Module Federation with Library Type Module (ESM) is not working

[saravanan10393]

Bug report

What is the current behavior?
When setting

    new ModuleFederationPlugin({
      name: "app1",
      filename: "remoteEntry.js",
      library: {
        type: "module"
      },
      remotes: {
        app2: "http://127.0.0.1:3002/remoteEntry.js",
      },
      exposes: {
        "./Button": "./src/Button",
      }
    })

in module federation plugin config, the generate remote entry is not exporting anything. Or simply saying, consuming remote is not working.

If the current behavior is a bug, please provide the steps to reproduce.

(https://github.com/saravanan10393/mf-es-module)[Here is the reproduce repo] also (https://gist.github.com/saravanan10393/8185ef0a3e56f9419bbc5a299815aad4)[here is the generated removeEntry of app1.]

What is the expected behavior?
The remoteEntry with ESM target support is needed.

Other relevant information:
webpack version: 5.51.1
Node.js version: 14
Operating System: Mac
Additional tools:

[saravanan10393]

@sokra any idea on this

[ckken]

i fine when use es5

is work, when use ES2015

the library is change~ and load failed

[rakshans1]

@ckken Try setting library.type to window

    new ModuleFederationPlugin({
      name: 'app',
      filename: 'remoteEntry.js',
      remotes: {},
      exposes: {
        './App': './app.js',
      },
      shared: sharedDependencies,
      library: {
        type: 'window',
        name: 'app',
      },
    }),

[alexander-akait]

Fixed #14827

[ckken]

no work also in 5.64.4 when build bundle

[alexander-akait]

Please create reproducible test repo

[ckken]

Are there any simple demos? My cases are more complex

[ckken]

Maybe I set it wrong

[alexander-akait]

That is why I asked repo, you do not need to provide the entire project, cut it to reproduce repo

[ckken]

https://github.com/saravanan10393/mf-es-module it work! thanks

[alexander-akait]

It works with ESM? So I don't need to check it?

[ckken]

work well!

[erickbelfy]

Is there a place or documentation where I can see all the library types? I'm passing through the same problem above, with same configuration, but I can't find a place where there's a detailed explanation of library types.

[alexander-akait]

You can open an issue in our docs and we will try to improve

[wibed]

i still expirience this issue:

issue including reproduction,
module-federation/module-federation-examples#3108