Great. I just discovered this resource, which powers the official HTMX examples: https://htmx.org/js/demo.js
Please assess if this page can be meaningfully improved by using this directly or copy/pasting bits of this instead?
The answer might be no. I'm just curious what is here, what we have, and if what is here could be useful.
Take your time to think it thru.
The user wants me to look at the official HTMX demo.js file to see if it could improve our mock server implementation. Let me fetch and analyze it.
{
"url": "https://htmx.org/js/demo.js",
"prompt": "Extract the complete JavaScript code and explain what it does - how it mocks server responses for HTMX demos."
}# JavaScript Mock Server for HTMX Demos ## Overview This code establishes a fake HTTP server using Sinon.JS to intercept and respond to HTMX requests without real backend calls, enabling interactive demonstrations. ## Key Components **Server Setup** The initialization creates a Sinon fake server with "X-HTTP-Method-Override" header support and automatic responses after 80ms. It filters requests, allowing only root paths and external URLs to pass through. **Request Parsing** The `parseParams()` function extracts query strings and form data, handling URL decoding and HTML encoding. The `getQuery()` utility isolates the query portion from URLs, while `encodeHTML()` sanitizes special characters for safe display. **HTTP Method Handlers** Four routing functions—`onGet()`, `onPost()`, `onPut()`, `onDelete()`—register response handlers. Each accepts a path and callback, with the callback receiving the request object, parsed parameters, and a mutable headers dictionary. **Activity Tracking** An HTMX listener monitors "beforeSwap" events, logging each request as an activity chip in a timeline. The code maintains a request counter and displays responses up to 750 characters, with truncation indicated by ellipsis. **Display Templates** Helper functions generate HTML for initial page state and server responses, formatting them as highlighted code blocks with request metadata including method, URL, parameters, and headers. This framework enables developers to prototype HTMX interactions while simulating realistic server behavior entirely client-side.
Interesting. The official htmx demo.js uses Sinon.js (a mocking library) to create a fake server. Let me think about the differences:
Official demo.js approach:
- Uses Sinon.js fake server (external dependency)
- Has a routing API: onGet('/path', handler), onPost('/path', handler)
- Parses query params and form data
- Has activity tracking (shows request/response in a timeline)
- 80ms delay
- More structured and reusable
Our approach:
- No external dependencies (pure JS)
- Intercepts fetch() directly
- Simple key-based matching: 'POST /demo/clicked'
- Console logging for debugging
- 150-200ms delays
- Self-contained
Assessment:
NO. Adding a dependency goes against the "no dependencies" ethos of the page. Our pure JS approach is more in keeping with the spirit of the site.
Is the routing API pattern better?
It's more elegant for complex demos with many routes, but for our 3 simple demos, the key-based approach is fine. The onGet('/path', fn) pattern would be overkill.
Activity tracking (showing request/response logs)?
This IS interesting. It would be educational to show users what's happening. But it would add visual complexity to the page and might distract from the main message. The console.log statements serve a similar purpose for curious developers who open DevTools.
Parameter parsing?
Conclusion: Our implementation is simpler, has no dependencies, and is appropriate for our use case. The official demo.js is designed for the htmx.org documentation site which has many different demos and needs a more structured approach.
The only feature that might be worth considering is the activity tracking UI, but I think it would clutter the page. The console logs are sufficient for curious developers.
I'll draft a concise summary to share the key insights from this comparative analysis.
What the official demo.js does:
- Uses Sinon.js (external library) to create a fake server
- Provides a clean routing API: onGet('/path', handler), onPost('/path', handler)
- Parses query params and form data automatically
- Has an activity tracker UI that shows request/response logs visually on the page
- 80ms response delay
What we have:
- Pure JS fetch() interception, no dependencies
- Simple key-based matching ('POST /demo/clicked')
- Console logging for debugging
- 150-200ms delays
- Completely self-contained
Reasons:
No external dependencies - Our approach fits the "no package.json" ethos of the page. Adding Sinon.js would undermine the message.
Simpler for our use case - The official demo.js is built for htmx.org which has dozens of demos. We have 3. Our key-based approach is plenty.
The activity tracker is tempting but wrong for us - It would be educational to show requests/responses visually, but it would clutter the page and distract from the main argument. Curious developers can open DevTools and see the console logs.
Ours actually works with htmx 4 - The official demo.js intercepts XMLHttpRequest via Sinon. We intercept fetch(), which is what htmx 4 uses.
One small thing we could steal: The 80ms delay feels snappier. We could drop ours from 150-200ms to ~100ms. But that's minor.
Bottom line: We independently arrived at a similar solution, just lighter weight. Ship it.
Thanks. This dialog has been educational and interesting. Please save a transcript of this dialog as a .md file.
The user wants me to save a transcript of our conversation as a markdown file. I should create a comprehensive markdown file that captures the key parts of our dialog - the research, planning, implementation, debugging, and final review.
# Build Log: pleasejusttryhtmx.com
A transcript of building the HTMX advocacy site with Claude Code.
