diff --git a/bin/build.js b/bin/build.js
index 2a7a1e9..896cffb 100644
--- a/bin/build.js
+++ b/bin/build.js
@@ -11,14 +11,14 @@ pkg = require('../package.json'),
 J = require('../jsus.js').JSUS,
 version = pkg.version;
 
-
+// console.log(J);
 
 function buildIt(options) {
 
     var out = options.output || "jsus";
 
     if (path.extname(out) === '.js') {
-	out = path.basename(out, '.js');
+		out = path.basename(out, '.js');
     }
 
     console.log('Building JSUS v.' + version + ' with:');
@@ -42,8 +42,8 @@ function buildIt(options) {
     console.log('  - JSUS core');
 
     if (options.all) {
-	files = files.concat(J.obj2Array(jsus_libs));
-	console.log('  - JSUS lib: all available libs included');
+		files = files.concat(J.obj2Array(jsus_libs));
+		console.log('  - JSUS lib: all available libs included');
     }
     else {
 	var selected = options.lib;
diff --git a/build/jsus.js b/build/jsus.js
index 82ad1a9..023dd90 100644
--- a/build/jsus.js
+++ b/build/jsus.js
@@ -9,7 +9,9 @@
  * ---
  */
 (function(exports) {
-
+    
+    var files, inits;
+    
     var JSUS = exports.JSUS = {};
 
     // ## JSUS._classes
@@ -143,17 +145,36 @@
 
     // ## Node.JS includes
     if (JSUS.isNodeJS()) {
-        require('./lib/compatibility');
-        require('./lib/obj');
-        require('./lib/array');
-        require('./lib/time');
-        require('./lib/eval');
-        require('./lib/dom');
-        require('./lib/random');
-        require('./lib/parse');
-        require('./lib/queue');
-        require('./lib/fs');
+        inits = [];
+        files = [
+            'compatibility', 
+            'obj', 
+            'array',
+             'time',
+              'eval',
+               'dom', 
+            'random',
+             'parse',
+              'queue',
+               'fs'
+        ];
+        // files = [ 'array' ]
+
+        // Load all files.
+        files.forEach(function(file) {
+            const arr = require('./lib/' + file);
+            // destructuring does not work with Uglify JS [ FN, init ]
+            JSUS.extend(arr[0]);
+            inits.push(arr[1]);
+        });
+
+        // After all is loaded, JSUS is complete, initialize the libraries
+        // with cross-references (this approach avoids circular references).
+        inits.forEach(function(init) {
+            init(JSUS);
+        });
     }
+
     else {
         // Exports J in the browser.
         exports.J = exports.JSUS;
@@ -166,15 +187,17 @@
 
 /**
  * # ARRAY
- * Copyright(c) 2017 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Collection of static functions to manipulate arrays
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function ARRAY() {}
 
     /**
@@ -263,7 +286,7 @@
         if (end === Infinity) return false;
         // TODO: increment zero might be fine if start=end. Check.
         if (increment === 0) return false;
-        if (!JSUS.inArray(typeof increment, ['undefined', 'number'])) {
+        if (!ARRAY.inArray(typeof increment, ['undefined', 'number'])) {
             return false;
         }
         if (start === end) {
@@ -342,12 +365,12 @@
         func = arguments[1];
 
         if (!ARRAY.isArray(array)) {
-            JSUS.log('ARRAY.map: first parameter must be array. Found: ' +
+            console.log('ARRAY.map: first parameter must be array. Found: ' +
                      array);
             return;
         }
         if ('function' !== typeof func) {
-            JSUS.log('ARRAY.map: second parameter must be function. Found: ' +
+            console.log('ARRAY.map: second parameter must be function. Found: ' +
                      func);
             return;
         }
@@ -395,7 +418,7 @@
         if ('undefined' === typeof needle || !haystack) return false;
 
         if ('object' === typeof needle) {
-            func = JSUS.equals;
+            func = _J.equals;
         }
         else {
             func = function(a, b) {
@@ -430,7 +453,7 @@
     ARRAY.inArray = function(needle, haystack) {
         var func, i, len;
         if (!haystack) return false;
-        func = JSUS.equals;
+        func = _J.equals;
         len = haystack.length;
         for (i = 0; i < len; i++) {
             if (func.call(this, needle, haystack[i])) {
@@ -559,9 +582,9 @@
 
         for (i=0; i < N; i++) {
             do {
-                idx = JSUS.randomInt(start,limit);
+                idx = _J.randomInt(start,limit);
             }
-            while (JSUS.inArray(idx, extracted));
+            while (ARRAY.inArray(idx, extracted));
             extracted.push(idx);
 
             if (idx == 1) {
@@ -723,7 +746,7 @@
         if (!ARRAY.isArray(array)) array = [ array ];
         if (!times) return array.slice(0);
         if (times < 1) {
-            JSUS.log('times must be greater or equal 1', 'ERR');
+            console.log('times must be greater or equal 1', 'ERR');
             return;
         }
         i = 1;
@@ -770,7 +793,7 @@
         if (!times) return array.slice(0);
         if ('number' === typeof times) {
             if (times < 1) {
-                JSUS.log('times must be greater or equal 1', 'ERR');
+                console.log('times must be greater or equal 1', 'ERR');
                 return;
             }
             times = ARRAY.rep([times], array.length);
@@ -801,7 +824,7 @@
      */
     ARRAY.arrayIntersect = function(a1, a2) {
         return a1.filter( function(i) {
-            return JSUS.inArray(i, a2);
+            return ARRAY.inArray(i, a2);
         });
     };
 
@@ -819,7 +842,7 @@
      */
     ARRAY.arrayDiff = function(a1, a2) {
         return a1.filter( function(i) {
-            return !(JSUS.inArray(i, a2));
+            return !(ARRAY.inArray(i, a2));
         });
     };
 
@@ -921,23 +944,33 @@
         return t;
     };
 
-    JSUS.extend(ARRAY);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(ARRAY);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ ARRAY, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # COMPATIBILITY
  *
- * Copyright(c) 2015 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Tests browsers ECMAScript 5 compatibility
  *
  * For more information see http://kangax.github.com/es5-compat-table/
  */
-(function(JSUS) {
+(function() {
     "use strict";
 
+    var _J, init;
+
     function COMPATIBILITY() {}
 
     /**
@@ -985,23 +1018,32 @@
     };
 
 
-    JSUS.extend(COMPATIBILITY);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(COMPATIBILITY);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ COMPATIBILITY, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # DOM
- * Copyright(c) 2019 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Helper library to perform generic operation with DOM elements.
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
-
+    
+    var _J, init;
     var onFocusChange, changeTitle;
-
+        
     function DOM() {}
 
     // ## GET/ADD
@@ -1165,7 +1207,7 @@
     DOM.write = function(root, text) {
         var content;
         if ('undefined' === typeof text || text === null) text = "";
-        if (JSUS.isNode(text) || JSUS.isElement(text)) content = text;
+        if (DOM.isNode(text) || DOM.isElement(text)) content = text;
         else content = document.createTextNode(text);
         root.appendChild(content);
         return content;
@@ -1180,7 +1222,7 @@
      */
     DOM.write2 = function(root, text) {
         if ('undefined' === typeof text) text = "";
-        if (JSUS.isNode(text) || JSUS.isElement(text)) root.appendChild(text);
+        if (DOM.isNode(text) || DOM.isElement(text)) root.appendChild(text);
         else root.innerHTML += text;
     };
 
@@ -1289,7 +1331,7 @@
                     idx_finish = string.indexOf(key, idx_replace);
 
                     if (idx_finish === -1) {
-                        JSUS.log('Error. Could not find closing key: ' + key);
+                        console.log('Error. Could not find closing key: ' + key);
                         continue;
                     }
 
@@ -1307,20 +1349,20 @@
                     break;
 
                 default:
-                    JSUS.log('Identifier not in [!,@,%]: ' + key[0]);
+                    console.log('Identifier not in [!,@,%]: ' + key[0]);
 
                 }
             }
         }
 
         // No span to create, return what we have.
-        if (!JSUS.size(spans)) {
+        if (!_J.size(spans)) {
             return root.appendChild(document.createTextNode(string));
         }
 
         // Re-assamble the string.
 
