans can pedal up without thinking. A fleet of scooters might slow. The post also mentions the need to identify headless browsers to improve the user experience. That’s an important note. If you raise the friction, you still want legitimate visitors, including readers on older devices or privacy setups, to feel welcome. Identifying headless browsers is one way to tell if something is likely non‑human or not.

There’s a vibe here of fairness. Not an anti‑bot panic. More like setting expectations. If you’re going to vacuum up the content, do a little work. Pay a small compute tax. It’s not perfect, and it won’t stop a determined actor, but it shifts the cost curve. Sometimes that’s enough.

From a JavaScript angle, I’d say the interesting part is how the browser becomes a gatekeeper. You can run a Proof‑of‑Work puzzle within the visit, tune it so it’s not punishing, and watch for signals that suggest automation. Headless detection is a messy art because there’s a long tail of browsers and modes. But the theme is clear: apply friction carefully, keep the experience fair.

I liked the culture blending here. The Star Trek title made me think of the Borg and collective behavior—many units acting as one. Feels like a polite jab at scraping swarms. It’s cheeky, but it fits. And the “first computer game” title is a kind of wink too. Proof‑of‑Work really is a small game. Solve a tiny puzzle, then proceed. Feels almost nostalgic, like those early flash games where you clicked a bee 20 times to unlock a sticker.

If the idea of a browser doing micro‑challenges for access makes you curious, the author’s pages seem to go deeper. The practical pieces are there, and probably some trade‑offs explained.

A small thread that ties the week

If I stitch these posts together, I’d say this week sounded like: run less code, but run it smarter. Control the surface. Filter the mess. Be mindful when you add dependencies. Give your tools a way to talk to you, not just sit in your node_modules like silent guests. And when the wider web misbehaves, shape the path so good visitors move easily and the rest get tired.

The restraint shows up in different clothes. The Eleventy filters keep template logic tidy. The camera‑page bug fix removes a fun but unneeded flourisher. The dependency essay cuts through ego and habit. The MCP piece threads utility into conversation, which is a kind of controlled affordance—it opens power only when asked. And the Anubis idea adds a measured hassle to anything that isn’t clearly human.

I’d compare it to cleaning the garage at the end of summer. You don’t build a new garage. You don’t burn it down either. You throw out the bent folding chair. You hang the rake on a hook. You label the box of camping gear. Now you can actually find the flashlight when the storm hits.

Patterns I’d pocket for the next sprint

• Make scripts situational. If a piece of code is for a very specific effect, don’t let it run everywhere. A small “not on these pages” rule can save you later.
• Treat filters like a library you own. Collect them. Name them. Don’t scatter them across folders like a trail of breadcrumbs that raccoons will steal.
• Ask dependency questions out loud. Will we still want this in a year? Can we replace it if needed? Is it solving a hairball or adding one? Think like you’re choosing parts for a bike you ride every day, not a showpiece.
• Consider conversational tools where they fit. If you’re building dev tooling, the MCP model—attach functions to natural descriptions—sounds like a route to reduce friction for your team. But, as thisContext notes, know the protocol and the environment. Describe your tools clearly.
• Use friction with empathy. If you adopt Proof‑of‑Work or headless checks, tune them like you’re adjusting a thermostat. Small changes matter. Humans should feel breezy. Bots should feel sweaty.

I’d say these are not “breakthrough” ideas, and that’s what makes them nice. You can do them on a Tuesday. They stack.

Some digressions that still circle back

This week also felt like a little mirror held up to JavaScript culture. We like toys. We like clever bits. A CRT effect? Love it. AI tools? Shiny. Filters? Cute, until there are thirty. Dependencies? The candy aisle is long and full of bright wrappers. The posts don’t scold, but they do nudge. Play, but clean up after.

The MCP thing made me think about how we speak to our tools. For years, we wrote configurations and scripts. Now, we also describe tasks in plain language, and the machine tries to help. I’d describe that shift as using a universal remote in a house full of gadgets. When it works, you press one button and the lights dim, the TV flips inputs, and the speakers change modes. But it only works if those little IR blasters are aimed right and the labels make sense. That’s the environment requirement. That’s the proxy server. It all looks simple on the couch, complex behind the cabinet doors.

Meanwhile, the dependency conversation is the opposite kind of simplicity. It says: a library saves time, but not always; writing your own gives control, but not always. There’s no rule that rescues you. The work is in the thinking. It’s a bit like cooking on a weeknight. Sometimes you grab a jar of sauce, and that’s perfect. Sometimes you make it from scratch because you have basil in the garden. The smart part is knowing which night is which.

