HTMX is the HTML extension syntax that replaces JavaScript with simple markup. It could change the course of web development.

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HTMX lets you use an extended HTML syntax instead of JavaScript to achieve interactivity. It's an interesting idea that could end up influencing the way web front-ends work. It uses server-side rendering of the HTML for the edit markup and abstracts the form marshaling into the framework.

Intro to HTMX: Dynamic HTML without JavaScript

A no-go for me is having to learn a new language / syntax
and having code inside html attributes, e.g.
<code>_=&quot;on htmx:afterOnLoad set #txtTodo.value to ''&quot;</code>

HTMX is pretty cool. Overtime it will probably mature and have better features.