.eslintrc.js

module.exports = {
  env: {
    jest: true,
    browser: true,
    es2021: true,
  },
  plugins: ['@typescript-eslint', 'import'],
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'plugin:import/errors',
    'plugin:import/warnings',
  ],
  settings: {
    'import/resolver': {
      node: {
        paths: ['src'],
        extensions: ['.js', '.ts'],
      },
      typescript: {
        paths: ['src'],
        extensions: ['.js', '.ts'],
      },
    },
  },
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 'latest',
    sourceType: 'module',
    project: './tsconfig.json',
  },
  ignorePatterns: ['.eslintrc.js', '*.spec.ts'],
  rules: {
    // sometimes we are sure it is not null
    '@typescript-eslint/no-non-null-assertion': 'off',
  },
};