HTML is complex:

• 111 elements
• Developers don't know the difference between HTML tags and elements (so this one begs the question how well developers understand HTML if they’re not sure about the difference between elements and tags)
• To reduce HTML payload is not to write HTML that can be left out without a document turning invalid.

Jens Oliver Meiert is writing a book about it.

Starting with raw HTML, then provides more features with JS

From scratch

The author provides a list of hosting too: https://web.pixelshannon.com/make/#:~:text=where%20can%20i%20publish%20my%20website%20for%20free%3F

A modern marquee element

The type=number state is not appropriate for input that happens to only consist of numbers but isn't strictly speaking a number. For example, it would be inappropriate for credit card numbers or US postal codes. A simple way of determining whether to use type=number is to consider whether it would make sense for the input control to have a spinbox interface (e.g. with "up" and "down" arrows). Getting a credit card number wrong by 1 in the last digit isn't a minor mistake, it's as wrong as getting every digit incorrect. So it would not make sense for the user to select a credit card number using "up" and "down" buttons. When a spinbox interface is not appropriate, type=text is probably the right choice (possibly with an inputmode or pattern attribute).

inputmode="decimal" or inputmode="number" fit better for these cases.

New HTML features of 2025

I agree

An accessibility decision tree for the alt attribute

Video elements can be responsive now. Here's how.

Sometimes ARIA is needed to convey informations such as a link pointing to the current page.
The example for form error is great too !

Everything needed to build a proper pagination in HTML

Use the translate="no" on a tag (often a span) to avoid translations on specific words such as brands.

<datalist> can be combined with more than raw text inputs!

About microdata:

Labelling things properly is still a powerful act, especially when it involves repetition and relationship-building.

What the post is missing is: how building these connections are useful? Ok it's great for AI models that are parsing the site...

Getting started with Microdata

The specification of microdata

A rating UI pattern with smileys: only built with HTML and css.

Useful for stat callouts, word definitions, product listing technical specs