bugs.js

"use strict";

module.exports = {
  rules: {
    // require corresponding getters for any setters
    "accessor-pairs": "error",

    // treat var statements as if they were block scoped
    "block-scoped-var": "error",

    // verify calls of super() in constructors
    "constructor-super": "error",

    // require the use of === and !==
    eqeqeq: "error",

    // make sure for-in loops have an if statement
    "guard-for-in": "error",

    // disallow use of the Array constructor
    "no-array-constructor": "error",

    // disallow use of bitwise operators
    "no-bitwise": "error",

    // disallow assignment in conditional expressions
    "no-cond-assign": "error",

    // disallow control characters in regular expressions
    "no-control-regex": "error",

    // disallow use of debugger
    "no-debugger": "error",

    // disallow deletion of variables
    "no-delete-var": "error",

    // disallow division operators explicitly at beginning of regular expression
    "no-div-regex": "error",

    // disallow duplicate argument names in functions
    "no-dupe-args": "error",

    // disallow duplicate keys when creating object literals
    "no-dupe-keys": "error",

    // disallow duplicate case labels
    "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 comparisons to null without a type-checking operator
    "no-eq-null": "error",

    // disallow adding to native types
    "no-extend-native": "error",

    // disallow unnecessary function binding
    "no-extra-bind": "error",

    // disallow double-negation boolean casts in a boolean context
    "no-extra-boolean-cast": "error",

    // disallow unnecessary semicolons
    "no-extra-semi": "error",

    // disallow fallthrough of case statements
    "no-fallthrough": "error",

    // disallow the use of leading or trailing decimal points in numeric literals
    "no-floating-decimal": "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 usage of __iterator__ property
    "no-iterator": "error",

    // disallow labels that share a name with a variable
    "no-label-var": "error",

    // disallow unnecessary nested blocks
    "no-lone-blocks": "warn",

    // disallow creation of functions within loops
    "no-loop-func": "warn",

    // disallow reassignments of native objects
    "no-native-reassign": "error",

    // disallow negation of the left operand of an in expression
    "no-negated-in-lhs": "error",

    // disallow use of new operator when not part of the assignment or comparison
    "no-new": "error",

    // disallow use of new operator for Function object
    "no-new-func": "error",

    // disallow use of the Object constructor
    "no-new-object": "error",

    // disallows creating new instances of String, Number, and Boolean
    "no-new-wrappers": "error",

    // disallow the use of object properties of the global object (Math and JSON) as functions
    "no-obj-calls": "error",

    // disallow use of octal literals
    "no-octal": "error",

    // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \050";
    "no-octal-escape": "error",

    // disallow declaring the same variable more then once
    "no-redeclare": "error",

    // disallow comparisons where both sides are exactly the same
    "no-self-compare": "error",

    // disallow declaration of variables already declared in the outer scope
    "no-shadow": "warn",

    // disallow sparse arrays
    "no-sparse-arrays": "error",

    // disallow use of undeclared variables unless mentioned in a /*global */ block
    "no-undef": "error",

    // disallow unreachable statements after a return, throw, continue, or break statement
    "no-unreachable": "warn",

    // disallow usage of expressions in statement position
    "no-unused-expressions": [
      "error",
      {
        allowShortCircuit: true,   // allow short-circuited expressions (e.g. foo && bar())
        allowTernary: true,        // allow ternary expressions (e.g. foo ? bar() : baz())
      },
    ],

    // disallow declaration of variables that are not used in the code
    "no-unused-vars": [
      "error",
      {
        vars: "all",                // check "all" variables (as opposed to just "local" variables)
        args: "after-used",         // check any arguments that come "after-used" arguments
      },
    ],

    // disallow comparisons with the value NaN
    "use-isnan": "error",

    // Ensure that the results of typeof are compared against a valid string
    "valid-typeof": "error",

    // require immediate function invocation to be wrapped in parentheses
    "wrap-iife": "error",

  }
};