JavaScript Weekly

Reimplementing htmx from scratch

Tue, 4 Aug 2026 00:00:00 +0000

#797 — August 4, 2026

JavaScript Weekly

Next.js 16.3 Released — The newly expanded Next.js team (now including Dan Abramov and 𝕏 Pete Hunt!) has dropped the latest version of the popular React framework, complete with faster builds, optional TypeScript 7 type checking, faster SSR, Instant Navigations, AI improvements, and more.

The Next.js Team

Frontend Architecture: Monoliths to Microfrontends — Maxi Ferreira walks through modular monoliths, monorepos, and microfrontends so you can pick the right structure for your codebase and know the real cost before you commit.

Master.dev sponsor

Let's Make the Worst htmx Ever — After making the 'worst' React and Vue.js implementations, Serge tackles rebuilding the essence of htmx from scratch. A fun way to understand what htmx actually does under the hood.

Serge Zaitsev

The Secure Way to Release an npm Package in 2026 — A practical guide to publishing npm packages more safely, written by the author of numerous popular packages (e.g. postcss). As well as showing how to use staged publishing and trusted publishing, he explains why they help.

Andrey Sitnik

💡 GitHub is continuing to focus on npm security, and is starting to scan every npm package for malware at publish time. This will have some implications, including a delay between publishing and availability for installation.

IN BRIEF:

🚨 Developing incident: The popular keyv and cacheable packages were compromised today with a credential-stealing worm. The repercussions are ongoing with hundreds more packages compromised so far.
Monthly updates from the Astro team and the Svelte team. The first preview releases of SvelteKit 3 are now available.
⚖️ The Deno vs Oracle JavaScript™ trademark case rattles on with Deno consenting to a fifth extension request as discovery continues.
Popular JS library factory TanStack has rebranded and introduced new 'Markdown' and 'Highlight' libraries.

RELEASES:

MobX 7.0 – The popular state manager slims down, removes deprecations, updates its React bindings, and now always uses Proxy-backed observable objects and arrays.
Javy 9.1 – Toolchain for compiling JavaScript to WebAssembly for WASM runtimes.
Node.js v26.6.0 (Current) and v24.19.0 (LTS)
Vite 8.2, React Three Fiber 9.7, Lerna 10.0, Hono 4.13.0

📖 Articles and Videos

Your SPA is Leaking Memory: 'Soak Test' It — How to run a Playwright 'soak test' that loops a user flow within the same browser context, watches DOM node and listener counts, and fails CI when a memory leak creeps in.

Den Odell

Your JSON is Lying to You — A reminder that a JSON.parse/JSON.stringify round-trip is far from lossless, with big integers, undefined, Date, and more, altered or lost along the way. Gabor covers the nastier gotchas and practical ways to make the conversion boundaries explicit.

Gabor Koos

Don’t Just Code—Grow as a Technologist — Explore new technology, sharpen your existing skills and build new ones when you work in tech at Fidelity.

Fidelity Careers sponsor

cdnjs at 9 Billion Requests a Day: A Migration Story — cdnjs is a popular, free CDN for loading JavaScript libraries without bundling or self-hosting (which LLMs really seem to like). Cloudflare explains how it now runs entirely on Workers and R2.

Simona Badoiu (Cloudflare)

Adding Go's defer to the TypeScript Compiler — In Go, defer delays the execution of a function call until the surrounding function finishes. Can you just fork TypeScript and add language features? Yes! Should you? Probably not, as using is already a good fit for the use case.

Andrew Healey

📄 Learning Remix 3 – By porting a Solid 2.0 demo to Remix 3's server-first model. Mark Malstrom

📄 Why npm Dependency Trees Are So Big Andrew Nesbitt

🛠 Code & Tools

TanStack Charts: A New Chart Grammar Option — In the past few weeks, TanStack has been rapidly iterating on a new, framework-neutral way to declaratively specify a large number of chart-related visualizations in JavaScript. Output renders to SVG or canvas and can be styled as you wish. Here's a comparison against other established options.

TanStack

An Open Source PR Reviewer Just Ranked #2 of 42 on Code-Review-Bench — PR-AF outranks the commercial tools. Verified findings only, ~10x cheaper, self-hosted. Drops into GitHub Actions.