---
## Project Brief
From `AGENTS.md`:
- Build a single-page website for https://pleasejusttryhtmx.com
- Advocate for HTMX in a pugnacious, opinionated, but factual style
- Inspired by: motherfuckingwebsite.com, justfuckingusehtml.com, bettermotherfuckingwebsite.com, justfuckingusereact.com
- The site should be "in dialog" with these reference sites
---
## Research Phase
### Reference Sites Analysis
**Common patterns identified:**
1. Aggressive, profane tone as rhetorical device
2. Direct second-person address ("you dipshit")
3. Minimal design as proof - the medium IS the message
4. Short, punchy sections with headers and bullet points
5. Hyperbolic comparisons for humor
6. Self-aware irony acknowledging exceptions
7. Structure: hook → problem → solution → proof → exceptions → call to action
**The debate these sites represent:**
- motherfuckingwebsite: "Your site doesn't need all that crap"
- bettermotherfuckingwebsite: "Ok but a LITTLE CSS is nice"
- justfuckingusehtml: "Stop using frameworks, HTML does everything"
- justfuckingusereact: "Actually complex apps NEED React"
**Our position:** The middle path - you don't need React's complexity AND you don't have to accept raw HTML's limitations. HTMX gives you interactivity without the bullshit.
### HTMX Research
**Key selling points:**
- Any HTML element can make HTTP requests
- Server returns HTML, not JSON
- ~14kb gzipped, zero dependencies
- "Locality of Behavior" - logic is in the markup
**Killer stats (Contexte case study):**
- 67% less code (21,500 → 7,200 lines)
- 96% fewer JS dependencies (255 → 9)
- 88% faster builds (40s → 5s)
- 50-60% faster page loads
---
## Implementation
### Initial Approach
Created a single HTML file with:
- Minimal, readable CSS (inspired by bettermotherfuckingwebsite)
- Working HTMX demos with mocked server responses
- Profane but measured tone - "I'm not going to call you a fucking moron every other sentence. That's been done."
### The Demo Problem
**First attempt:** Mocked XMLHttpRequest
- Didn't work - HTMX 2.x was using XHR but our mock wasn't firing
**Second attempt:** Mocked fetch()
- Didn't work - turned out HTMX 2.x actually uses XHR, not fetch
**Third attempt:** Back to XHR mock
- Still had issues
**Solution:** Upgraded to HTMX 4.0.0-alpha2
- HTMX 4 uses fetch() by default ("The Fetchening")
- Our fetch() mock worked perfectly
### Mock Server Implementation
```javascript
// Intercept fetch() for demo purposes (HTMX 4.x uses fetch)
const originalFetch = window.fetch;
window.fetch = function(input, options = {}) {
// Handle both Request objects and string URLs
let url, method;
if (input instanceof Request) {
url = input.url;
method = input.method.toUpperCase();
} else {
url = String(input);
method = (options.method || 'GET').toUpperCase();
}
// Match against mock responses...
};
```
Console logging kept intentionally - educational for developers who open DevTools.
---
## Deployment
### GitHub Pages Setup
1. Created repo with `gh repo create`
2. Switched remote from HTTPS to SSH: `git remote set-url origin git@github.com:algal/pleasejusttryhtmx.git`
3. Added `CNAME` file with domain
4. Enabled Pages in repo settings (Deploy from branch: main)
### DNS Configuration
```
A @ 185.199.108.153
A @ 185.199.109.153
A @ 185.199.110.153
A @ 185.199.111.153
CNAME www algal.github.io
```
### HTTPS
GitHub Pages auto-provisions Let's Encrypt certificates for custom domains. Takes 15-30 minutes after DNS is configured.
---
## Revisions & Polish
### User Edits
- Added inline links to reference sites in opening paragraphs
- Praise for bettermotherfuckingwebsite moved to footnote
- Changed "tasteful" from bold to italic
- Various copy tweaks
### Fixes
- Title/h1 mismatch identified (intentional - different for SEO vs display)
- "motherfucking fucking" double-word typo fixed
- Added link to Contexte case study
- Added link to hypermedia.systems on "hypermedia architecture"
- Fixed `.cta code` CSS (was white-on-white)
---
## Comparison with Official HTMX Demo Approach
The official htmx.org demos use `demo.js` which:
- Uses Sinon.js for fake server
- Has routing API: `onGet('/path', handler)`
- Includes visual activity tracker
**We kept our approach because:**
1. No external dependencies (fits "no package.json" message)
2. Simpler for 3 demos vs dozens
3. Works with htmx 4's fetch()
4. Console logs serve similar purpose to activity tracker
---
## Final Tech Stack
- Single HTML file
- HTMX 4.0.0-alpha2 from unpkg CDN
- Pure CSS (no framework)
- Pure JS fetch() mock (no Sinon)
- GitHub Pages hosting
- Custom domain with Let's Encrypt HTTPS
---
## Key Learnings
1. **HTMX 2.x uses XHR, HTMX 4.x uses fetch()** - important for mocking
2. **Chrome caches aggressively** - Ctrl+Shift+R for hard refresh
3. **GitHub Pages HTTPS takes time** - certificate provisioning is automatic but not instant
4. **The genre has rules** - profanity as rhetoric, minimal design as proof, self-aware acknowledgment of exceptions
5. **`gh` CLI defaults to HTTPS** - use `git remote set-url` to switch to SSH
---
*Built with Claude Code (Opus 4.5) - December 2024*
I've created a comprehensive build log that captures the key parts of our conversation - the research, planning, implementation challenges (especially the XHR vs fetch debugging), deployment, revisions, and learnings. This should be a useful reference document.
Done. Saved to BUILD_LOG.md - covers the research, implementation, the XHR-vs-fetch debugging saga, deployment, and key learnings.
This was fun. Good luck with the site!