.jshintrc

{
  // Settings
  "esversion"     : 6,
  "passfail"      : false,  // Stop on first error.
  "maxerr"        : 100,    // Maximum errors before stopping.


  // Predefined globals whom JSHint will ignore.
  "browser"       : true,   // Standard browser globals e.g. `window`, `document`.

  "node"          : true,
  "rhino"         : false,
  "couch"         : false,
  "wsh"           : false,   // Windows Scripting Host.

  "jquery"        : false,
  "prototypejs"   : false,
  "mootools"      : false,
  "dojo"          : false,

  "predef"        : [  // Extra globals.
    "require",
    "define",
    "notify",
    "expect",
    "it",
    "afterEach",
    "describe",
    "jest"
  ],


  // Development.
  "debug"         : false,   // Allow debugger statements e.g. browser breakpoints.
  "devel"         : false,   // Allow development statements e.g. `console.log();`.


  // EcmaScript 5.
  "strict"        : true,   // Require `use strict` pragma in every file.
  "globalstrict"  : false,  // Allow global "use strict" (also enables 'strict').


  // The Good Parts.
  "asi"           : false,  // Tolerate Automatic Semicolon Insertion (no semicolons).
  "laxbreak"      : false,  // Tolerate unsafe line breaks e.g. `return [\n] x` without semicolons.
  "bitwise"       : true,   // Prohibit bitwise operators (&, |, ^, etc.).
  "boss"          : false,  // Tolerate assignments inside if, for & while. Usually conditions & loops are for comparison, not assignments.
  "curly"         : true,   // Require {} for every new block or scope.
  "eqeqeq"        : false,  // Require triple equals i.e. `===`.
  "eqnull"        : false,  // Tolerate use of `== null`.
  "evil"          : true,  // Tolerate use of `eval`.
  "expr"          : false,  // Tolerate `ExpressionStatement` as Programs.
  "forin"         : false,   // Tolerate `for in` loops without `hasOwnPrototype`.
  "immed"         : true,   // Require immediate invocations to be wrapped in parens e.g. `( function(){}() );`
  "latedef"       : false,  // Prohibit variable use before definition.
  "loopfunc"      : true,  // Allow functions to be defined within loops.
  "noarg"         : true,   // Prohibit use of `arguments.caller` and `arguments.callee`.
  "regexp"        : true,   // Prohibit `.` and `[^...]` in regular expressions.
  "regexdash"     : false,  // Tolerate unescaped last dash i.e. `[-...]`.
  "scripturl"     : true,   // Tolerate script-targeted URLs.
  "shadow"        : false,  // Allows re-define variables later in code e.g. `var x=1; x=2;`.
  "supernew"      : true,  // Tolerate `new function () { ... };` and `new Object;`.
  "undef"         : true,   // Require all non-global variables be declared before they are used.


  // Styling prefrences.
  "newcap"        : false,  // Require capitalization of all constructor functions e.g. `new F()`.
  "noempty"       : false,  // Prohibit use of empty blocks.
  "nonew"         : false,  // Prohibit use of constructors for side-effects.
  "nomen"         : false,  // Prohibit use of initial or trailing underbars in names.
  "onevar"        : false,  // Allow only one `var` statement per function.
  "plusplus"      : false,  // Prohibit use of `++` & `--`.
  "sub"           : true,   // Tolerate all forms of subscript notation besides dot notation e.g. `dict['key']` instead of `dict.key`.
  "trailing"      : false,  // Prohibit trailing whitespaces.
  "white"         : false   // Check against strict whitespace and indentation rules.
}