Agentfield.ai sponsor

MicroDiff 1.6: Fast Object and Array Comparison Library — Given two objects or arrays, it returns the differences (think diff but for JS objects). This week's release adds support for Temporal types.

Jacob Jackson

💡 Jacob has a post from 2022 covering how microdiff is so fast.

Virtua: Virtual List and Grid Component for Multiple Frameworks — A fast and small virtual list/grid component for React, Vue, Solid, Svelte, and Angular. Here's a demo and a comparison table against other solutions.

inokawa

📊 Perspective 5: Interactive Analytics and Data Vis Component — Originally built by JP Morgan, a WASM-powered data visualization component suited to large and/or real-time streaming datasets. 5.0/5.1 just dropped with numerous fixes, wasm64 builds, and window columns.

OpenJS Foundation

Neutralinojs 6.9 – The lightweight Electron alternative has a new C++ network API for making HTTP requests free of the webview's CORS restrictions.
DukPy 0.6 – Simple JavaScript interpreter for Python. Now uses the QuickJS-NG engine to support more modern JavaScript and Promises.
isomorphic-git 1.40.0 – A pure JS implementation of Git for Node & browsers.
better-result 3.0 – Lightweight Result type for TypeScript with generator-based composition.
ip-address 10.4 – Parse, validate and manipulate IP (v4 and v6) addresses.

📰 Classifieds

⚡ Stop being the integration layer. Build a CRM-to-signed-PDF pipeline in n8n with plain HTTP calls. No SDK, no manual file handling.

Flaky tests slowing down dev? Meticulous gives engineers confidence to ship faster by autonomously testing every edge case of your web app.

⚡ Zuplo puts every API, AI, and MCP request behind one gateway. Route traffic, guard your MCP servers, and cap your AI costs. Try it free.

📢 Elsewhere in the ecosystem

Did you know JavaScript supports a third type of comment (beyond // and /* */)? ▶️ Mat Marquis shows off hashbang comments in a short YouTube video. And yes, they're in the language spec!
🤖 GitHub's Sean Goedecke says LLMs reward expertise, with the most important prompting skill being expertise in the domain you're prompting for.
Microsoft is previewing a way to call native Windows APIs from Node (and therefore Electron) without native addons, via a new dynamic Windows Runtime API (WinRT) projection.
Cloudflare Workers has added support for inbound TCP connections and gRPC (in private beta).
Stacked pull requests are now in public preview on GitHub.

Anders Hejlsberg demos TypeScript 7's 10x speedup

Tue, 28 Jul 2026 00:00:00 +0000

#796 — July 28, 2026

Read on the Web

JavaScript Weekly

Rust Is Eating JavaScript (Still, in 2026) — Our most-read link of 2021 gets an update for 2026. Lee Robinson (then Vercel, now Cursor) predicted Rust would be used to reimplement more and more JavaScript ecosystem tooling, and Rspack, Biome, Turbopack, and Bun's recent rewrite keep proving him right.

Lee Robinson

Master.dev sponsor

Octane: React's Programming Model, But Compiled — From the creator of Inferno comes a successor: a compiled React-like framework (differences explained here) that generates reactivity ahead of time with no VDOM. Supports TSX/JSX and TSRX, with integrations for TanStack Query and Router, plus other common React libraries.

Dominic Gannaway

IN BRIEF:

😄 htmx 4.0 is, curiously, pitching itself as "the first JavaScript library to release exclusively on the Game Boy" with a commemorative cartridge.
At last week's TC39 meeting, Await Dictionary (Promise.allKeyed) progressed to Stage 3.
Ryan Dahl says that deno compile will soon support using QuickJS instead of V8 for making radically smaller binaries from JS/TS projects.
Node.js has a new API docs site in preview (now includes search!)
Oxlint's type-aware linting is now stable.

RELEASES:

pnpm has had a flurry of releases introducing native workspace release management, a doctor command to diagnose installation issues, and more.
React 19.2.8, 19.1.9 and 19.0.8 to fix a potential DoS vulnerability in server function endpoints.
Ember 7.1 – Adds a wide variety of new helpers and operators, and docs modernization.
Nuxt 4.5.1 and 3.21.10 – Security patch releases after last week's big Nuxt 4.5 release.
ESLint 10.8, Deno 2.9.4, Prisma 7.9, React Router 8.3, Vue 3.6 RC2

📖 Articles and Videos

▶ The Creator of TypeScript Shows Off TypeScript 7 — Anders Hejlsberg demos the 10x speedup gained by the new Go-based TypeScript compiler on VS Code's 1.3M line codebase. He also covers the new LSP language server and why compiler API users (Vue, Astro, Svelte) must stay on TypeScript 6.

