JavaScript modules—data for arbitrary module namespace identifier names

[Josh-Cena]

See tc39/ecma262#2154

This is already incorporated in MDN prose, but missing compact data. Support seems to be around V8 9.0.

[bergus]

https://bugzilla.mozilla.org/show_bug.cgi?id=1670044#c1 has some links

[queengooborg]

Hey @Josh-Cena -- where should the support for this feature be placed in BCD, would you say?

[Josh-Cena]

My opinion would be a subfeature of import and export, but honestly it would be much easier if we have a separate feature called "modules" where we can put subfeatures like import attributes and this one, since all these features require updates to every module-related syntax,