I'm submitting this issue as a small enhancement request, hoping it doesn't qualify as a request for a whole new language.

Since valid JSON5 is also valid JavaScript at the same time, the current JavaScript parser does a good job with highlighting it – better than JSON/JSONC.

I'm using highlight.js to enhance Markdown syntax highlighting within code fences, where users would be expected to annotate their code fences like this:

...and not tag them as javascript instead, just to get the content parsed correctly.

The solution you'd prefer / feature you'd like to see added...

A simple change to the alias list in javascript.js, which I'm prepared to submit myself.

Any alternative solutions you considered...

n/a