How to train phpStorm to highlight class in html on double click?

Question

css

How to teach phpstorm to double click the entire class name when the class is written like this: name-of-class ?
If the class is written through the underscore name_of_class, then everything is highlighted as it should. GIF example.

This only occurs if the file name is distinct from .html, such as .php.
There is no such problem in file.html, but there is a problem in file.php.