.jshint explained example

{
    // Settings
    "passfail"      : false, // Stop on first error.
    "maxerr"        : 50,    // Maximum error before stopping.


    // Predefined globals whom JSHint will ignore.
    "browser"       : true,  // Standard browser globals e.g. `window`, `document`.
    "couch"         : false,
    "dojo"          : false,
    "jquery"        : true,
    "mootools"      : false,
    "node"          : false,
    "prototypejs"   : false,
    "rhino"         : false,
    "wsh"           : false,

    // Custom globals.
    "predef"        : [
        "define",
        "require"
    ],


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


    // EcmaScript 5.
    "es5"           : false, // Allow EcmaScript 5 syntax.
    "globalstrict"  : false, // Allow global "use strict" (also enables 'strict').
    "strict"        : false, // Require `use strict` pragma  in every file.


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


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