Htmx 4.0, the first JavaScript library to release exclusively on the Game Boy

Original Article ↗ Hacker News Discussion ↗

HTMX’s latest release is packaged as an actual Game Boy cartridge, doubling as a Mario-style platformer that unlocks the 4.0 source code when you beat the final boss. Commenters see this stunt as emblematic of HTMX’s playful, anti-complexity ethos and share how the library has let them replace heavy SPA stacks with fast, server-rendered apps using tools like Go, PostgreSQL, and classic templating. Alongside nostalgia for retro hardware, the conversation highlights broader trends away from React-style complexity toward simpler, hypermedia-driven architectures, while noting trade-offs around progressive enhancement and no-JavaScript fallbacks.

Game Boy release of HTMX 4.0

  • HTMX 4.0 is being released as a real Game Boy / Game Boy Color cartridge, Mario-style platformer with multiple levels and biomes and a final boss.
  • Beating the boss unlocks the HTMX 4.0 source code; one comment says there’s a “source code reader” at the end and suggests you’d need to transcribe it, transfer options are “TBD.”
  • The game was built in GB Studio with heavy customizations; GB Studio’s built-in sound engine was used and praised.
  • 1,000 carts were made, 150 given away at a conference; it’s priced low ($25) intentionally “for fun,” not profit.
  • Some praise the physical production quality and cleverness; people anticipate unboxing/let’s-play videos and are buying extra swag.

Developer experience with HTMX

  • Many commenters report HTMX “unlocking” or simplifying web development:
    • Replacing large JS codebases and SPA front ends with server-side templates + HTMX.
    • Achieving better performance, fewer bugs, easier debugging, and higher Lighthouse/WebSpeed scores.
    • Especially popular with small apps, personal projects, academic sites, and B2B tools.
  • Some find HTMX limiting compared to vanilla JS or prefer other frameworks (Vue, React, Turbo, etc.) for specific workflows.
  • Go + HTMX + PostgreSQL is a popular stack; people share patterns (stdlib net/http, html/template, OpenAPI codegen, embedded assets).
  • Others experiment with HTMX backed by AWS Step Functions, using JSONata and parallel states to render pages.

Comparisons to other paradigms

  • Strong nostalgia for “old-school” server-side rendering (LAMP, Web Forms, Delphi IntraWeb), with HTMX seen as a modern refinement.
  • Several express fatigue with React/SPA complexity and tooling; some still like TSX and the “website as API client” model.
  • Some argue SQLite would often be sufficient; others standardize on Postgres due to existing usage and upgrade experience.

Progressive enhancement and no-JS concerns

  • A subset criticizes HTMX usage that breaks non-JS operation, citing a forum that partially fails without scripts.
  • Turbo is cited as more explicitly progressive-enhancement-first.
  • Others note HTMX can be used in a progressive way but requires discipline; easy to slip into JS-required designs.
  • One comment wishes HTMX-like behavior were native HTML/browser functionality.

Art, swag, and community vibe

  • HTMX’s playful culture (Game Boy release, mugs, onesies) is widely appreciated and seen as “keeping software fun.”
  • One person suspects the box art looks AI-generated; others clarify it’s human-made artwork and layout, with only minor AI help for a CRT effect.
  • Multiple comments highlight the responsiveness of the swag store and the overall “craft and delight” ethos.