Anders Hejlsberg (Microsoft)

Domenic Denicola's Agentic Coding Setup — It's fascinating when a prolific developer (Domenic was a key figure in the adoption of promises in JavaScript, creating jsdom, and much more) shares their workflow. This is no exception, covering areas like disposable VMs, Tailscale, and worktrees.

Domenic Denicola

Still Writing Tests Manually? Meticulous AI Is Here — Flaky tests slowing down dev? Meticulous gives engineers confidence to ship faster by autonomously testing every edge case of your web app.

Meticulous sponsor

How Medium Built Its New 'Table of Contents' Feature — How the content site built a dynamic table of contents widget for all its articles, inspired by a third-party Chrome extension that did the same thing.

Scott Batson (Medium)

📄 Introducing Deferred Module Evaluation with import defer – Currently at stage 3 in the TC39 process. Nitay Neeman

📄 Measuring Component Performance with the Container Timing API – Now in a Chrome origin trial. Harry Roberts

📄 No, We Can't Harden Node.js Against Prototype Pollution Matteo Collina

📄 Cloudflare Workers and Hyperdrive with SvelteKit Adam Rackis

🛠 Code & Tools

🌐 MapLibre GL JS 6.0: Interactive Vector Maps for the Web — A WebGL-powered library for rendering interactive vector tile maps, forked from Mapbox GL JS after its 2020 relicensing. Version 6 goes ESM-only, requires WebGL 2, and lands broad performance gains. Release notes and a v5 to v6 migration guide.

MapLibre

Ship Translations Without Redeploying. Made by the i18next Team — The cloud TMS from the i18next team. saveMissing, in-context editor, AI translation, CDN. Free tier, Swiss-made.

Locize sponsor

Bruno 4.0: An Open-Source HTTP API Client App — An open source, JavaScript-powered lightweight alternative to something like Postman for testing and making requests against HTTP APIs.

Anoop M D, Anusree P S and Contributors

tslog 5: Zero-Dependency Logger for Node, Deno, Bun and Browsers — A ground-up rewrite, now ESM-only, and also covers workers and React Native. Pretty output by default, JSON optionally, plus middleware, file/HTTP/worker transports, secret masking, and error stacks that resolve through source maps to your original .ts lines. GitHub repo.

Eugene Terehov

eslint-package-json: Powerful ESLint Rules for package.json — An ESLint plugin that catches package.json mistakes like invalid names, bad version ranges, broken exports, redundant files entries, and more, and fixes many of them automatically.

Sindre Sorhus

Shadscan: Deterministic UI Audits for shadcn Apps — A tool that statically analyzes your shadcn components using almost 60 deterministic checks (no AI or API keys needed) around fundamental accessibility, state, and composition best practices.

OrcDev

Slick 2.0 – Ken Wheeler's classic jQuery carousel control (demos). Now compatible with jQuery 4.0!
isomorphic-git 1.40 – Pure JS implementation of Git for Node and browsers.
Satori 0.29 – Library to convert HTML and CSS with JSX syntax into SVG.
dompdf.js 2.0 – Converts HTML to multi-page PDFs in the browser.
Verdaccio 6.9 – Self-hostable Node.js private proxy registry.

📰 Classifieds

From $500 a month to hundreds of thousands of downloads in six months. How one solo Expo app actually grew usage and revenue.

You shipped the feature. The data grew. The query got slow. TimescaleDB extends Postgres for analytics at scale, no second database.

📢 Elsewhere in the ecosystem

js1024 is an annual JavaScript code-golfing competition where people try to squeeze as much out of 1024 bytes as possible. This year's run just closed and you can try all the entries (and see their code) here – the winners will be announced next week.
🏆 The OpenJS Foundation has a ranking of the top contributors to its projects (which include Node, Express, and Electron) in the past year.
🤖 In How I Stopped Running Out of Tokens, a dev whose company uses Claude Enterprise shares tools you can use (e.g. rtk) to get more out of your limits.
LLMs are continuing to hallucinate package names, giving potential 'slopsquatters' opportunities for malicious deeds.