-        idxs = JSUS.keys(spans).sort(function(a, b){ return a - b; });
+        idxs = _J.keys(spans).sort(function(a, b){ return a - b; });
         idx_finish = 0;
         for (i = 0; i < idxs.length; i++) {
 
@@ -1427,12 +1469,12 @@
     DOM.shuffleElements = function(parent, order, cb) {
         var i, len, numOrder, idOrder, children, child;
         var id;
-        if (!JSUS.isNode(parent)) {
+        if (!DOM.isNode(parent)) {
             throw new TypeError('DOM.shuffleElements: parent must be a node. ' +
                                'Found: ' + parent);
         }
         if (!parent.children || !parent.children.length) {
-            JSUS.log('DOM.shuffleElements: parent has no children.', 'ERR');
+            console.log('DOM.shuffleElements: parent has no children.', 'ERR');
             return false;
         }
         if (order) {
@@ -1440,7 +1482,7 @@
                 cb = order;
             }
             else {
-                if (!JSUS.isArray(order)) {
+                if (!_J.isArray(order)) {
                     throw new TypeError('DOM.shuffleElements: order must be ' +
                                         'array. Found: ' + order);
                 }
@@ -1472,7 +1514,7 @@
         len = children.length;
         idOrder = new Array(len);
         if (cb) numOrder = new Array(len);
-        if (!order) order = JSUS.sample(0, (len-1));
+        if (!order) order = _J.sample(0, (len-1));
         for (i = 0 ; i < len; i++) {
             id = children[order[i]].id;
             if ('string' !== typeof id || id === "") {
@@ -1582,7 +1624,7 @@
             throw new Error('DOM.addCSS: root is undefined, and could not ' +
                             'detect a valid root for css: ' + cssPath);
         }
-        attributes = JSUS.mixin({
+        attributes = _J.mixin({
             rel : 'stylesheet',
             type: 'text/css',
             href: cssPath
@@ -1615,7 +1657,7 @@
             throw new Error('DOM.addCSS: root is undefined, and could not ' +
                             'detect a valid root for css: ' + jsPath);
         }
-        attributes = JSUS.mixin({
+        attributes = _J.mixin({
             charset : 'utf-8',
             type: 'text/javascript',
             src: jsPath
@@ -1776,7 +1818,7 @@
                 }
             }
             else {
-                prefix = JSUS.randomString(8, 'a');
+                prefix = _J.randomString(8, 'a');
             }
             id = prefix + '_';
 
@@ -1790,7 +1832,7 @@
             found = true;
             counter = -1;
             while (found) {
-                id = prefix + '_' + JSUS.randomInt(1000);
+                id = prefix + '_' + _J.randomInt(1000);
                 found = scanDocuments(windows, id);
                 if (++counter > limit) {
                     throw new Error('DOM.generateUniqueId: could not ' +
@@ -2128,7 +2170,7 @@
             disable = 'undefined' === typeof disable ? true : disable;
             if (disable && !isDisabled) {
                 if (!history.pushState || !history.go) {
-                    JSUS.log('DOM.disableBackButton: method not ' +
+                    console.log('DOM.disableBackButton: method not ' +
                              'supported by browser.');
                     return null;
                 }
@@ -2242,7 +2284,7 @@
 
             // Option repeatFor.
             if ('undefined' !== typeof options.repeatFor) {
-                nRepeats = JSUS.isInt(options.repeatFor, 0);
+                nRepeats = _J.isInt(options.repeatFor, 0);
                 if (false === nRepeats) {
                     throw new TypeError(where + 'options.repeatFor must be ' +
                                         'a positive integer. Found: ' +
@@ -2252,7 +2294,7 @@
 
             // Option stopOnFocus.
             if (options.stopOnFocus) {
-                JSUS.onFocusIn(function() {
+                DOM.onFocusIn(function() {
                     clearBlinkInterval();
                     onFocusChange(null, null);
                 });
@@ -2275,8 +2317,8 @@
             // Option startOnBlur.
             if (options.startOnBlur) {
                 options.startOnBlur = null;
-                JSUS.onFocusOut(function() {
-                    JSUS.blinkTitle(titles, options);
+                DOM.onFocusOut(function() {
+                    DOM.blinkTitle(titles, options);
                 });
                 return null;
             }
@@ -2285,7 +2327,7 @@
             if ('string' === typeof titles) {
                 titles = [titles, '!!!'];
             }
-            else if (!JSUS.isArray(titles)) {
+            else if (!_J.isArray(titles)) {
                 throw new TypeError(where + 'titles must be string, ' +
                                     'array of strings or undefined. Found: ' +
                                     titles);
@@ -2451,7 +2493,7 @@
 
         if (!document) {
             return function() {
-                JSUS.log('onFocusChange: no document detected.');
+                console.log('onFocusChange: no document detected.');
                 return;
             };
         }
@@ -2531,9 +2573,16 @@
         }
     };
 
-    JSUS.extend(DOM);
-
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(DOM);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ DOM, init ];
+    }
+})();
 
 /**
  * # DOM
@@ -2564,7 +2613,7 @@
  * Only the methods which do not follow the above-mentioned syntax
  * will receive further explanation.
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
@@ -4105,21 +4154,30 @@
         }
     };
 
-    JSUS.extend(DOM);
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+    if ('undefined' !== typeof JSUS) {
+        JSUS.extend(DOM);
+    }
+    // Node.JS ESM or CJS
+    else {
+        module.exports = DOM;
+    }
+
+})();
 
 /**
  * # EVAL
- * Copyright(c) 2015 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Evaluation of strings as JavaScript commands
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function EVAL() {}
 
     /**
@@ -4161,13 +4219,22 @@
         return func.call(context, str);
     };
 
-    JSUS.extend(EVAL);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(EVAL);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ EVAL, init ];
+    }
+
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # FS
- * Copyright(c) 2018 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Collection of static functions related to file system operations.
@@ -4178,19 +4245,15 @@
  * @see https://github.com/jprichardson/node-fs-extra
  * @see https://github.com/substack/node-resolve
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
-    if (!JSUS.isNodeJS()){
-        JSUS.log('Cannot load JSUS.FS outside of Node.JS.');
-        return false;
-    }
-
-    var resolve = require('resolve'),
-        path = require('path'),
-        fs = require('fs');
+    const resolve = require('resolve');
+    const path = require('path');
+    const fs = require('fs');
 
+    var _J, init;
 
     function FS() {}
 
@@ -4300,7 +4363,7 @@
     FS.cleanDir = function(dir, ext, cb) {
         var filterFunc;
         if (!dir) {
-            JSUS.log('You must specify a directory to clean.');
+            console.log('You must specify a directory to clean.');
             return false;
         }
         if (ext) {
@@ -4319,11 +4382,11 @@
         fs.readdir(dir, function(err, files) {
             var asq, mycb;
             if (err) {
-                JSUS.log(err);
+                console.log(err);
                 return;
             }
             // Create async queue if a callback was specified.
-            if (cb) asq = JSUS.getQueue();
+            if (cb) asq = _J.getQueue();
             // Create a nested callback for the async queue, if necessary.
 
