.eslintrc.js

module.exports = {
  env: {
    browser: false,
    es2021: true,
    mocha: true,
    node: true,
  },
  plugins: ['@typescript-eslint', 'import'],
  extends: [
    'standard',
    'plugin:prettier/recommended',
    'plugin:@next/next/recommended',
    'plugin:import/typescript',
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 12,
  },
  rules: {
    'node/no-unsupported-features/es-syntax': [
      'error',
      { ignores: ['modules'] },
    ],
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never',
      },
    ],
  },
  settings: {
    'import/extensions': ['.ts', '.tsx'],
    'import/parsers': {
      '@typescript-eslint/parser': ['.ts', '.tsx'],
    },
    'import/resolver': {
      node: {
        extensions: ['.ts', '.tsx'],
      },
    },
  },
}