The coding challenge you don't want to pass

Tue, 21 Jul 2026 00:00:00 +0000

#795 — July 21, 2026

Read on the Web

JavaScript Weekly

Framework Benchmarks: Compare Frontend Frameworks — An experienced developer built and benchmarked the same app across numerous frameworks (e.g. Angular, Solid, React, Alpine.js…). Here are the results, covering bundle size, build time, UX metrics, and more.

Alicia Sykes

💡 Alicia also created Stack Match, a page that lets you specify your criteria for a framework and shows the best matches. Vue usually wins though!

xyOps: Open Source Ops Automation, from the Cronicle Team — Run jobs across your fleet, build visual runbooks, monitor live metrics, and trigger alerts, tickets, snapshots, or follow-up actions. Self-hosted, BSD licensed, and all app features are included. Auto-import from Cronicle.

xyOps sponsor

Nuxt 4.5 Released: The Full-Stack Vue Framework — Daniel Roe calls it the biggest release in a while: Vite 8, Rspack 2, experimental SSR streaming, a new useLayout composable, and a lot of preparation for Nuxt 5. Nuxt 3 users take note: it goes end of life July 31.

Nuxt Team

IN BRIEF:

Vue 3.6 is now in Release Candidate stage – Vapor Mode, first teased over two years ago, is now feature complete and ready to go.
Angular is switching to a yearly release cadence, with v23 scheduled for June 2027, a year after v22 dropped.
ESLint now offers official 'codemods' for automating ESLint version migrations, with v8→v9 and v9→v10 available.
🇫🇷 An official Three.js conference is coming to Paris, France, this September 10-11. Three.js developer Mr.doob will, of course, be there.

RELEASES:

Preact 11.0 Beta 2 – "One of the last betas for Preact 11," says maintainer Jovi De Croock. There's already a migration guide ready to use.
WebStorm 2026.2 – JetBrains' JavaScript IDE adds TypeScript 7 support, and enhances support for Svelte and Vue.
Astro 7.1, Rslint 0.7, Rolldown 1.2, actions/setup-node@v7

📖 Articles and Videos

How a Fake Interview's Coding Challenge Steals Credentials — A dissection of a North Korean campaign that hides malware inside SVG images in a fake job interview's JavaScript 'coding challenge'. The targeting of job-seeking devs is on the increase, as Roman Imankulov recently discovered first-hand.

Daniel Stepanic (Elastic)

Creating Your First Streamed 3D Asset in Under 10 Minutes — Generate a streamable 3D asset, preview it in-browser, and share it. No code, no viewer downloads.

Miris sponsor

Handling Concurrency on the Web with Web Locks API — The Web Locks API is a widely available browser API to allow tabs or workers with the same origin to hold and release locks.

Cesar Contreras

Engineering High-Performance Parsers with Data-Oriented Design — A look into how data-oriented design helped build Yuku, a JavaScript parser that's faster than alternatives like Oxc, SWC or Babel (you can give it a spin here).

Arshad Yaseen

💡 The article is largely about building a parser in Zig but the underlying Yuku and Yuku Analyzer projects are worth checking out.

📄 HTML in Canvas: Rendering Real DOM Inside <canvas> Agustin Barrientos

📺 The Framework Wars are Over: Why No One Dethroned React – Kent's take in 11 minutes. Kent C. Dodds

🛠 Code & Tools

Flint: Chart Specs that Compile to Vega-Lite, ECharts, or Chart.js — A Microsoft project that compiles a simple, declarative JSON-based spec of a data visualization into a form that Vega-Lite, ECharts or Chart.js can render. It's pitched at agentic use, but is a simple intermediate format humans could benefit from too.

Microsoft Research

Query Live Data. Skip the Analytics Pipeline — TimescaleDB extends Postgres for real-time analytics at scale. No second system, no pipeline. Get $1000 credit to start.

Tiger Data (creators of TimescaleDB) sponsor

unwasm: Import .wasm Files Like Any Other ES Module — Build-time tooling for when WASM is part of a bundled app and you want it to feel more like a normal module (e.g. import { sum } from "sum.wasm").

unjs

BotKit: Build Standalone ActivityPub Bots — A way to run a bot (or multiple bots) that Mastodon users can see and follow but without needing an account anywhere. Write it all in JavaScript and self-host with Deno, Node.js or even Cloudflare Workers.

