.eslintrc.js

module.exports = {
  root: true,
  env: {
    browser: true,
    es6: true,
    mocha: true,
    node: true,
  },
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended',
    'prettier',
  ],
  plugins: ['@typescript-eslint', 'prettier', 'mocha'],
  rules: {
    'prettier/prettier': 'error',

    // delete in the future?
    '@typescript-eslint/no-explicit-any': 'off',

    // I really don't understand the merit of this
    '@typescript-eslint/no-empty-function': 'off',

    // custom
    'array-bracket-spacing': ['error', 'never'],

    // default
    'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
  },
  overrides: [
    {
      // Config files in the root of the project
      files: ['!*/**'],
      env: {
        node: true,
      },
      rules: {
        '@typescript-eslint/no-var-requires': 'off',
      },
    },
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    sourceType: 'module',
    ecmaVersion: 2019,
    project: './tsconfig.lint.json',
  },
}