Why isn’t there a HTML / JS / CSS / Jinja Card which allows us to create easily rich Lovelace Cards to create own layouts and compilations with conditional styling of elements without having to install HACS Components.
Imho this is a question to custom card’s developers, not to HA developers…
I was also thinking about something similar. For now you can use custom grid layout card or custom button card to compose your own card out of other cards or, probably the most similar to what you want to achieve is : Frontpage - Swiss Army Knife Card. For now upvoting!
A markdown card is probably the closest you get.
I regularly use it with CSS, HTML and lots of Jinja2.
JS is a bit trickier, since the companion app is also a browser, but with I think the feature set is limited a bit by the way it is used in the app.
Thanks for letting me know, tbh. I actually didn’t find any good information about the markdown card. In regards what is possible and useable in regards of css and html. Is there any documentation about what set of instructions from html and css is useable?
I have mostly use font, colors and tables.
I have no idea how much can be done, because it include several other specifications too and I think the html and CSS is part of just the markdown specification.