mjs files EcmaScript module

[abstraktion-io]

Can't fix the Can't reexport the named export 'xxx' from non EcmaScript module (only default export is available) even with vue.config.js to handle .mjs , any suggestion please ? :)

[Travis Reynolds]

Try adding it to the Gridsome config instead:
gridsome.config.js

module.exports = {
  // ...
  configureWebpack: {
    module: {
      rules: [ // fixes https://github.com/graphql/graphql-js/issues/1272
        {
          test: /\.mjs$/,
          include: /node_modules/,
          type: 'javascript/auto'
        }
      ]
    }
  },
  // ...
}