Compile error due to .mjs missing from resolve.extensions

[msheakoski]

After upgrading to Encore 0.21, I received the error below. I was able to resolve it with:

const config = Encore.getWebpackConfig();
config.resolve.extensions.unshift(".mjs");

but this should really be added by default since webpack adds it by default

$ encore dev
Running webpack ...

 ERROR  Failed to compile with 175 errors                                                                           8:01:37 PM

 error  in ./node_modules/graphql/index.mjs

Can't reexport the named export 'BREAK' from non EcmaScript module (only default export is available)

 error  in ./node_modules/graphql/index.mjs

Can't reexport the named export 'BreakingChangeType' from non EcmaScript module (only default export is available)

 error  in ./node_modules/graphql/index.mjs

[stof]

not having the .wasm, .mjs and .json extensions that webpack 4 has by default is indeed something we should fix here. I think webpack 3 had only .js by default, so the code adding the extra extensions was fine at that time, but it is not anymore.

[weaverryan]

Makes sense - let's fix this!