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Posted by pretext 12 hours ago

Using Claude Code: The unreasonable effectiveness of HTML(twitter.com)
Examples: https://thariqs.github.io/html-effectiveness/

Related: https://simonwillison.net/2026/May/8/unreasonable-effectiven...

307 points | 195 commentspage 7
jcutrell 1 hour ago|
This really is the perfect time for something like MDX to shine.
nojvek 2 hours ago||
One layer above html is having Claude produce .jsx or .tsx files.

Because it can have little components with jsx (html like) bits, it’s fairly human readable and editable.

Components give it semantic compression and the high level scan makes it easier to understand and change.

doc_ick 10 hours ago||
~html has more capabilities than markdown~ the real title

Weren’t llms specifically originally set to output and print markdown format since it is simpler and easier everyone to read? No different rendering/libraries/apis to worry about…

mock-possum 2 hours ago||
Let’s be fair, about half of these things are provided by markdown as well:

> Tabular data using tables yes > Illustrations with SVG yes > Code snippets with script tags yes > Workflows using SVG and HTML svgs yes > Images using image tags yes > Design data with CSS no > Interactions using HTML elements with javascript + CSS no > Spatial data using absolute positions and canvases no, although svgs help

That said, I can kinda get behind this ‘html, not markdown’ idea - as much as I like keeping things lean and mean, and markdown is ‘just enough’ semantics and style on top of plaintext… it can admittedly be more useful to recieve a more flavorful writeup from an LLM, if it’s going to be a piece that really requires you to engage with it, rather than just a quick read. Certainly a better fit for reports.

realrocker 11 hours ago||
I am working on https://github.com/livetemplate/tinkerdown to leverage the the two effective outputs of LLMs : html and markdown . Still WIP
igtztorrero 2 hours ago||
I use obsidian MD editor to save important chats I made on Claude or Gemini.

It's the best markdown editor.

So when I need to check any past reference I just open my folder or files.

Html it's so ugly.

I wish IA products add a save al chat button, to avoid copy and paste every response.

mmckelvy 4 hours ago||
Another great use case is piping database output (e.g. psql) directly to HTML. HTML tables can be opened in a browser or directly in Excel. So all you need for a complete BI tool is a database and the command line.
Kwpolska 10 hours ago||
I guess the author has never heard of Markdown editors with a preview feature, and doesn't know that the Claude Code VS Code plugin opens plans in preview mode.
weird-eye-issue 10 hours ago|
Are you just trying to pretend that Markdown is as rich as HTML and that all the use cases that they described are possible with Markdown?
mark_and_sweep 9 hours ago|||
Technically, yes. Markdown was always intended to be used for creating HTML and thus allows you to use HTML inline (with some minor caveats, see: https://daringfireball.net/projects/markdown/syntax#html).

If you rename a .html file to .md, your markdown viewer should render it just the same as your browser did.

jason1cho 10 hours ago|||
Markdown was a hype in late 2010s that has cooled down due to chatbots.

In turn, chatbots pump up markdown by making it the default output format.

albedoa 4 hours ago|||
> has cooled down due to chatbots.

What in the world.

k4rli 10 hours ago|||
I've felt the opposite. With MD being the preferred planning+documentation output for LLMs, the time of "hype" seems to be now. It seemed just a few years ago that devs hated writing properly formatted markdown.
whatever1 11 hours ago||
Do we have local first html renderers that don’t complain about cors and wrong file addresses? I don’t want to spin up a server just to open an HTML file
koolala 11 hours ago|
The unreasonable effectiveness of HtmlX.
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