.eslintrc.js

module.exports = {
    root: true,
    parser: '@typescript-eslint/parser',
    parserOptions: {
        ecmaVersion: 2020,
        sourceType: 'module',
        ecmaFeatures: {
            jsx: false
        }
    },
    env: {
        browser: true,
        node: true
    },
    plugins: ['@typescript-eslint', 'jest'],
    extends: [
        'eslint:recommended',
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended',
        'prettier/@typescript-eslint'
    ],
    ignorePatterns: ['/node_modules/', '/coverage/', '/dist/'],
    rules: {
        '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',
        '@typescript-eslint/explicit-function-return-type': [
            'error',
            {
                allowExpressions: true
            }
        ],
        '@typescript-eslint/interface-name-prefix': 'off',
        '@typescript-eslint/no-unused-vars': ['error', {argsIgnorePattern: '^_'}]
    }
};