Hey all! I think I've found a bug in the JS syntax highlighting that causes it to break when using string interpolation with more than 2 insertions:

broken => `a: ${a}, b: ${b}, c: ${c}`
                                   ^ this character doesnt close opening pair

This causes all of the code after that brace to be highlighted red. Interestingly if you put a second brace after the one that fails to close the pair, that fixes the syntax highlighting problem but of course gives an erroneous character in the output.