[ruthmarx]

Why isn't it being assembled as HTML that can be viewed in document inspector or via viewing source? Ht HTML that extensions inspect shows up. If it is assembled to be rendered, why isn't it available anywhere else in the browser to view?

[jansan]

It's using CSS, specifically the `content` property. You can use developer tools in Firefox to inspect it.

[kroltan]

And to spell it out:

- Stylesheet encoded as base64 in the Link header;

- Browsers always implicitly have at least the html and body tags;

- CSS cannot create new elements, but it does get 2 free pseudo-elements per actual element, ::before and ::after;

- CSS can set textual content for pseudo-elements;

So, it sets content to a pseudo element of an implicitly created tag, that's why the page is so minimal.

(Well, it could be up to 4 times as complicated I think, by using the other 3 pseudo-elements. Or cheat by using a big SVG as a background-image with more complex contents, but then you start running into header size limits and whatnot)

[ruthmarx]

ah, thanks!