Description
ES imports and exports can only be used at the top level of a module. This is illegal:
function container() {
import 'fs'
export { container }
namespace N { }
}The current errors for these three statements are vague and, for JS, contain irrelevant terms:
Actual:
(1) "An import declaration can only be used in a namespace or module."
(2) "An export declaration can only be used in a module."
(3) "A namespace declaration is only allowed in a namespace or module."
Expected:
(1) When the node is in a JS file, "An import declaration can only be used at the top level of a module."
Otherwise, "An import declaration can only be used at the top level of a namespace or module."
(2) When the node is in a JS file, "An export declaration can only be used at the top level of a module."
Otherwise, "An export declaration can only be used at the top level of a namespace or module."
(3) "A namespace declaration is only allowed at the top level of a module."
Implementation:
checkGrammarModuleElementContext issues these errors. I don't know whether it's better to make it smarter or just avoid calling it for case (1).