.eslintrc.js

// https://eslint.org/docs/latest/use/configure/

module.exports = {
  root: true,
  env: { es2022: true, browser: true, node: true },
  // Standard linting for pure javascript files
  extends: [
    'eslint:recommended',
    // Disables all style rules (must always be put last, so it overrides anything before it)
    // https://prettier.io/docs/en/integrating-with-linters.html
    // https://github.com/prettier/eslint-config-prettier
    'prettier',
  ],
  overrides: [
    // TypeScript linting for TypeScript files
    {
      files: '*.ts',
      plugins: [
        '@typescript-eslint',
        // https://tsdoc.org/
        'eslint-plugin-tsdoc',
      ],
      parser: '@typescript-eslint/parser',
      parserOptions: { project: 'tsconfig.eslint.json' },
      extends: [
        'plugin:@typescript-eslint/recommended-type-checked',
        'prettier',
      ],
      rules: {
        'tsdoc/syntax': 'error',
        // @TODO: Remove the ones between "~~", adapt code
        // ~~
        '@typescript-eslint/prefer-as-const': 'off',
        '@typescript-eslint/ban-ts-comment': 'off',
        '@typescript-eslint/no-unsafe-call': 'off',
        '@typescript-eslint/no-unsafe-member-access': 'off',
        '@typescript-eslint/no-unsafe-return': 'off',
        '@typescript-eslint/no-unsafe-assignment': 'off',
        '@typescript-eslint/no-unsafe-argument': 'off',
        '@typescript-eslint/no-floating-promises': 'off',
        // ~~
        '@typescript-eslint/array-type': ['warn', { default: 'array-simple' }],
        // @TODO: Should be careful with this rule, should leave it be and disable
        //       it within files where necessary with explanations
        '@typescript-eslint/no-explicit-any': 'off',
        '@typescript-eslint/no-unused-vars': [
          'error',
          // argsIgnorePattern: https://eslint.org/docs/latest/rules/no-unused-vars#argsignorepattern
          // varsIgnorePattern: https://eslint.org/docs/latest/rules/no-unused-vars#varsignorepattern
          { args: 'all', argsIgnorePattern: '^_', varsIgnorePattern: '^_' },
        ],
        // @TODO: Not recommended to disable rule, should instead disable locally
        //       with explanation
        '@typescript-eslint/ban-ts-ignore': 'off',
      },
    },
    // Jest linting for test files
    {
      files: 'tests/*.ts',
      plugins: ['jest'],
      env: {
        // @TODO: Jasmine is not meant to be used in Jest tests,
        //       there's even a rule for it in plugin:jest/recommended
        jasmine: true,
        jest: true,
        'jest/globals': true,
      },
      extends: ['plugin:jest/recommended', 'prettier'],
      // @TODO: Remove all of these rules and adapt code!
      rules: {
        'jest/no-disabled-tests': 'off',
        'jest/expect-expect': 'off',
        'jest/no-conditional-expect': 'off',
        'jest/valid-title': 'off',
        'jest/no-jasmine-globals': 'off',
        'jest/valid-expect-in-promise': 'off',
        'jest/valid-expect': 'off',
        'jest/no-alias-methods': 'off',
      },
    },
  ],
};