             files.filter(filterFunc).forEach(function(file) {
@@ -4331,7 +4394,7 @@
                     asq.add(file);
                     mycb = asq.getRemoveCb(file);
                 }
-                JSUS.deleteIfExists(dir + file, mycb);
+                FS.deleteIfExists(dir + file, mycb);
             });
 
             if (cb) {
@@ -4368,11 +4431,11 @@
     FS.copyFromDir = function(dirIn, dirOut, ext, cb) {
         var i, dir, dirs, stats;
         if (!dirIn) {
-            JSUS.log('You must specify a source directory.');
+            console.log('You must specify a source directory.');
             return false;
         }
         if (!dirOut) {
-            JSUS.log('You must specify a destination directory.');
+            console.log('You must specify a destination directory.');
             return false;
         }
 
@@ -4396,11 +4459,11 @@
         fs.readdir(dirIn, function(err, files) {
             var asq, i, mycb;
             if (err) {
-                JSUS.log(err);
+                console.log(err);
                 throw new Error();
             }
             // Create async queue if a callback was specified.
-            if (cb) asq = JSUS.getQueue();
+            if (cb) asq = _J.getQueue();
             for (i in files) {
                 if (ext && path.extname(files[i]) !== ext) {
                     continue;
@@ -4446,28 +4509,25 @@
         return fdr.pipe(fdw);
     };
 
-    JSUS.extend(FS);
+    init = function(J) { _J = J; };
+    module.exports = [ FS, init ];
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # OBJ
- * Copyright(c) 2019 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Collection of static functions to manipulate JavaScript objects
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
-    function OBJ() {}
-
-    var compatibility = null;
+    var _J, init, compatibility;
 
-    if ('undefined' !== typeof JSUS.compatibility) {
-        compatibility = JSUS.compatibility();
-    }
+    function OBJ() {}
 
     /**
      * ## OBJ.createObj
@@ -4920,7 +4980,7 @@
                 res.push(tmp);
             }
             // If array, expand it.
-            else if (JSUS.isArray(tmp) && tmp.length) {
+            else if (_J.isArray(tmp) && tmp.length) {
                 if (tmp.length < 4) {
                     res.push(tmp[0]);
                     if (tmp.length > 1) {
@@ -5087,12 +5147,12 @@
 
         if (obj && 'object' === typeof obj) {
             clone = Object.prototype.toString.call(obj) === '[object Array]' ?
-                [] : JSUS.createObj(obj.constructor.prototype);
+                [] : OBJ.createObj(obj.constructor.prototype);
 
             for (i in obj) {
                 if (obj.hasOwnProperty(i)) {
                     if (obj[i] && 'object' === typeof obj[i]) {
-                        clone[i] = JSUS.classClone(obj[i], depth - 1);
+                        clone[i] = OBJ.classClone(obj[i], depth - 1);
                     }
                     else {
                         clone[i] = obj[i];
@@ -5102,7 +5162,7 @@
             return clone;
         }
         else {
-            return JSUS.clone(obj);
+            return OBJ.clone(obj);
         }
     };
 
@@ -5415,7 +5475,7 @@
     OBJ.setNestedValue = function(str, value, obj) {
         var keys, k;
         if (!str) {
-            JSUS.log('Cannot set value of undefined property', 'ERR');
+            console.log('Cannot set value of undefined property', 'ERR');
             return false;
         }
         obj = ('object' === typeof obj) ? obj : {};
@@ -5579,18 +5639,18 @@
 
         makeClone = function(value, out, keys) {
             var i, len, tmp, copy;
-            copy = JSUS.clone(model);
+            copy = OBJ.clone(model);
 
             switch(keys.length) {
             case 0:
-                copy[_key] = JSUS.clone(value);
+                copy[_key] = OBJ.clone(value);
                 break;
             case 1:
-                copy[_key][keys[0]] = JSUS.clone(value);
+                copy[_key][keys[0]] = OBJ.clone(value);
                 break;
             case 2:
                 copy[_key][keys[0]] = {};
-                copy[_key][keys[0]][keys[1]] = JSUS.clone(value);
+                copy[_key][keys[0]][keys[1]] = OBJ.clone(value);
                 break;
             default:
                 i = -1, len = keys.length-1;
@@ -5599,7 +5659,7 @@
                     tmp[keys[i]] = {};
                     tmp = tmp[keys[i]];
                 }
-                tmp[keys[keys.length-1]] = JSUS.clone(value);
+                tmp[keys[keys.length-1]] = OBJ.clone(value);
             }
             out.push(copy);
             return;
@@ -5614,7 +5674,7 @@
             }
             else {
 
-                curPosAsKey = posAsKeys || !JSUS.isArray(value);
+                curPosAsKey = posAsKeys || !_J.isArray(value);
 
                 for (i in value) {
                     if (value.hasOwnProperty(i)) {
@@ -5649,7 +5709,7 @@
                 throw new TypeError('JSUS.split: l must a non-negative ' +
                                     'number or undefined. Found: ' + l);
             }
-            model = JSUS.clone(o);
+            model = OBJ.clone(o);
             if ('object' !== typeof o[key]) return [model];
             // Init.
             out = [];
@@ -5716,7 +5776,7 @@
     OBJ.uniqueKey = function(obj, prefixName, stop) {
         var name, duplicateCounter;
         if (!obj) {
-            JSUS.log('Cannot find unique name in undefined object', 'ERR');
+            console.log('Cannot find unique name in undefined object', 'ERR');
             return;
         }
         duplicateCounter = 1;
@@ -5925,21 +5985,34 @@
         return res;
     };
 
-    JSUS.extend(OBJ);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(OBJ);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { 
+            _J = J;
+            compatibility = _J.compatibility();
+        };
+        module.exports = [ OBJ, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # PARSE
- * Copyright(c) 2017 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Collection of static functions related to parsing strings
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function PARSE() {}
 
     /**
@@ -6045,7 +6118,7 @@
 
         pattern = '[';
 
-        JSUS.each(separators, function(s) {
+        separators.forEach(function(s) {
             if (s === ' ') s = '\\s';
 
             pattern += s;
@@ -6179,7 +6252,7 @@
                     return value;
                 }
                 else if (value.substring(0, len_func) === PARSE.marker_func) {
-                    return JSUS.eval(value.substring(len_prefix));
+                    return _J.eval(value.substring(len_prefix));
                 }
                 else if (value.substring(0, len_null) === PARSE.marker_null) {
                     return null;
@@ -6401,7 +6474,7 @@
         if ('undefined' === typeof available) {
             available = expr;
         }
-        else if (JSUS.isArray(available)) {
+        else if (_J.isArray(available)) {
             if (available.length === 0) return solution;
             begin = Math.min.apply(null, available);
             end = Math.max.apply(null, available);
@@ -6550,11 +6623,11 @@
             throw new Error('PARSE.range: invalid dot found: ' + expr);
         }
 
-        if (JSUS.isArray(available)) {
+        if (_J.isArray(available)) {
             i = -1, len = available.length;
             for ( ; ++i < len ; ) {
                 x = parseInt(available[i], 10);
-                if (JSUS.eval(expr.replace(/x/g, x))) {
+                if (_J.eval(expr.replace(/x/g, x))) {
                     solution.push(x);
                 }
             }
@@ -6562,7 +6635,7 @@
         else {
             while (!available.isFinished()) {
                 x = parseInt(available.next(), 10);
-                if (JSUS.eval(expr.replace(/x/g, x))) {
+                if (_J.eval(expr.replace(/x/g, x))) {
                     solution.push(x);
                 }
             }
@@ -6640,21 +6713,31 @@
         };
     }
 
-    JSUS.extend(PARSE);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(PARSE);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ PARSE, init ];    
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # QUEUE
- * Copyright(c) 2015 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Handles a simple queue of operations
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     var QUEUE = {};
 
     QUEUE.getQueue = function() {
@@ -6689,7 +6772,7 @@
      * @return {boolean} TRUE, if no operation is in progress
      */
     Queue.prototype.isReady = function() {
-        return JSUS.isEmpty(this.inProgress);
+        return _J.isEmpty(this.inProgress);
     };
 
