.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  plugins: [
    // All packages in this monorepo use TypeScript
    '@typescript-eslint',
    // All packages in this monorepo use Prettier
    'prettier',
    // We enforce certain rules on how imports are handled
    'import'
  ],
  extends: [
    'eslint:recommended',
    'plugin:prettier/recommended',
    'plugin:import/errors',
    'plugin:import/warnings',
    'plugin:import/typescript'
  ],
  rules: {
    'no-self-compare': 'error',
    'import/order': [
      1,
      {
        groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
        'newlines-between': 'always'
      }
    ],
    /**
     * The default setting for Prettier is 'warn' because then it shows as yellow squiggly lines
     * in the VS Code IDE. However, it means `eslint` will not have an error code if there is warning
     * due to prettier unles you also add the `--max-warnings=0` flag in front of it. So, in the `lint-staged`
     * scripts in the packages within this monorepo, we add that flag so that the precommit hooks
     * associated with that script will fail when run.
     */
    'prettier/prettier': 'warn'
  },
  overrides: [
    {
      files: ['**/*.ts'],
      extends: ['plugin:@typescript-eslint/recommended']
    }
  ]
};