feat(chore): use modern globalThis

globalThis is quite new feature, but all supported browsers except IE11 should support it - caniuse.com/?search=globalThis

I do not consider this a problem, as IE11 is kept supported when window is defined which normally is, only there is no longer a fallback when undefined/shadowed.

Author: mvorisek

src/definitions/behaviors/api.js

@@ -14,15 +14,14 @@
     function isWindow(obj) {
         return obj != null && obj === obj.window;
     }
+
     function isFunction(obj) {
         return typeof obj === 'function' && typeof obj.nodeType !== 'number';
     }
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.api = $.fn.api = function (parameters) {
         var

src/definitions/behaviors/form.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.form = function (parameters) {
         var

src/definitions/behaviors/state.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.state = function (parameters) {
         var

src/definitions/behaviors/visibility.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.visibility = function (parameters) {
         var

src/definitions/globals/site.js

@@ -9,10 +9,16 @@
  */
 
 (function ($, window, document, undefined) {
+    'use strict';
+
     function isFunction(obj) {
         return typeof obj === 'function' && typeof obj.nodeType !== 'number';
     }
 
+    window = (window !== undefined && window.Math == Math)
+        ? window
+        : globalThis;
+
     $.site = $.fn.site = function (parameters) {
         var
             time           = new Date().getTime(),

src/definitions/modules/accordion.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.accordion = function (parameters) {
         var

src/definitions/modules/calendar.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.calendar = function (parameters) {
         var

src/definitions/modules/checkbox.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.checkbox = function (parameters) {
         var

src/definitions/modules/dimmer.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.dimmer = function (parameters) {
         var

src/definitions/modules/dropdown.js

@@ -17,9 +17,7 @@
 
     window = (typeof window != 'undefined' && window.Math == Math)
         ? window
-        : (typeof self != 'undefined' && self.Math == Math)
-            ? self
-            : Function('return this')();
+        : globalThis;
 
     $.fn.dropdown = function (parameters) {
         var