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HTML might be getting a new type of tag, which… hasn't happened this millennium. Here's the new syntax, and how it works:

Christoph Päper

@crissov.de

17 Feb

Doesn’t harm to link to more of the relevant issues and explainers here, I guess.

github.com[css-highlight-api] Use marker nodes to declaratively annotate highlights · Issue #13381 · w3c/csswg-draftsAn emerging feature in HTML, out of order streaming, is converging towards creating a new node type called "marker", currently proposed as something like: <!mark name="some-void-range"> <!start nam...

Christoph Päper

@crissov.de

17 Feb

By the way, besides that issue I learned of these plans after becoming curious about this Intent to Prototype by Blink:

IntentToShip@intenttoship.dev

Blink: Intent to Prototype: Parse processing instructions in HTML

groups.google.comBlink: Intent to Prototype: Parse processing instructions in HTMLBlink: Intent to Prototype: Parse processing instructions in HTML

Christoph Päper

@crissov.de

I vaguely remember a thread in the early stages of HTML5 discussions and WHATWG formation that dealt with comment syntax, e.g. about the SGML rule that allowed `` in theory and how to handle stuff like `<!>`, which I had been using as a Todo marker.

17/2/26, 10:47 am0 reposts1 like

Firefox for Web Developers

@webdevs.firefox.com

17 Feb

The early marker proposal was <!marker>, since that also parses as a comment, but it was changed to <?marker> for XML compat.