JSHint configuration file

.jshintrc

{
  // --------------------------------------------------------------------
  // JSHint Configuration, Strict Edition
  // --------------------------------------------------------------------


  // == Enforcing Options ===============================================
  //
  // These options tell JSHint to be more strict towards your code. Use
  // them if you want to allow only a safe subset of JavaScript, very
  // useful when your codebase is shared with a big number of developers
  // with different skill levels.

  "bitwise"       : true,     // Prohibit bitwise operators (&, |, ^, etc.).
  "curly"         : true,     // Require {} for every new block or scope.
  "eqeqeq"        : true,     // Require triple equals i.e. `===`.
  "forin"         : false,     // Tolerate `for in` loops without `hasOwnPrototype`.
  "freeze"        : true,     // Prohibits overwriting prototypes of native objects such as Array, Date
  "immed"         : true,     // Require immediate invocations to be wrapped in parens e.g. `( function(){}() );`
  "latedef"       : true,     // Prohibit variable use before definition.
  "newcap"        : true,     // Require capitalization of all constructor functions e.g. `new F()`.
  "noarg"         : true,     // Prohibit use of `arguments.caller` and `arguments.callee`.
  "noempty"       : true,     // Prohibit use of empty blocks.
  "nonew"         : false,     // Prohibit use of constructors for side-effects.
  "plusplus"      : false,     // Prohibit use of `++` & `--`.
  "quotmark"      : true,     // Force consistency of quotemarks
  "undef"         : true,     // Require all non-global variables be declared before they are used.
  "strict"        : true,     // Require `use strict` pragma in every file.
  "trailing"      : true,     // Prohibit trailing whitespaces.
  "unused"        : true,     // Warn when you define and never use your variables


  // == Relaxing Options ================================================
  //
  // These options allow you to suppress certain types of warnings. Use
  // them only if you are absolutely positive that you know what you are
  // doing.

  "asi"           : false,    // Tolerate Automatic Semicolon Insertion (no semicolons).
  "boss"          : false,    // Tolerate assignments inside if, for & while. Usually conditions & loops are for comparison, not assignments.
  "debug"         : true,    // Allow debugger statements e.g. browser breakpoints.
  "eqnull"        : false,    // Tolerate use of `== null`.
  "esnext"        : true,    // Allow ES.next specific features such as `const` and `let`.
  "evil"          : false,    // Tolerate use of `eval`.
  "expr"          : false,    // Tolerate `ExpressionStatement` as Programs.
  "funcscope"     : true,    // Tolerate declarations of variables inside of control structures while accessing them later from the outside.
  "globalstrict"  : true,    // Allow global "use strict" (also enables 'strict').
  "iterator"      : false,    // Allow usage of __iterator__ property.
  "lastsemic"     : false,    // Tolerate missing semicolons when the it is omitted for the last statement in a one-line block.
  "laxbreak"      : false,    // Tolerate unsafe line breaks e.g. `return [\n] x` without semicolons.
  "laxcomma"      : false,    // Suppress warnings about comma-first coding style.
  "loopfunc"      : false,    // Allow functions to be defined within loops.
  "multistr"      : false,    // Tolerate multi-line strings.
  "proto"         : false,    // Tolerate __proto__ property. This property is deprecated.
  "scripturl"     : false,    // Tolerate script-targeted URLs.
  "smarttabs"     : false,    // Tolerate mixed tabs and spaces when the latter are used for alignment only.
  "shadow"        : false,    // Allows re-define variables later in code e.g. `var x=1; x=2;`.
  "sub"           : true,    // Tolerate all forms of subscript notation besides dot notation e.g. `dict['key']` instead of `dict.key`.
  "supernew"      : false,    // Tolerate `new function () { ... };` and `new Object;`.
  "validthis"     : true,    // Tolerate strict violations when the code is running in strict mode and you use this in a non-constructor function.

  // == Environments ====================================================
  //
  // These options pre-define global variables that are exposed by
  // popular JavaScript libraries and runtime environments—such as
  // browser or node.js.

  "browser"       : true,     // Standard browser globals e.g. `window`, `document`.
  "couch"         : false,    // Enable globals exposed by CouchDB.
  "devel"         : true,    // Allow development statements e.g. `console.log();`.
  "dojo"          : false,    // Enable globals exposed by Dojo Toolkit.
  "jquery"        : true,    // Enable globals exposed by jQuery JavaScript library.
  "mootools"      : false,    // Enable globals exposed by MooTools JavaScript framework.
  "node"          : true,    // Enable globals available when code is running inside of the NodeJS runtime environment.
  "nonstandard"   : false,    // Define non-standard but widely adopted globals such as escape and unescape.
  "phantom"       : true,     // Enable globbals exposed by PhantomJS
  "prototypejs"   : false,    // Enable globals exposed by Prototype JavaScript framework.
  "rhino"         : false,    // Enable globals available when your code is running inside of the Rhino runtime environment.
  "wsh"           : false,    // Enable globals available when your code is running as a script for the Windows Script Host.

  // == Undocumented Options ============================================
  //
  // While I've found these options in [example1][2] and [example2][3]
  // they are not described in the [JSHint Options documentation][4].
  //
  // [4]: http://www.jshint.com/options/

  "maxerr"        : 100,      // Maximum errors before stopping.
  "predef"        : [         // Extra globals.
    "require"
  ],
  "indent"        : 2         // Specify indentation spacing
}

New using jshint but i encouter a problem in PHPStorm and after read the official documetation i see this
"esnext: Warning This option has been deprecated and will be removed in the next major release of JSHint. Use esversion: 6 instead."
Thank you for the resource