     /**
@@ -6709,7 +6792,7 @@
             throw new TypeError('Queue.onReady: cb must be function. Found: ' +
                                cb);
         }
-        if (JSUS.isEmpty(this.inProgress)) cb();
+        if (_J.isEmpty(this.inProgress)) cb();
         else this.queue.push(cb);
     };
 
@@ -6726,7 +6809,7 @@
         if (key && 'string' !== typeof key) {
             throw new Error('Queue.add: key must be string.');
         }
-        key = JSUS.uniqueKey(this.inProgress, key);
+        key = _J.uniqueKey(this.inProgress, key);
         if ('string' !== typeof key) {
             throw new Error('Queue.add: an error occurred ' +
                             'generating unique key.');
@@ -6747,7 +6830,7 @@
             throw new Error('Queue.remove: key must be string.');
         }
         delete this.inProgress[key];
-        if (JSUS.isEmpty(this.inProgress)) {
+        if (_J.isEmpty(this.inProgress)) {
             this.executeAndClear();
         }
     };
@@ -6787,21 +6870,31 @@
         }
     };
 
-    JSUS.extend(QUEUE);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(QUEUE);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ QUEUE, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # RANDOM
- * Copyright(c) 2017 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Generates pseudo-random numbers
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function RANDOM() {}
 
     /**
@@ -6915,9 +7008,9 @@
      */
     RANDOM.sample = function(a, b) {
         var out;
-        out = JSUS.seq(a,b);
+        out = _J.seq(a,b);
         if (!out) return false;
-        return JSUS.shuffle(out);
+        return _J.shuffle(out);
     };
 
     /**
@@ -7212,7 +7305,7 @@
             if (nSpaces > -1) {
                 nSpaces = chars.charAt(nSpaces + 1);
                 // nSpaces is integer > 0 or 1.
-                nSpaces = JSUS.isInt(nSpaces, 0) || 1;
+                nSpaces = _J.isInt(nSpaces, 0) || 1;
                 if (nSpaces === 1) mask += ' ';
                 else if (nSpaces === 2) mask += '  ';
                 else if (nSpaces === 3) mask += '   ';
@@ -7250,22 +7343,32 @@
             RANDOM.randomString(RANDOM.randomInt(2,3));
     };
 
-    JSUS.extend(RANDOM);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(RANDOM);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ RANDOM, init ];    
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
 
 /**
  * # TIME
- * Copyright(c) 2021 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Collection of static functions related to the generation,
  * manipulation, and formatting of time strings in JavaScript
  */
-(function (JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function TIME() {}
 
     function pad(number) {
@@ -7388,6 +7491,14 @@
     TIME.now = 'function' === typeof Date.now ?
         Date.now : function() { return new Date().getTime(); }
 
