Svelte project with babel-runtime with core-js3

[washanhanzi]

I am using bebel-runtime with core-js3 to polyfill a svelte project, snowpack report a warning:

[esinstall] To preserve the export signature of the entry module "node_modules/core-js-pure/stable/instance/for-each.js", an empty facade chunk was created. This often happens when creating a bundle for a web app where chunks are placed in script tags and exports are ignored. In this case it is recommended to set "preserveEntrySignatures: false" to avoid this and reduce the number of chunks. Otherwise if this is intentional, set "preserveEntrySignatures: 'strict'" explicitly to silence this warning.

However I don't know where to set the preserveEntrySignatures.

I think this may lead to a bug which I'm facing:

Uncaught SyntaxError: The requested module '/_snowpack/pkg/core-js-pure.stable.instance.for-each.v3.16.0.js' does not provide an export named 'default'