.eslintrc.cjs

// eslint-disable-next-line no-undef
module.exports = {
  root: true,
  extends: [
    'eslint:recommended',
    'plugin:prettier/recommended',
    'plugin:@typescript-eslint/eslint-recommended', // Uses the recommended rules from the @typescript-eslint/eslint-plugin
    'plugin:@typescript-eslint/recommended', // Uses the recommended rules from the @typescript-eslint/eslint-plugin
    'prettier', // Uses eslint-config-prettier to disable ESLint rules from @typescript-eslint/eslint-plugin that would conflict with prettier
  ],
  parser: '@typescript-eslint/parser', // Specifies the ESLint parser
  env: {
    browser: true,
    es6: true,
    jest: true,
    node: true,
  },
  parserOptions: {
    ecmaVersion: 2020, // Allows for the parsing of modern ECMAScript features
    sourceType: 'module', // Allows for the use of imports
    ecmaFeatures: {
      jsx: true, // Allows for the parsing of JSX
      arrowFunctions: true,
    },
    // Next two lines enable deeper TS type checking
    // https://typescript-eslint.io/docs/linting/typed-linting/
    tsconfigRootDir: __dirname,
  },
  plugins: ['@typescript-eslint', 'prettier'],
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.js', '.svelte', '.ts', '.tsx'],
        paths: ['./src'],
      },
    },
  },
  rules: {
    // Existing rules
    'comma-dangle': 'off', // https://eslint.org/docs/rules/comma-dangle
    'function-paren-newline': 'off', // https://eslint.org/docs/rules/function-paren-newline
    'global-require': 'off', // https://eslint.org/docs/rules/global-require
    'import/no-dynamic-require': 'off', // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-dynamic-require.md
    'class-methods-use-this': 'off',
    '@typescript-eslint/no-unused-vars': [
      'error',
      { varsIgnorePattern: '^_', argsIgnorePattern: '^_' },
    ],
    'import/prefer-default-export': 'off',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/no-var-requires': 'off',
    '@typescript-eslint/ban-ts-comment': 'off',
    'no-console': ['error', { allow: ['error', 'warn'] }],
    'padding-line-between-statements': [
      'error',
      {
        blankLine: 'always',
        next: 'return',
        prev: '*',
      },
      {
        blankLine: 'always',
        next: 'export',
        prev: '*',
      },
      {
        blankLine: 'always',
        next: 'multiline-block-like',
        prev: '*',
      },
      {
        blankLine: 'always',
        next: '*',
        prev: 'multiline-block-like',
      },
      {
        blankLine: 'any',
        next: 'export',
        prev: 'export',
      },
    ],
    '@typescript-eslint/explicit-member-accessibility': 'error',
    eqeqeq: 'error',
    'no-unused-expressions': [
      'error',
      { allowShortCircuit: true, allowTaggedTemplates: true },
    ],
    // This has a bug, so we use typescripts version
    'no-shadow': 'off',
    '@typescript-eslint/no-shadow': ['error'],
    '@typescript-eslint/no-non-null-assertion': 'off',
    'no-eval': 'error',
    'no-implied-eval': 'error',
    '@typescript-eslint/member-ordering': 'error',
  },
};