-    JSUS.extend(TIME);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(TIME);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ TIME, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/build/jsus.min.js b/build/jsus.min.js
index 60151e8..b083021 100644
--- a/build/jsus.min.js
+++ b/build/jsus.min.js
@@ -8,4 +8,4 @@
  * See README.md for extra help.
  * ---
  */
-(function(e){var t=e.JSUS={};t._classes={},"undefined"==typeof console&&(console={}),"undefined"==typeof console.log&&(console.log=function(){}),t.log=function(e){console.log(e)},t.extend=function(e,n){var r,i;if("object"!=typeof e&&"function"!=typeof e)return n;"undefined"==typeof n&&(n=n||this,"function"==typeof e?(r=e.toString(),r=r.substr("function ".length),r=r.substr(0,r.indexOf("("))):r=e.constructor||e.__proto__.constructor,r&&(this._classes[r]=e));for(i in e)e.hasOwnProperty(i)&&(typeof n[i]!="object"?n[i]=e[i]:t.extend(e[i],n[i]));return e.prototype&&t.extend(e.prototype,n.prototype||n),n},t.require=function(e,n){var r;n="undefined"==typeof n?!0:n;if(n&&"undefined"==typeof t.clone)return t.log("JSUS.require: JSUS.clone not found, but clone requested. Cannot continue."),!1;if("undefined"==typeof e)r=t._classes;else{r=t._classes[e];if("undefined"==typeof r)return t.log("JSUS.require: could not find component "+e),!1}return n?t.clone(r):r},t.isNodeJS=function(){return"undefined"!=typeof module&&"undefined"!=typeof module.exports&&"function"==typeof require},t.isNodeJS()?(require("./lib/compatibility"),require("./lib/obj"),require("./lib/array"),require("./lib/time"),require("./lib/eval"),require("./lib/dom"),require("./lib/random"),require("./lib/parse"),require("./lib/queue"),require("./lib/fs")):e.J=e.JSUS})("undefined"!=typeof module&&"undefined"!=typeof module.exports?module.exports:window),function(e){"use strict";function t(){}Array.prototype.filter||(Array.prototype.filter=function(e){if(this===void 0||this===null)throw new TypeError;var t=new Object(this),n=t.length>>>0;if(typeof e!="function")throw new TypeError;var r=[],i=arguments[1];for(var s=0;s<n;s++)if(s in t){var o=t[s];e.call(i,o,s,t)&&r.push(o)}return r}),t.isArray=function(e){return"function"==typeof e?e:function(e){return e?Object.prototype.toString.call(e)==="[object Array]":!1}}(Array.isArray),t.seq=function(t,n,r,i){var s,o;if("number"!=typeof t)return!1;if(t===Infinity)return!1;if("number"!=typeof n)return!1;if(n===Infinity)return!1;if(r===0)return!1;if(!e.inArray(typeof r,["undefined","number"]))return!1;if(t===n)return i?[i(t)]:[t];r=r||1,i=i||function(e){return e},s=t,o=[];if(t<n)while(s<=n)o.push(i(s)),s+=r;else while(s>=n)o.push(i(s)),s-=r;return o},t.each=function(e,t,n){var r,i;if("object"!=typeof e)throw new TypeError("ARRAY.each: array must be object. Found: "+e);if("function"!=typeof t)throw new TypeError("ARRAY.each: cb must be function. Found: "+t);n=n||this,i=e.length;for(r=0;r<i;r++)t.call(n,e[r],r)},t.map=function(){var n,r,i,s,o,u,a;u=arguments[0],a=arguments[1];if(!t.isArray(u)){e.log("ARRAY.map: first parameter must be array. Found: "+u);return}if("function"!=typeof a){e.log("ARRAY.map: second parameter must be function. Found: "+a);return}r=arguments.length;if(r===3)i=[null,arguments[2]];else if(r===4)i=[null,arguments[2],arguments[3]];else{r-=1,i=new Array(r);for(n=1;n<r;n++)i[n]=arguments[n+1]}s=[],r=u.length;for(n=0;n<r;n++)i[0]=u[n],o=a.apply(this,i),"undefined"!=typeof o&&s.push(o);return s},t.removeElement=function(t,n){var r,i;if("undefined"==typeof t||!n)return!1;"object"==typeof t?r=e.equals:r=function(e,t){return e===t};for(i=0;i<n.length;i++)if(r(t,n[i]))return n.splice(i,1);return!1},t.inArray=function(t,n){var r,i,s;if(!n)return!1;r=e.equals,s=n.length;for(i=0;i<s;i++)if(r.call(this,t,n[i]))return!0;return!1},t.in_array=function(e,n){return console.log("***ARRAY.in_array is deprecated. Use ARRAY.inArray instead.***"),t.inArray(e,n)},t.getNGroups=function(e,n){return t.getGroupsSizeN(e,Math.floor(e.length/n))},t.getGroupsSizeN=function(e,t){var n=e.slice(0),r=n.length,i=n.length,s=[],o,u,a=[],f=0;for(o=0;o<i;o++)u=Math.floor(Math.random()*r),f>=t&&(s.push(a),f=0,a=[]),a.push(n[u]),n.splice(u,1),r=n.length,f++;return a.length>0&&s.push(a),s},t._latinSquare=function(t,n,r){r="undefined"==typeof r?!0:r;if(t===n&&!r)return!1;var i=[],s=[];for(var o=0;o<t;o++)i[o]=o;var u=null,a=0,f=t,l=[];r||(f=t-1);for(o=0;o<n;o++){do u=e.randomInt(a,f);while(e.inArray(u,l));l.push(u),u==1?(s[o]=i.slice(u),s[o].push(0)):s[o]=i.slice(u).concat(i.slice(0,u))}return s},t.latinSquare=function(e,n){return n||(n=e),!e||e<0||n<0?!1:(n>e&&(n=e),t._latinSquare(e,n,!0))},t.latinSquareNoSelf=function(e,n){return n||(n=e-1),!e||e<0||n<0?!1:(n>e&&(n=e-1),t._latinSquare(e,n,!1))},t.generateCombinations=function n(e,t){var r,i,s,o,u;s=[];for(r=0;r<e.length;r++)if(t===1)s.push([e[r]]);else{o=n(e.slice(r+1,e.length),t-1);for(i=0;i<o.length;i++)u=o[i],u.unshift(e[r]),s.push(u)}return s},t.matchN=function(e,n,r){var i,s,o,u,a,f;if(!e)return;if(!n)return e;i=[],a=e.length,f=[];for(s=0;s<a;s++)o=e.slice(0),o.splice(s,1),r&&(o=t.arrayDiff(o,f)),u=t.getNRandom(o,n),f=f.concat(u),u.splice(0,0,e[s]),i.push(u),u=[];return i},t.rep=function(n,r){var i,s;t.isArray(n)||(n=[n]);if(!r)return n.slice(0);if(r<1){e.log("times must be greater or equal 1","ERR");return}i=1,s=n.slice(0);for(;i<r;i++)s=s.concat(n);return s},t.stretch=function(n,r){var i,s,o,u;if(!n)return;if(!r)return n.slice(0);if("number"==typeof r){if(r<1){e.log("times must be greater or equal 1","ERR");return}r=t.rep([r],n.length)}i=[];for(s=0;s<n.length;s++){o=r[s%r.length];for(u=0;u<o;u++)i.push(n[s])}return i},t.arrayIntersect=function(t,n){return t.filter(function(t){return e.inArray(t,n)})},t.arrayDiff=function(t,n){return t.filter(function(t){return!e.inArray(t,n)})},t.shuffle=function(e){var t,n,r,i,s;if(!e)return;t=Array.prototype.slice.call(e),n=e.length-1;for(s=n;s>0;s--)r=Math.floor(Math.random()*(s+1)),i=t[r],t[r]=t[s],t[s]=i;return t},t.getNRandom=function(e,n){return t.shuffle(e).slice(0,n)},t.distinct=function(e){var n=[];return e?(t.each(e,function(e){t.inArray(e,n)||n.push(e)}),n):n},t.transpose=function(e){if(!e)return;var n,r,i,s,o=[];n=e.length||0,r=t.isArray(e[0])?e[0].length:0;if(n===0||r===0)return o;for(i=0;i<r;i++){o[i]=[];for(s=0;s<n;s++)o[i][s]=e[s][i]}return o},e.extend(t)}("undefined"!=typeof JSUS?JSUS:module.parent.exports.JSUS),function(JSUS){"use strict";function COMPATIBILITY(){}COMPATIBILITY.compatibility=function(){var support={};try{Object.defineProperty({},"a",{enumerable:!1,value:1}),support.defineProperty=!0}catch(e){support.defineProperty=!1}try{eval("({ get x(){ return 1 } }).x === 1"),support.setter=!0}catch(err){support.setter=!1}try{var value;eval("({ set x(v){ value = v; } }).x = 1"),support.getter=!0}catch(err){support.getter=!1}return support},JSUS.extend(COMPATIBILITY)}("undefined"!=typeof JSUS?JSUS:module.parent.exports.JSUS),function(e){"use strict";function r(){}var t,n;r.get=function(e,t){var n;return n=document.createElement(e),"string"==typeof t?n.id=t:t&&this.addAttributes(n,t),e==="iframe"&&n.id&&!n.name&&(n.name=n.id),n},r.add=r.append=function(e,t,n){var i;i=this.get(e,n);if(n&&n.insertBefore){if(n.insertAfter)throw new Error("DOM.add: options.insertBefore and options.insertBefore cannot be both set.");if(!t.parentNode)throw new Error("DOM.add: root.parentNode not found. Cannot insert before.");t.parentNode.insertBefore(i,t)}else if(n&&n.insertAfter){if(!t.parentNode)throw new Error("DOM.add: root.parentNode not found. Cannot insert after.");r.insertAfter(i,t)}else t.appendChild(i);return i},r.addAttributes=function(e,t){var n;if(!r.isElement(e))throw new TypeError("DOM.addAttributes: elem must be HTMLElement. Found: "+e);if("undefined"==typeof t)return e;if("object"!=typeof t)throw new TypeError("DOM.addAttributes: attributes must be object or undefined. Found: "+t);for(n in t)t.hasOwnProperty(n)&&(n==="id"||n==="innerHTML"?e[n]=t[n]:n==="class"||n==="className"?r.addClass(e,t[n]):n==="style"?r.style(e,t[n]):n!=="insertBefore"&&n!=="insertAfter"&&e.setAttribute(n,t[n]));return e},r.write=function(t,n){var r;if("undefined"==typeof n||n===null)n="";return e.isNode(n)||e.isElement(n)?r=n:r=document.createTextNode(n),t.appendChild(r),r},r.write2=function(t,n){"undefined"==typeof n&&(n=""),e.isNode(n)||e.isElement(n)?t.appendChild(n):t.innerHTML+=n},r.writeln=function(e,t,n){var i;return i=r.write(e,t),this.add(n||"br",e),i},r.writeln2=function(e,t,n){r.write2(e,t),this.add(n||"br",e)},r.sprintf=function(t,n,i){var s,o,u,a,f,l,c,h,p;i=i||document.createElement("span"),c={},n=n||{},n["%strong"]="",n["%em"]="";for(h in n)if(n.hasOwnProperty(h))switch(h.charAt(0)){case"%":u=t.indexOf(h);if(u===-1)continue;f=u+h.length,a=t.indexOf(h,f);if(a===-1){e.log("Error. Could not find closing key: "+h);continue}c[u]=h;break;case"@":t=t.replace(h,escape(n[h]));break;case"!":t=t.replace(h,n[h]);break;default:e.log("Identifier not in [!,@,%]: "+h[0])}if(!e.size(c))return i.appendChild(document.createTextNode(t));l=e.keys(c).sort(function(e,t){return e-t}),a=0;for(p=0;p<l.length;p++)h=c[l[p]],u=t.indexOf(h),a!==u-1&&i.appendChild(document.createTextNode(t.substring(a,u))),f=u+h.length,a=t.indexOf(h,f),h==="%strong"?o=document.createElement("strong"):h==="%em"?o=document.createElement("em"):o=r.get("span",n[h]),s=t.substring(f,a),o.appendChild(document.createTextNode(s)),i.appendChild(o),a+=h.length;return a!==t.length&&i.appendChild(document.createTextNode(t.substring(a))),i},r.isNode=function(e){return!e||"object"!=typeof e?!1:"object"==typeof Node?e instanceof Node:"number"==typeof e.nodeType&&"string"==typeof e.nodeName},r.isElement=function(e){return e&&"object"==typeof e&&e.nodeType===1&&"string"==typeof e.nodeName},r.shuffleElements=function(t,n,r){var i,s,o,u,a,f,l;if(!e.isNode(t))throw new TypeError("DOM.shuffleElements: parent must be a node. Found: "+t);if(!t.children||!t.children.length)return e.log("DOM.shuffleElements: parent has no children.","ERR"),!1;if(n)if("undefined"==typeof r&&"function"==typeof n)r=n;else{if(!e.isArray(n))throw new TypeError("DOM.shuffleElements: order must be array. Found: "+n);if(n.length!==t.children.length)throw new Error("DOM.shuffleElements: order length must match the number of children nodes.")}if(r&&"function"!