Not properly highlighting HTML attributes in (...) syntax

[janko]

Most standard ones are properly highlighted, but arbitrary ones aren't. Is it possible to just highlight all the attributes the same, regardless of their name (like it is in native HTML tags)?

[tpope]

The native HTML highlighting uses 2 different colors. If you want to implement that for Haml, go for it. But that effort might be better expended on just fixing the HTML syntax highlighting to support HTML 5.

[janko]

Hmm, I added otree/html5.vim to my vimfiles, which, judging by its source code, should take care of all of this, but for some reason it doesn't. I tried opening a normal HTML file and zSing over a data-* attribute returns htmlArg htmlTag; however, in a Haml file zSing over a data-* attribute returns only hamlAttributes (while other normal ones return also htmlArg).

Do you have any idea what could be wrong? I double-checked with :Scriptnames if html5.vim's syntax/html.vim was loaded.

[tpope]

You need to :set iskeyword+=-. Try it in an after file and see how well it works. I'm worried it will have serious side effects for the Ruby

[tpope]

See othree/html5.vim#5 for a way to contribute a more promising solution.

[janko]

Wow, thank you for putting your time into this. Hmm, I still don't get why data-* attributes don't work if there is

syn match   htmlArg "\<\(data\(\-[a-z]\+\)\+\)\=\>" contained

It shouldn't be dependend on the iskeyword, right?

The solution that worked for me was adding an after/syntax/html.vim:

runtime! syntax/html/aria.vim
runtime! syntax/html/rdfa.vim

set iskeyword+=-

I don't think it messes with the Ruby highlighting, only if _ is removed as an iskeyword.

[janko]

I think I will submit a pull request to merge html/aria.vim and html/rdfa.vim into html.vim. Also, I found the need to :set iskeyword+=- alarming at first, but now I don't really see any downsides.

[tpope]

Because data by itself highlights as a keyword, and keywords have higher precedence than matches.

[janko]

Aaaa, I get it. Thank you for all your help, I really have much deeper understanding of the problem now, and I can act by myself now.