Module type

ES Lint

Set the type to ES module in the config.

• `.eslintrc.json

    {
      "parserOptions": {
        "sourceType": "module"
      }
    }
  

Based on answer on the ESLint repo’s issues.

ESLint cannot figure out the type from here:

• package.json

    {
      "type": "module"
    }
  

Or at least not in my testing with multiple packages in one and no root package.json.

Prettier

ESLint defaults to ES5 syntax-checking. So it rejects const and import keywords.

Here you can support modern JavaScript.

• .eslintrc.json

    {
        "parserOptions": {
            "ecmaVersion": 2017
        },
  
        "env": {
            "es6": true
        }
    }