.eslintrc.js

const path = require('path');

module.exports = {
  parser: '@typescript-eslint/parser', // Specifies the ESLint parser
  plugins: ['@typescript-eslint', 'jest'],
  parserOptions: {
    project: './tsconfig.json',
  },
  extends: [
    'airbnb-base',
    'prettier',
    'plugin:@typescript-eslint/recommended', // Uses the recommended rules from the @typescript-eslint/eslint-plugin
    'plugin:jest/recommended',
    'prettier/@typescript-eslint', // Uses eslint-config-prettier to disable ESLint rules from @typescript-eslint/eslint-plugin that would conflict with prettier
  ],
  parserOptions: {
    ecmaVersion: 2018, // Allows for the parsing of modern ECMAScript features
    sourceType: 'module', // Allows for the use of imports
  },
  rules: {
    // Place to specify ESLint rules. Can be used to overwrite rules specified from the extended configs
    // e.g. "@typescript-eslint/explicit-function-return-type": "off",
    '@typescript-eslint/explicit-function-return-type': 'off',
    'jest/expect-expect': 'error',
    'jest/no-empty-title': 'warn',
    'jest/no-truthy-falsy': 'warn',
  },
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.js', '.ts'],
        paths: [path.resolve(__dirname, 'src')],
      },
    },
  },
  env: {
    'jest/globals': true,
  },
};