This article is not about the negative aspects of HTML but about that other dark side of HTML that is called shadow DOM . If you are a frontend developer and you have never heard about shadow DOM then you should definitely keep reading because you are missing some cool stuff about webdevelopment.
What is DOM?
So what is shadow DOM?
So is there no way to style the slider buttons then? Depends, as developer you can allow them to be styled by associating them with a pseudo-element and then style them using a pseudo attribute. For some examples how to do this look and for more information take a look at the links below.