.jshintrc

{
    // ECMAScript 5.
    // "es5"           : true,   // Allow ECMAScript 5 syntax.
    // ** ES5 option is now set per default
    "strict"        : false,  // Require `use strict` pragma in every file.
    "globalstrict"  : false,  // Allow global "use strict" (also enables 'strict').

    // The Good Parts.
    // "asi"           : true,  // true: Tolerate Automatic Semicolon Insertion (no semicolons).
    // ** always semicolons
    "bitwise"       : true,   // true: Prohibit bitwise operators (&, |, ^, etc.).
    "boss"          : false,  // true: Tolerate assignments inside if, for & while. Usually conditions & loops are for comparison, not assignments.
    "curly"         : true,   // true: Require {} for every new block or scope.
    "eqeqeq"        : true,   // true: Require triple equals i.e. `===`.
    "eqnull"        : false,  // true: Tolerate use of `== null`.
    "evil"          : false,  // true: Tolerate use of `eval`.
    "expr"          : false,  // true: Tolerate `ExpressionStatement` as Programs.
    "forin"         : false,  // false: Tolerate `for in` loops without `hasOwnPrototype`.
    "latedef"       : true,   // true: Prohipit variable use before definition.
    "loopfunc"      : false,  // true: Allow functions to be defined within loops.
    "noarg"         : true,   // true: Prohibit use of `arguments.caller` and `arguments.callee`.
    "scripturl"     : true,   // true: Tolerate script-targeted URLs.
    "shadow"        : false,  // ** not sure what it does
    "supernew"      : false,  // true: Tolerate `new function () { ... };` and `new Object;`.
    "undef"         : true,   // true: Require all non-global variables be declared before they are used.

    // hbrls
    "freeze"        : true,     // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
    "funcscope"     : false,    // true: Tolerate defining variables inside control statements
    "nonbsp"        : true,     // true: Prohibit "non-breaking whitespace" characters.
    "nonew"         : false,    // true: Prohibit use of constructors for side-effects (without assignment)
    "notypeof"      : false,    // true: Tolerate invalid typeof operator values
    // "singleGroups"  : true,     // true: Warning: Unnecessary grouping operator. e.g. delete(obj.attr);
    // ** the .jsx uses `return (<div />)` a lot
    "unused"        : true,     // true: Require all defined variables be used
    "esnext"        : false,    // true: Allow ES.next (ES6) syntax (ex: `const`)
    "lastsemic"     : false,    // true: Tolerate omitting a semicolon for the last statement of a 1-line block
    "moz"           : false,    // true: Allow Mozilla specific syntax (extends and overrides esnext features)
    "noyield"       : false,    // true: Tolerate generator functions with no yield statement in them.
    "plusplus"      : true,     // true: Prohibit use of `++` & `--`
    "proto"         : false,    // true: Tolerate using the `__proto__` property
    "withstmt"      : false,

    "debug"         : false,    // true: Allow debugger statements e.g. browser breakpoints.
    "devel"         : true,     // true: Allow developments statements e.g. `console.log();`.
    "browser"       : true,     // Standard browser globals e.g. `window`, `document`.
    "browserify"    : true,     // Browserify
    "jasmine"       : true,     // Jasmine
    "mocha"         : true,     // Mocha

    "maxcomplexity" : false,    // {int} Max cyclomatic complexity per function
    "maxdepth"      : false,    // {int} Max depth of nested blocks (within functions)
    "maxparams"     : false,    // {int} Max number of formal params allowed per function
    "maxstatements" : false,    // {int} Max number statements per function

    "globals"       : {         // additional predefined global variables,
        "jest": false,
        "expect": true  // ** FIXME:
    }
}