Is it possible to have a comment inside a es6 Template-String?

Question

Let\'s say we have a multiline es6 Template-String to describe e.g. some URL params for a request:

const fields = `
    id,
    message,
    created_time,
           


        

Answer 1

No.

That syntax is valid, but will just return a string containing \n// post id\nid, rather than removing the comments and creating a string without them.

If you look at §11.8.6 of the spec, you can see that the only token recognized between the backtick delimiters is TemplateCharacters, which accepts escape sequences, line breaks, and normal characters. In §A.1, SourceCharacter is defined to be any Unicode point (except the ones excluded in 11.8.6).