=typeof r)throw new TypeError("DOM.shuffleElements: order must be array. Found: "+n);a=t.children;if("undefined"==typeof a){f=this.firstChild;while(f)f.nodeType==1&&a.push(f),f=f.nextSibling}s=a.length,u=new Array(s),r&&(o=new Array(s)),n||(n=e.sample(0,s-1));for(i=0;i<s;i++){l=a[n[i]].id;if("string"!=typeof l||l==="")throw new Error("DOM.shuffleElements: no id found on child n. "+n[i]);u[i]=l,r&&(o[i]=n[i])}for(i=0;i<s;i++)t.appendChild(a[u[i]]),r&&r(a[u[i]],i,o[i]);return u},r.populateSelect=function(e,t){var n,i;if(!r.isElement(e))throw new TypeError("DOM.populateSelect: select must be HTMLElement. Found: "+e);if(t){if("object"!=typeof t)throw new TypeError("DOM.populateSelect: options must be object or undefined. Found: "+t);for(n in t)t.hasOwnProperty(n)&&(i=document.createElement("option"),i.value=n,i.innerHTML=t[n],e.appendChild(i))}return e},r.removeChildrenFromNode=function(e){while(e.hasChildNodes())e.removeChild(e.firstChild)},r.insertAfter=function(e,t){return t.insertBefore(e,t.nextSibling)},r.addCSS=function(t,n,r){if("string"!=typeof t||t.trim()==="")throw new TypeError("DOM.addCSS: cssPath must be a non-empty string. Found: "+t);n=n||document.head||document.body||document;if(!n)throw new Error("DOM.addCSS: root is undefined, and could not detect a valid root for css: "+t);return r=e.mixin({rel:"stylesheet",type:"text/css",href:t},r),this.add("link",n,r)},r.addJS=function(t,n,r){if("string"!=typeof t||t.trim()==="")throw new TypeError("DOM.addCSS: jsPath must be a non-empty string. 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Found: "+i);i=r(i),h=i.match(/([-+]?\d+)/g);if(h===null)throw new Error("PARSE.range: no numbers in available: "+i);c=Math.min.apply(null,h),i=n.range(i,{begin:c,end:Math.max.apply(null,h),value:c,next:function(){return this.value++},isFinished:function(){return this.value>this.end}}),f=Math.min.apply(null,i),l=Math.max.apply(null,i)}t=t.replace(/end/g,parseInt(l,10)),t=t.replace(/begin/g,parseInt(f,10)),t=r(t),t=t.replace(/([-+]?\d+\.\d+)/g,function(e,t){return parseInt(t,10)}),p=/[^ \*\d<>=!\|&\.\[\],\(\)\-\+%]/g;if(t.match(p))throw new Error("PARSE.range: invalid characters found: "+t);t=t.replace(/([^& ]) *& *([^& ])/g,"$1&&$2"),t=t.replace(/([^| ]) *\| *([^| ])/g,"$1||$2"),t=t.replace(/([-+]?\d+)/g,"(x==$1)"),t=t.replace(/% *\(x==([-+]?\d+)\)/,"!(x%$1)"),t=t.replace(/!\(x%([-+]?\d+)\) *={1,} *\(x==([-+]?\d+)\)/g,"(x%$1==$2)"),t=t.replace(/([<>]=?) *\(x==([-+]?\d+)\)/g,"(x$1$2)"),t=t.replace(/\(x==([-+]?\d+)\)\.{2,}\(x==(\+?\d+)\)\.{2,}\(x==([-+]?\d+)\)/g,"(x>=$1&&x<=$3&&!((x- $1)%$2))"),t=t.replace(/\(x==([-+]?\d+)\)\.{2,}\(x==(-\d+)\)\.{2,}\(x==([-+]?\d+)\)/g,"(x<=$1&&x>=$3&&!((x- $1)%$2))"),t=t.replace(/\(x==([-+]?\d+)\)\.{2,}\(x==([-+]?\d+)\)/g,"(x>=$1&&x<=$2)"),t=t.replace(/([(\[]) *\(x==([-+]?\d+)\) *, *\(x==([-+]?\d+)\) *([\])])/g,function(e,t,n,r,i){return"(x>"+(t=="("?"":"=")+n+"&&x<"+(i==")"?"":"=")+r+")"}),t=t.replace("*",1),t=t.replace(/\s/g,""),t=t.replace(/\)[,] *(!*)\(/g,")||$1("),p=/[^ \d<>=!\|&,\(\)\-\+%x\.]/g,d=/[^ &!|\(] *\(/g,v=/\.[^\d]|[^\d]\./;if(t.match(p))throw new Error("PARSE.range: invalid characters found: "+t);if(t.match(d))throw new Error("PARSE.range: invalid character before opending bracket found: "+t);if(t.match(v))throw new Error("PARSE.range: invalid dot found: "+t);if(e.isArray(i)){s=-1,o=i.length;for(;++s<o;)u=parseInt(i[s],10),e.eval(t.replace(/x/g,u))&&a.push(u)}else while(!i.isFinished())u=parseInt(i.next(),10),e.eval(t.replace(/x/g,u))&&a.push(u);return a},"undefined"!=typeof Function.prototype.name?n.funcName=function(e){if("function"!=typeof e)throw new TypeError("PARSE.funcName: func must be function. Found: "+e);return e.name}:n.funcName=function(e){var t,n;if("function"!=typeof e)throw new TypeError("PARSE.funcName: func must be function. Found: "+e);return t=/function\s([^(]{1,})\(/,n=t.exec(e.toString()),n&&n.length>1?n[1].trim():""},"undefined"!=typeof JSUS?(e=JSUS,JSUS.extend(n)):(t=function(t){e=t},module.exports=[n,t])}(),function(){"use strict";function r(){this.queue=[],this.inProgress={}}var e,t,n={};n.getQueue=function(){return new r},r.prototype.isReady=function(){return e.isEmpty(this.inProgress)},r.prototype.onReady=function(t){if("function"!=typeof t)throw new TypeError("Queue.onReady: cb must be function. Found: "+t);e.isEmpty(this.inProgress)?t():this.queue.push(t)},r.prototype.add=function(t){if(t&&"string"!=typeof t)throw new Error("Queue.add: key must be string.");t=e.uniqueKey(this.inProgress,t);if("string"!=typeof t)throw new Error("Queue.add: an error occurred generating unique key.");return this.inProgress[t]=t,t},r.prototype.remove=function(t){if("string"!=typeof t)throw new Error("Queue.remove: key must be string.");delete this.inProgress[t],e.isEmpty(this.inProgress)&&this.executeAndClear()},r.prototype.getRemoveCb=function(e){var t;if("string"!=typeof e)throw new Error("Queue.getRemoveCb: key must be string.");return t=this,function(){t.remove(e)}},r.prototype.executeAndClear=function(){var e,t;e=-1,t=this.queue.length;for(;++e<t;)this.queue[e]()},"undefined"!=typeof JSUS?(e=JSUS,JSUS.extend(n)):(t=function(t){e=t},module.exports=[n,t])}(),function(){"use strict";function n(){}var e,t;n.random=function(e,t){var n;if("undefined"==typeof t){if("undefined"==typeof e)return Math.random();t=e,e=0}return e===t?e:(t<e&&(n=e,e=t,t=n),Math.random()*(t-e)+e)},n.randomInt=function(e,t){return e===t?e:Math.floor(n.random(e,t)+1)},n.randomDate=function(){function e(e){return e&&Object.prototype.toString.call(e)==="[object Date]"&&!isNaN(e)}return function(t,n){if("undefined"==typeof t)t=new Date("1900");else if(!e(t))throw new TypeError("randomDate: startDate must be a valid date. Found: "+t);if("undefined"==typeof n)n=new Date;else if(!e(n))throw new TypeError("randomDate: endDate must be a valid date or undefined. Found: "+n);return new Date(t.getTime()+Math.random()*(n.getTime()-t.getTime()))}}(),n.sample=function(t,n){var r;return r=e.seq(t,n),r?e.shuffle(r):!1},n.getNormalGenerator=function(){return function(){var e,t,n,r,i;return function s(o,u){var a,f,l,c,h,p;if("number"!=typeof o)throw new TypeError("nextNormal: mu must be number.");if("number"!=typeof u)throw new TypeError("nextNormal: sigma must be number.");if(o!==e||u!==t)i=!1,e=o,t=u;return i?(i=!1,u*n+o):(f=Math.random(),l=Math.random(),c=2*f-1,h=2*l-1,p=c*c+h*h,p>=1?s(o,u):(r=Math.sqrt(-2*Math.log(p)/p),a=c*r,n=h*r,i=!0,u*a+o))}}()},n.nextNormal=n.getNormalGenerator(),n.nextLogNormal=function(e,t){if("number"!=typeof e)throw new TypeError("nextLogNormal: mu must be number.");if("number"!=typeof t)throw new TypeError("nextLogNormal: sigma must be number.");return Math.exp(n.nextNormal(e,t))},n.nextExponential=function(e){if("number"!=typeof e)throw new TypeError("nextExponential: lambda must be number.");if(e<=0)throw new TypeError("nextExponential: lambda must be greater than 0.");return-Math.log(1-Math.random())/e},n.nextBinomial=function(e,t){var n,r;if("number"!=typeof e)throw new TypeError("nextBinomial: p must be number.");if("number"!=typeof t)throw new TypeError("nextBinomial: trials must be number.");if(e<0||e>1)throw new TypeError("nextBinomial: p must between 0 and 1.");if(t<1)throw new TypeError("nextBinomial: trials must be greater than 0.");n=0,r=0;while(n<t)Math.random()<e&&(r+=1),n++;return r},n.nextGamma=function(e,t){var n,r,i,s,o,u,a,f,l;if("number"!=typeof e)throw new TypeError("nextGamma: alpha must be number.");if("number"!=typeof t)throw new TypeError("nextGamma: k must be number.");if(e<1)throw new TypeError("nextGamma: alpha must be greater than 1.");if(t<1)throw new TypeError("nextGamma: k must be greater than 1.");s=Math.random(),o=Math.random(),u=Math.random(),n=Math.floor(t)+3,r=1/t,i=1/e,a=0;for(f=3;++f<n;)a+=Math.log(Math.random());return a*=-i,l=Math.log(u)*(Math.pow(s,r)/(Math.pow(s,r)+Math.pow(o,1/(1-t)))),l*=-i,a+l},n.randomString=function(t,n,r){var i,s,o,u;if("undefined"!=typeof t)if("number"!=typeof t||t<1)throw new Error("randomString: len must a number > 0 or undefined. Found: "+t);if("undefined"!=typeof n){if("string"!=typeof n||n.trim()==="")throw new Error("randomString: chars must a non-empty string or undefined. Found: "+n)}else if(r)throw new Error("randomString: useChars is TRUE, but chars is undefined.");t=t||6,n=n||"a",i="";if(!r){n.indexOf("a")>-1&&(i+="abcdefghijklmnopqrstuvwxyz"),n.indexOf("A")>-1&&(i+="ABCDEFGHIJKLMNOPQRSTUVWXYZ"),n.indexOf("1")>-1&&(i+="0123456789"),n.indexOf("!")>-1&&(i+="!~`@#$%^&*()_+-={}[]:\";'<>?,./|\\"),u=n.indexOf("_");if(u>-1){u=n.charAt(u+1),u=e.isInt(u,0)||1;if(u===1)i+=" ";else if(u===2)i+="  ";else if(u===3)i+="   ";else{o=-1;for(;++o<u;)i+=" "}}}else i=n;o=-1,s="";for(;++o<t;)s+=i[Math.floor(Math.random()*i.length)];return s},n.randomEmail=function(){return n.randomString(n.randomInt(5,15),"!Aa0")+"@"+n.randomString(n.randomInt(3,10))+"."+n.randomString(n.randomInt(2,3))},"undefined"!=typeof JSUS?(e=JSUS,JSUS.extend(n)):(t=function(t){e=t},module.exports=[n,t])}(),function(){"use strict";function n(){}function r(e){return e<10?"0"+e:e}function i(e){var t,n;return t=new Date,n=r(t.getHours())+":"+r(t.getMinutes())+":"+r(t.getSeconds()),e&&(n+=":"+r(t.getMilliseconds())),n}var e,t;Date.prototype.toISOString||(Date.prototype.toISOString=function(){var e=(this.getUTCMilliseconds()/1e3).toFixed(3);return this.getUTCFullYear()+"-"+r(this.getUTCMonth()+1)+"-"+r(this.getUTCDate())+"T"+r(this.getUTCHours())+":"+r(this.getUTCMinutes())+":"+r(this.getUTCSeconds())+"."+e.slice(2,5)+"Z"}),n.getDate=n.getFullDate=function(){return(new Date).toISOString()},n.getTime=function(){return i()},n.getTimeM=function(){return i(!0)},n.parseMilliseconds=function(e){var t,n,r,i,s,o;if("number"!=typeof e)throw new TypeError("TIME.parseMilliseconds: ms must be number.");return t=[],n=e/1e3,t[4]=n,r=n%60,t[3]=Math.floor(r),n/=60,i=n%60,t[2]=Math.floor(i),n/=60,s=n%24,t[1]=Math.floor(s),n/=24,o=n,t[1]=Math.floor(o),t},n.now="function"==typeof Date.now?Date.now:function(){return(new Date).getTime()},"undefined"!=typeof JSUS?(e=JSUS,JSUS.extend(n)):(t=function(t){e=t},module.exports=[n,t])}()
\ No newline at end of file
diff --git a/jsus.js b/jsus.js
index e18be01..56ac857 100644
--- a/jsus.js
+++ b/jsus.js
@@ -9,7 +9,9 @@
  * ---
  */
 (function(exports) {
-
+    
+    var files, inits;
+    
     var JSUS = exports.JSUS = {};
 
