.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser', // Specifies the ESLint parser
  parserOptions: {
    ecmaVersion: 'latest', // Allows for the parsing of modern ECMAScript features
    sourceType: 'module', // Allows for the use of imports
  },
  extends: [
    'plugin:@typescript-eslint/recommended', // Uses the recommended rules from the @typescript-eslint/eslint-plugin
    'plugin:prettier/recommended',
  ],

  plugins: ['simple-import-sort'],

  rules: {
    'prettier/prettier': [
      'error',
      {
        endOfLine: 'auto',
      },
    ],

    // import sorting
    'simple-import-sort/imports': 'error',
    'simple-import-sort/exports': 'error',

    // disallow else after a return in an if
    'no-else-return': ['error', { allowElseIf: false }],

    // disallow use of assignment in return statement
    'no-return-assign': ['error', 'always'],

    // Prefer destructuring from arrays and objects
    'prefer-destructuring': [
      'error',
      {
        VariableDeclarator: {
          array: false,
          object: true,
        },
        AssignmentExpression: {
          array: true,
          object: false,
        },
      },
      {
        enforceForRenamedProperties: false,
      },
    ],

    // disallow unnecessary constructor
    'no-useless-constructor': 'error',

    // disallow use of console statements (except for console.error)
    'no-console': ['warn', { allow: ['error'] }],

    // disallow the unary operators ++ and --
    'no-plusplus': ['warn', { allowForLoopAfterthoughts: true }],

    // require the use of === and !==
    eqeqeq: ['error', 'always', { null: 'ignore' }],
  },

  ignorePatterns: ['dist/', '.eslintrc.js'], // Avoid linting on the dist folder and, ironically, this file too
};