eslint-config-vaadin/rules/eslint/possible-problems.js

Vaadin base JS/TS ESLint config

export const noUseBeforeDefineOptions = { classes: true, functions: true, variables: true };
const rules = {
    'array-callback-return': 'error',
    'constructor-super': 'error',
    'for-direction': 'error',
    'getter-return': 'error',
    'no-async-promise-executor': 'error',
    'no-await-in-loop': 'error',
    'no-class-assign': 'error',
    'no-compare-neg-zero': 'error',
    'no-cond-assign': ['error', 'except-parens'],
    'no-const-assign': 'error',
    'no-constant-binary-expression': 'error',
    'no-constant-condition': 'error',
    'no-constructor-return': 'error',
    'no-control-regex': 'error',
    'no-debugger': 'error',
    'no-dupe-args': 'error',
    'no-dupe-class-members': 'error',
    'no-dupe-else-if': 'error',
    'no-dupe-keys': 'error',
    'no-duplicate-case': 'error',
    // handled by "import/no-duplicates"
    'no-duplicate-imports': 'off',
    'no-empty-character-class': 'error',
    'no-empty-pattern': 'error',
    'no-ex-assign': 'error',
    // use "no break" comment to describe that there shouldn't be break
    'no-fallthrough': ['error', { commentPattern: '^no\\sbreak' }],
    'no-func-assign': 'error',
    'no-import-assign': 'error',
    'no-inner-declarations': 'error',
    'no-invalid-regexp': ['error', { allowConstructorFlags: ['u', 'y'] }],
    'no-irregular-whitespace': 'error',
    'no-loss-of-precision': 'error',
    'no-misleading-character-class': 'error',
    'no-new-native-nonconstructor': 'error',
    // handled by "no-new-native-nonconstructor"
    'no-new-symbol': 'off',
    'no-obj-calls': 'error',
    'no-promise-executor-return': 'error',
    'no-prototype-builtins': 'error',
    'no-self-assign': ['error', { props: true }],
    'no-self-compare': 'error',
    'no-setter-return': 'error',
    'no-sparse-arrays': 'error',
    'no-template-curly-in-string': 'error',
    'no-this-before-super': 'error',
    'no-unassigned-vars': 'error',
    'no-undef': 'error',
    // handled by Prettier
    'no-unexpected-multiline': 'off',
    'no-unmodified-loop-condition': 'error',
    'no-unreachable': 'error',
    'no-unreachable-loop': 'error',
    'no-unsafe-finally': 'error',
    'no-unsafe-negation': 'error',
    'no-unsafe-optional-chaining': ['error', { disallowArithmeticOperators: true }],
    'no-unused-private-class-members': 'error',
    'no-unused-vars': [
        'error',
        {
            args: 'all',
            argsIgnorePattern: '^_',
            caughtErrors: 'all',
            caughtErrorsIgnorePattern: '^_',
            ignoreRestSiblings: true,
            vars: 'all',
            varsIgnorePattern: '^_',
        },
    ],
    'no-use-before-define': ['error', noUseBeforeDefineOptions],
    // TODO: enable when eslint v9 is adopted
    'no-useless-assignment': 'off',
    'no-useless-backreference': 'error',
    // appears to be too problematic to use
    'require-atomic-updates': 'off',
    'use-isnan': 'error',
    'valid-typeof': ['error', { requireStringLiterals: false }],
};
export default rules;
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