On Fri, Nov 2, 2018 at 10:27 PM YJ <yang.ji...@celigo.com> wrote:
> Hi all,
>
> A shot in the dark but is there any way right now to disallow the use of
> dynamic es module import?
>
> In this snippet:
>
> let ns = await import("some-module");
>
> Instead of let ns become a rejected promise during run time, can I somehow
> make the usage of dynamic import a compile time error(or run time error, but
> throw an exception right away instead of returning a promise) ?
>
> Thanks
Short answer: you can't.
Longer answer: starting V8 with --noharmony_dynamic_import will
disable dynamic imports (at least, for as long as that flag stays
around) but won't turn import statements into compile-time errors,
they'll just be parsed as regular function call statements.
Throwing an exception from your HostImportModuleDynamicallyCallback
won't work either. V8 turns those into rejected promises.
Possible solution: pre-parse the source file with something like
Esprima and check for dynamic import statements by walking the AST?
You probably need to patch Esprima first because I don't think it
knows about dynamic imports right now.
I'm curious why you want to make it a hard error.
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