     // ## JSUS._classes
@@ -143,17 +145,36 @@
 
     // ## Node.JS includes
     if (JSUS.isNodeJS()) {
-        require('./lib/compatibility');
-        require('./lib/obj');
-        require('./lib/array');
-        require('./lib/time');
-        require('./lib/eval');
-        require('./lib/dom');
-        require('./lib/random');
-        require('./lib/parse');
-        require('./lib/queue');
-        require('./lib/fs');
+        inits = [];
+        files = [
+            'compatibility', 
+            'obj', 
+            'array',
+             'time',
+              'eval',
+               'dom', 
+            'random',
+             'parse',
+              'queue',
+               'fs'
+        ];
+        // files = [ 'array' ]
+
+        // Load all files.
+        files.forEach(function(file) {
+            const arr = require('./lib/' + file);
+            // destructuring does not work with Uglify JS [ FN, init ]
+            JSUS.extend(arr[0]);
+            inits.push(arr[1]);
+        });
+
+        // After all is loaded, JSUS is complete, initialize the libraries
+        // with cross-references (this approach avoids circular references).
+        inits.forEach(function(init) {
+            init(JSUS);
+        });
     }
+
     else {
         // Exports J in the browser.
         exports.J = exports.JSUS;
diff --git a/lib/array.js b/lib/array.js
index 7096af4..1fc8f52 100644
--- a/lib/array.js
+++ b/lib/array.js
@@ -1,14 +1,16 @@
 /**
  * # ARRAY
- * Copyright(c) 2017 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Collection of static functions to manipulate arrays
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function ARRAY() {}
 
