eruby html syntax highlighting

[amerov]

I use https://github.com/othree/html5.vim for html.
.erb highlighting is strange

[AndrewRadev]

Oddly enough, for me it's the other way around, sort of. With the plugin you link to, the "data-user" renders correctly, both in erb and html, as htmlArg. Without it, the -user part highlights as htmlTag instead.

One thing to check is your iskeyword and syn iskeyword settings. Try these commands in an eruby and html buffer:

:set iskeyword
:syn iskeyword

You could also try installing this plugin: https://github.com/vim-scripts/SyntaxAttr.vim. With it, calling :call SyntaxAttr() will give you information about the syntax group under the cursor.

Even with that, I'm not sure if we'll be able to fix the issue, but it's a start to at least maybe figure out what might be wrong.

[amerov]

fixed it by adding autocmd BufRead,BufNewFile *.html.erb set filetype=eruby.html

[AndrewRadev]

Hm, that's interesting. I wonder if that doesn't override eruby syntax somehow. Well, either way, does that mean this issue can be closed?

[tpope]

First things first, one problem is that https://github.com/othree/html5.vim adds hyphen to 'iskeyword'. This is fundamentally incompatible with not just Ruby (and thus ERB) but also embedded JavaScript, and possibly CSS too. Thus, I'd argue that this HTML syntax file has a fundamental design flaw.

But I'm not even sure that's the actual problem. While I can reproduce your ERB example, I can't reproduce your success with the plain HTML filetype. I can also produce a match with datafoo-bar=, which is invalid as I understand the HTML spec. Clearly, this particular HTML syntax file has issues.