.eslintrc.js

module.exports = {
    parser: '@typescript-eslint/parser', // Specifies the ESLint parser
    parserOptions: {
        ecmaVersion: 2019, // 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
        'prettier/@typescript-eslint', // Uses eslint-config-prettier to disable ESLint rules from @typescript-eslint/eslint-plugin that would conflict with prettier
        'plugin:prettier/recommended', // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
    ],
    plugins: ['jest'],
    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/no-unused-vars': ['error', { argsIgnorePattern: '_' }],
        'jest/no-disabled-tests': 'warn',
        'jest/no-focused-tests': 'error',
        'jest/no-identical-title': 'error',
        'jest/prefer-to-have-length': 'warn',
        'jest/valid-expect': 'error',
    },
};