My ideal HTML and CSS

Any property and content can be imported as a URL, such as <p innertext = "http://xxxxxx.com/content.txt%22%3E%3C/p>

Resources requested by all pages can be pre-loaded. predictable resources can be obtained from the browser in an HTTP request.

Style is no longer used as an attribute or tag, but as a page description rendering File Import-for different devices, the server can decide what type of style sheet to return, even if it is used for voice browsers for blind people, it can also return a file such as the description of sentence breaking and re-reading, rather than the static CSS, which realizes the real expression and semantic separation.

Style sheet can be embedded into scripts, which is similar to expression but not so disgusting. style sheet can also control all interactions, such as onclick, hover, mousein, and mouseout.

Different CSS measurement units can calculate each other, for example, width: 300px- 1cm + 10%.

Style sheet can control all the behavior of tags: Even SVG can be used to completely control the label shape.

Videos and audios are only things at the style sheet level.

<Ball/> you can use style sheet to display a 3D sphere.

The script is no longer embedded in HTML as a tag, but an independent file describing interaction. It provides the ability to load scripts synchronously in the script.