And the Anubis posts? They add a bit of civic design to the web. Proof‑of‑Work is like putting a speed bump near a school. People grumble, but the kids get home safer. Not everyone loves speed bumps. They’re blunt. But they work, and you can pick the height. The posts seem interested in the gentler settings. That care matters.

The vibe of craft, not just code

I’d describe the tone of the week as craftsmanlike. People touching edges. Sanding splinters. Not many huge architectural rewrites or shiny frameworks. Instead, a pinch of housekeeping in Eleventy. A three‑line guard around a pushy script. An essay that reframes a team debate so you can make a calmer choice. A protocol piece that brings a new tool into reach without sounding like a launch party.

What I liked most is how these notes are reusable across stacks. Eleventy filters could be Jinja filters. The snippet idea could be a pattern in Rails views or Next middleware. The dependency notes travel anywhere. The MCP model will show up in editors, CLIs, and even test runners. And Proof‑of‑Work logic, even if you don’t ship it, forces a helpful question: who is this content for, and how do we keep it friendly for them?

A tiny recap by dates, just for bearings

• 09/22: Unlisted Retrograde Holdout fixed a real‑world bug by not running a preloader on certain pages and by dropping an unnecessary CRT effect. Small code. Big calm.
• 09/24: Gianluca Arbezzano framed the dependency choice with a career‑long lens, touching both Golang and JavaScript. Pragmatism over purity.
• 09/24: thisContext wrote about MCP tools, how to wire them, and a proxy setup. Conversational skills inside coding assistants, with protocol discipline.
• 09/25: Juha‑Matti Santala explained Eleventy filters and how to organize them like a proper toolkit. A tidy kitchen makes better meals.
• 09/25 and 09/27: Michał Sapka pushed on anti‑scraping via Anubis, using Proof‑of‑Work and headless detection to keep the user experience sane.

If any of these sparks curiosity, their author pages carry more detail, examples, and a few decisions that I’m not spoiling here. Worth a read, especially if your project hits a similar bump.

Little patterns hiding in plain sight

Something about the bug fix and the Eleventy filters also reminded me of team habits. In many teams, a single person quietly knows where all these tiny helpers live. You need a date format? Ask Jen. You need to bypass a script? Ask Rui. Then people take vacations, and a sprint trips on tiny things. Writing down simple rules like “filters live here” and “effects run only here” frees everyone’s brain.

The dependency piece adds a second layer: write down your decision. A small decision record. Why we added this package. What we expect. When we’ll revisit. It’s more work the first time. But the next time someone asks “Can we drop this?” you have an answer that survived time. I know that sounds like process talk, and process talk can be dull. But it’s like labeling the jar in the pantry. Future you says thank you.

And MCP? The best tools often start as a two‑function demo, written on a Friday. The trick is making them useful without making them mysterious. The anatomy guidance in thisContext’s post helps with that. A little structure keeps the magic from turning into a hairball.

Finally, for the Anubis work: if you’re tempted to roll something similar, test with low‑power devices. Give your site a spin on an older phone, or with power‑saving mode on. If the puzzle feels like molasses there, tune it. The point is humane friction, not a gym class.

Where the road might bend next

If these threads keep tugging, I’d expect more micro‑guardrails in the wild. More projects will ship only‑on‑these‑pages scripts, not everything everywhere. Static site folks will collect their filters like baseball cards, trade them, keep them named. Dependency conversations might get more public in repos, maybe a tiny template in PR descriptions. And MCP‑style tools will likely show up in editors and CI bots—tools that can explain themselves when asked.

As for scraping, the sense I got is that people are moving from voicing worry to deploying knobs. Not the nuclear option. Knobs. Turnable, testable, reversible. If the week had a motto, I’d say it’s: give yourself dials. Don’t lock the door unless you have to. Put a mat by the entrance and a small sign that says: wipe your feet.

If you’re in the middle of a release and you just need one idea to borrow, I’d pick this: make a tiny list of where each front‑end script is allowed to run. It sounds almost silly. But it changes your posture. Code becomes a guest with an invitation, not a roommate who never pays rent.

There’s more texture and more edge cases in each author’s full piece. The snippets, the real examples, the arguments, and the little confessions that make posts helpful. If any of this made you nod, hop to their pages:

• Unlisted Retrograde Holdout
• Gianluca Arbezzano
• thisContext
• Juha‑Matti Santala
• Michał Sapka

I’d say it’s a good week to make the codebase a little kinder. Like cleaning out the car before a road trip. A quick vacuum, a playlist, maybe a new air freshener. Not mandatory. Just nicer. And it helps you enjoy the ride a bit more.