Fedify

🎨 Color.js 0.7: 'Let’s Get Serious About Color' — A fantastic library for working with colors, following the latest specs. v0.7 is a big update with support for new color spaces, a new gamut mapping method, and a smarter display() fallback for colors not natively supported by a browser.

Lea Verou and Chris Lilley

Travels 2.1 – Efficient framework-agnostic undo/redo library based on JSON patches rather than snapshots.
gridstack.js 13.0 – Mature library for creating responsive dashboard layouts with drag-and-drop support.
np 12.0 – Sindre Sorhus's "better npm publish" adds support for npm 12 and staged publishing.
AngularEditor 3.1 – Simple WYSIWYG rich text editor for Angular 22+. (Demo)
Pinia 4.0 – Vue's state-management library gets leaner and goes ESM-only.
Bolt 5.0 – Slack's official framework for building Slack apps.

📰 Classifieds

🤖 If you can code, you can build a robot. Viam 101 is a free 90-min course — no hardware needed. Sign up by July 31 to win a $3,500 arm.

Flaky tests slowing down dev? Meticulous gives engineers confidence to ship faster by autonomously testing every edge case of your web app.

Drowning in AI dev tools? You really only need these 3 tools to ship mobile apps: skills, MCP, and your workflow. Read the guide.

📢 Elsewhere in the ecosystem

Famously, the only thing Java gave JavaScript was the first four letters of its name. That goes unmentioned in ▶️ this new documentary about Java (74 minutes), but I enjoyed learning Java's story anyway. It's from the same folks as the fantastic Vite, Angular, and Node.js documentaries.
🤖 ReactBench is a new coding agent evaluation based around models' abilities to build working, realistic React apps. GPT 5.6 leads the way for now.
shadcn/typeset is a typography system for rendered HTML that makes font styling and spacing simpler to configure.
Cloudflare has entirely rebuilt its blog on top of EmDash, the Astro-powered 'spiritual successor to WordPress' it unveiled (genuinely) on April 1.
🕹️ If you want to take part in the next js13kGames game dev competition, the theme will be announced on August 13 with submissions due September 13.
✨ An updated list of the top 100 starred JavaScript projects on GitHub.

npm 12, TypeScript 7, and Bun in Rust

Tue, 14 Jul 2026 00:00:00 +0000

#794 — July 14, 2026

Read on the Web

JavaScript Weekly

📈 TanStack's npm Package Download Charts — A quick way to chart package popularity over time, look for trends, and see what libraries and tools have soared or fallen. The default view compares TanStack's packages against several common packages, but you can enter any packages you wish, or see pre-defined sets like build tools, component libraries, or UI frameworks.

TanStack

Your AI Writes the Code. CodeRabbit Reviews It — AI can write the code, but you still own what ships. CodeRabbit is the AI-native review layer that catches the bugs and edge cases humans skim past, so what merges matches what you intended. Free to try, 2-click install.

CodeRabbit sponsor

Rewriting Bun in Rust — Bun's creator shares the full story of porting the JavaScript runtime from Zig to Rust, with the assistance of many Claude Code instances churning through ~$165k in usage (at API prices). The Rust version forms the basis of Bun 1.4, expected any day now.

Jarred Sumner

npm v12 Released: Install Scripts are Off by Default — npm 12 is now GA with many breaking changes. The big change is lifecycle scripts no longer run by default, but here are more practical implications to consider. It may also be worth upgrading via 11.18.0 first.

GitHub

IN BRIEF:

TC39's 115th meeting takes place next week. Here's the agenda, including Await Dictionary aiming for Stage 3, plus Decimal, Import Defer and Map.take.
Next.js now has a formal security release program with monthly announcements and scheduled releases. The first is expected on July 20.
⚠️ The jscrambler npm package suffered a supply chain attack at the weekend which Socket detected within six minutes.
The Porffor ahead-of-time JavaScript compiler is now self-hosting (can compile itself with itself).
Vercel has acquired the team behind Better Auth, the popular auth library.

