Support remote sourceMap about node

[legendecas]

I think this should be enabled with a separate flag or with custom loaders, e.g. some flags like --experimental-network-imports. This would allow network access through JavaScript comments (magic source map comments) and introduce differences in application stability and security concerns.

similar https://issues.chromium.org/issues/40060207

File URL as source mapping url is already supported at the moment. Additionally, the current security model defines that user scripts on the file system are trusted so I don't think this issue is related to the requested feature.

[himself65]

similar https://issues.chromium.org/issues/40060207

[legendecas]

I think this can be integrated with the flag --experimental-network-imports because with that flag, the sources are generally loaded from the network and their source maps need to be loaded from the network as well.

Quick prototyping with a custom loader: https://github.com/legendecas/network-source-maps-loader. Ultimately, I think a new optional phase can be introduced to load source maps with V8 parsed source map magic comments to avoid regexp matching and string concatenation in the loaders.