with-universal-configuration example errors

[michaeljonathanblack]

Examples bug report

https://github.com/zeit/next.js/tree/canary/examples/with-universal-configuration

Example name

with-universal-configuration

Describe the bug

mherold-mac:with-universal-configuration-app mherold$ yarn dev
yarn run v1.7.0
$ next
Error: .plugins[0][1] must be an object, false, or undefined
    at assertPluginItem (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/validation/option-assertions.js:157:15)
    at /Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/validation/option-assertions.js:134:14
    at Array.forEach (<anonymous>)
    at assertPluginList (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/validation/option-assertions.js:133:9)
    at /Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/validation/options.js:84:20
    at Array.forEach (<anonymous>)
    at validate (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/validation/options.js:62:21)
    at /Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/config-chain.js:141:36
    at cachedFunction (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/caching.js:40:17)
    at init (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/config-chain.js:122:12)
    at /Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/config-chain.js:206:17
    at buildRootChain (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/config-chain.js:85:20)
    at loadPrivatePartialConfig (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/partial.js:41:53)
    at loadPartialConfig (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/@babel/core/lib/config/partial.js:66:16)
    at babelConfig (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/next/dist/server/build/webpack.js:88:57)
    at _callee2$ (/Users/mherold/git/temp/with-universal-configuration-app/node_modules/next/dist/server/build/webpack.js:164:34)
error Command failed with exit code 1.

[michaeljonathanblack]

Irrespective of this error, I'd love an alternate path to defining our own environment variables at build time.

[teleginzhenya]

You should use commonjs modules in .babelrc.js. Don't forget to update babel-plugin-transform-define to 1.3.0

// .babelrc.js
const env = require("./env-config.js");

module.exports = {
  presets: ["next/babel"],
  plugins: [["transform-define", env]]
};

I'll make PR on this issue :)

[michaeljonathanblack]

You're lovely people, thank you!