RELEASES:

⭐ TypeScript 7.0 – The final release of the "10x faster" Go-powered version of the TypeScript compiler is here. A (temporary) lack of a full API means many users are recommended to stay on 6.0 for now, though.
Node.js 26.5.0 (Current) – Adds support for importing text files in ES modules via import attributes, plus blob.textStream().
ESLint 10.7, Storybook 10.5, Vite DevTools 0.4

📖 Articles and Videos

Proxy and Reflect: Redefining How Objects Fundamentally Work — A deep dive into intercepting the internal operations of JavaScript objects, covering why Reflect exists at all, and ending with a small reactive state system (essentially how Vue 3's reactivity works).

Mat Marquis

In Defense of Polyfills — Prolific standards editor Anne van Kesteren said polyfilling is harmful. Lea disagrees, arguing "ponyfills are just userland libraries with better marketing" and a web without polyfills would be a stagnant one.

Lea Verou

Sentry + GitHub: Bugs Diagnosed and Fixed, Live — Sentry catches it, Seer diagnoses it, Copilot writes the fix. Watch Sentry and GitHub break a script live July 15th.

Sentry sponsor

Collaborative Editing in Wordgard — Marijn recently released his new Wordgard rich text editor (and ProseMirror successor). Here's his third take on collaborative editing in eleven years, still based on operational transformation (OT) rather than CRDTs.

Marijn Haverbeke

💡 We missed Marijn's Wordgard release post in last week's Wordgard feature. He explains why and how he built it (no LLMs!) and why he's not taking pull requests.

Reverse Engineering ChatGPT's Web Stack — The author spent days breaking down ChatGPT's page source, bundles, and requests. React Router 7, TanStack Query, Radix, and ProseMirror all make an appearance.

Dennis Brotzky

📄 Playwright on GitHub Actions: A Setup That Actually Runs Fast Jakob Norlin

📄 Building Persistent Page Transitions with WebGPU and Vanilla JS Ben Paine

📄 SolidJS 2.0: A React Developer's First Look at Signals and Async Dennis Morello

🛠 Code & Tools

LiteRT.js: High Performance Web AI Inference from Google — A JavaScript binding of LiteRT for running AI directly inside the web browser, boasting more performance than the TensorFlow.js approach. Here's a CodePen-hosted demo of using it to do image upscaling (surprisingly quickly!)

Yu, Ristić, Soulanille, Parikh (Google)

Full-Text Search in Drizzle Without a Second System — Try the official ParadeDB integration for Drizzle. Search your live Postgres tables. No ETL, no Elasticsearch cluster.

ParadeDB sponsor

Babylon Lite: A Faster, Smaller, WebGPU-Only 3D Engine — Babylon.js is a powerful, long-standing 3D engine, but what would they do if rebuilding from scratch? This! Lite is much faster and smaller, but with some tradeoffs.

Babylon.js Team

Ant: A JavaScript Runtime in a 9MB Binary — No V8, JavaScriptCore or SpiderMonkey involved, this is a JS runtime built in C that ships as a 9MB binary, can run npm packages, and boasts incredibly short cold start times.

theMackabu

🔎 Fuse.js 7.5 – The popular fuzzy search library fixes a variety of scoring and ranking bugs (so ordering may shift for some queries). (Homepage and demo)
Nano ID 6.0 – Tiny, secure, URL-friendly unique string ID generator. nanoid() and customAlphabet() get 4x faster in 6.0.
Mantine Vue – A port of the popular Mantine React component library for use with Vue.

📰 Classifieds

Flaky tests slowing down dev? Meticulous gives engineers confidence to ship faster by autonomously testing every edge case of your web app.

Your dashboard is slow because the query is slow. TimescaleDB extends Postgres for analytics at scale, no second DB.

⚡Sync live context across your entire agent stack. Merget’s now live, build & win a year of Claude Max.

📢 Elsewhere in the ecosystem

FracturedJson is a JSON formatter that produces 'human-readable but fairly compact' output. If you have a big lump of JSON, this makes it more pleasant to look through. It also supports non-standard JSON comments.
Cloudflare has unveiled Precursor, a client-side verification system that uses injected JS to collect behavioral signals (e.g. pointer movement) in an attempt to improve bot detection.

🔠 Geist Pixel (above), the latest member of Vercel's Geist family of fonts, is now available to use on Google Fonts.
Devographics, best known for its State of JavaScript surveys, is back with a more general State of Devs survey to take.
A scrolling visualization of the ~200ms life of an HTTP request.