Describe the issue

In JSX, <button> refers to a built-in component, but <Button> to a user-defined one. This distinction is very important, and some syntax highlighters (including VS Code) style them with diffrent colors. I'd like to be able to do that as well, but I think this is not currently exposed from the highlighter.

My feature request is to expose this information so that I can configure the highlighter to style capital-letter-starting JSX tags (and their closing tags) differently. I'm not sure if that would require a breaking change.

Browser and platform

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Reproduction link

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