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errors.js
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errors.js
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module.exports = {
rules: {
// require trailing commas in multiline object literals
'comma-dangle': ['error', {
arrays: 'always-multiline',
objects: 'always-multiline',
imports: 'always-multiline',
exports: 'always-multiline',
functions: 'always-multiline',
}],
// Disallow await inside of loops
// http://eslint.org/docs/rules/no-await-in-loop
'no-await-in-loop': 'error',
// disallow assignment in conditional expressions
'no-cond-assign': ['error', 'always'],
// disallow use of console
'no-console': 'warn',
// disallow use of constant expressions in conditions
'no-constant-condition': 'warn',
// disallow control characters in regular expressions
'no-control-regex': 'error',
// disallow use of debugger
'no-debugger': 'error',
// disallow duplicate arguments in functions
'no-dupe-args': 'error',
// disallow duplicate keys when creating object literals
'no-dupe-keys': 'error',
// disallow a duplicate case label.
'no-duplicate-case': 'error',
// disallow empty statements
'no-empty': 'error',
// disallow the use of empty character classes in regular expressions
'no-empty-character-class': 'error',
// disallow assigning to the exception in a catch block
'no-ex-assign': 'error',
// disallow double-negation boolean casts in a boolean context
// http://eslint.org/docs/rules/no-extra-boolean-cast
'no-extra-boolean-cast': 'error',
// disallow unnecessary parentheses
// http://eslint.org/docs/rules/no-extra-parens
'no-extra-parens': ['off', 'all', {
conditionalAssign: true,
nestedBinaryExpressions: false,
returnAssign: false,
}],
// disallow unnecessary semicolons
'no-extra-semi': 'error',
// disallow overwriting functions written as function declarations
'no-func-assign': 'error',
// disallow function or variable declarations in nested blocks
'no-inner-declarations': 'error',
// disallow invalid regular expression strings in the RegExp constructor
'no-invalid-regexp': 'error',
// disallow irregular whitespace outside of strings and comments
'no-irregular-whitespace': 'error',
// disallow the use of object properties of the global object (Math and JSON) as functions
'no-obj-calls': 'error',
// disallow use of Object.prototypes builtins directly
// http://eslint.org/docs/rules/no-prototype-builtins
'no-prototype-builtins': 'error',
// disallow multiple spaces in a regular expression literal
'no-regex-spaces': 'error',
// disallow sparse arrays
'no-sparse-arrays': 'error',
// Disallow template literal placeholder syntax in regular strings
// http://eslint.org/docs/rules/no-template-curly-in-string
'no-template-curly-in-string': 'error',
// Avoid code that looks like two expressions but is actually one
// http://eslint.org/docs/rules/no-unexpected-multiline
'no-unexpected-multiline': 'error',
// disallow unreachable statements after a return, throw, continue, or break statement
'no-unreachable': 'error',
// disallow return/throw/break/continue inside finally blocks
// http://eslint.org/docs/rules/no-unsafe-finally
'no-unsafe-finally': 'error',
// disallow negating the left operand of relational operators
// http://eslint.org/docs/rules/no-unsafe-negation
'no-unsafe-negation': 'error',
// disallow negation of the left operand of an in expression
// deprecated in favor of no-unsafe-negation
'no-negated-in-lhs': 'off',
// disallow comparisons with the value NaN
'use-isnan': 'error',
// ensure JSDoc comments are valid
// http://eslint.org/docs/rules/valid-jsdoc
'valid-jsdoc': 'off',
// ensure that the results of typeof are compared against a valid string
// http://eslint.org/docs/rules/valid-typeof
'valid-typeof': ['error', { requireStringLiterals: true }],
}
};