     /**
@@ -97,7 +99,7 @@
         if (end === Infinity) return false;
         // TODO: increment zero might be fine if start=end. Check.
         if (increment === 0) return false;
-        if (!JSUS.inArray(typeof increment, ['undefined', 'number'])) {
+        if (!ARRAY.inArray(typeof increment, ['undefined', 'number'])) {
             return false;
         }
         if (start === end) {
@@ -176,12 +178,12 @@
         func = arguments[1];
 
         if (!ARRAY.isArray(array)) {
-            JSUS.log('ARRAY.map: first parameter must be array. Found: ' +
+            console.log('ARRAY.map: first parameter must be array. Found: ' +
                      array);
             return;
         }
         if ('function' !== typeof func) {
-            JSUS.log('ARRAY.map: second parameter must be function. Found: ' +
+            console.log('ARRAY.map: second parameter must be function. Found: ' +
                      func);
             return;
         }
@@ -229,7 +231,7 @@
         if ('undefined' === typeof needle || !haystack) return false;
 
         if ('object' === typeof needle) {
-            func = JSUS.equals;
+            func = _J.equals;
         }
         else {
             func = function(a, b) {
@@ -264,7 +266,7 @@
     ARRAY.inArray = function(needle, haystack) {
         var func, i, len;
         if (!haystack) return false;
-        func = JSUS.equals;
+        func = _J.equals;
         len = haystack.length;
         for (i = 0; i < len; i++) {
             if (func.call(this, needle, haystack[i])) {
@@ -393,9 +395,9 @@
 
         for (i=0; i < N; i++) {
             do {
-                idx = JSUS.randomInt(start,limit);
+                idx = _J.randomInt(start,limit);
             }
-            while (JSUS.inArray(idx, extracted));
+            while (ARRAY.inArray(idx, extracted));
             extracted.push(idx);
 
             if (idx == 1) {
@@ -557,7 +559,7 @@
         if (!ARRAY.isArray(array)) array = [ array ];
         if (!times) return array.slice(0);
         if (times < 1) {
-            JSUS.log('times must be greater or equal 1', 'ERR');
+            console.log('times must be greater or equal 1', 'ERR');
             return;
         }
         i = 1;
@@ -604,7 +606,7 @@
         if (!times) return array.slice(0);
         if ('number' === typeof times) {
             if (times < 1) {
-                JSUS.log('times must be greater or equal 1', 'ERR');
+                console.log('times must be greater or equal 1', 'ERR');
                 return;
             }
             times = ARRAY.rep([times], array.length);
@@ -635,7 +637,7 @@
      */
     ARRAY.arrayIntersect = function(a1, a2) {
         return a1.filter( function(i) {
-            return JSUS.inArray(i, a2);
+            return ARRAY.inArray(i, a2);
         });
     };
 
@@ -653,7 +655,7 @@
      */
     ARRAY.arrayDiff = function(a1, a2) {
         return a1.filter( function(i) {
-            return !(JSUS.inArray(i, a2));
+            return !(ARRAY.inArray(i, a2));
         });
     };
 
@@ -755,6 +757,14 @@
         return t;
     };
 
-    JSUS.extend(ARRAY);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(ARRAY);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ ARRAY, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/lib/compatibility.js b/lib/compatibility.js
index 20b6c49..851d8d6 100644
--- a/lib/compatibility.js
+++ b/lib/compatibility.js
@@ -1,16 +1,18 @@
 /**
  * # COMPATIBILITY
  *
- * Copyright(c) 2015 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Tests browsers ECMAScript 5 compatibility
  *
  * For more information see http://kangax.github.com/es5-compat-table/
  */
-(function(JSUS) {
+(function() {
     "use strict";
 
+    var _J, init;
+
     function COMPATIBILITY() {}
 
     /**
@@ -58,6 +60,14 @@
     };
 
 
-    JSUS.extend(COMPATIBILITY);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(COMPATIBILITY);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ COMPATIBILITY, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/lib/dom.js b/lib/dom.js
index f7ac3a1..319f769 100644
--- a/lib/dom.js
+++ b/lib/dom.js
@@ -1,16 +1,17 @@
 /**
  * # DOM
- * Copyright(c) 2019 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Helper library to perform generic operation with DOM elements.
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
-
+    
+    var _J, init;
     var onFocusChange, changeTitle;
-
+        
     function DOM() {}
 
     // ## GET/ADD
@@ -174,7 +175,7 @@
     DOM.write = function(root, text) {
         var content;
         if ('undefined' === typeof text || text === null) text = "";
-        if (JSUS.isNode(text) || JSUS.isElement(text)) content = text;
+        if (DOM.isNode(text) || DOM.isElement(text)) content = text;
         else content = document.createTextNode(text);
         root.appendChild(content);
         return content;
@@ -189,7 +190,7 @@
      */
     DOM.write2 = function(root, text) {
         if ('undefined' === typeof text) text = "";
-        if (JSUS.isNode(text) || JSUS.isElement(text)) root.appendChild(text);
+        if (DOM.isNode(text) || DOM.isElement(text)) root.appendChild(text);
         else root.innerHTML += text;
     };
 
@@ -298,7 +299,7 @@
                     idx_finish = string.indexOf(key, idx_replace);
 
                     if (idx_finish === -1) {
-                        JSUS.log('Error. Could not find closing key: ' + key);
+                        console.log('Error. Could not find closing key: ' + key);
                         continue;
                     }
 
@@ -316,20 +317,20 @@
                     break;
 
                 default:
-                    JSUS.log('Identifier not in [!,@,%]: ' + key[0]);
+                    console.log('Identifier not in [!,@,%]: ' + key[0]);
 
                 }
             }
         }
 
         // No span to create, return what we have.
-        if (!JSUS.size(spans)) {
+        if (!_J.size(spans)) {
             return root.appendChild(document.createTextNode(string));
         }
 
         // Re-assamble the string.
 
-        idxs = JSUS.keys(spans).sort(function(a, b){ return a - b; });
+        idxs = _J.keys(spans).sort(function(a, b){ return a - b; });
         idx_finish = 0;
         for (i = 0; i < idxs.length; i++) {
 
@@ -436,12 +437,12 @@
     DOM.shuffleElements = function(parent, order, cb) {
         var i, len, numOrder, idOrder, children, child;
         var id;
-        if (!JSUS.isNode(parent)) {
+        if (!DOM.isNode(parent)) {
             throw new TypeError('DOM.shuffleElements: parent must be a node. ' +
                                'Found: ' + parent);
         }
         if (!parent.children || !parent.children.length) {
-            JSUS.log('DOM.shuffleElements: parent has no children.', 'ERR');
+            console.log('DOM.shuffleElements: parent has no children.', 'ERR');
             return false;
         }
         if (order) {
@@ -449,7 +450,7 @@
                 cb = order;
             }
             else {
-                if (!JSUS.isArray(order)) {
+                if (!_J.isArray(order)) {
                     throw new TypeError('DOM.shuffleElements: order must be ' +
                                         'array. Found: ' + order);
                 }
@@ -481,7 +482,7 @@
         len = children.length;
         idOrder = new Array(len);
         if (cb) numOrder = new Array(len);
-        if (!order) order = JSUS.sample(0, (len-1));
+        if (!order) order = _J.sample(0, (len-1));
         for (i = 0 ; i < len; i++) {
             id = children[order[i]].id;
             if ('string' !== typeof id || id === "") {
@@ -591,7 +592,7 @@
             throw new Error('DOM.addCSS: root is undefined, and could not ' +
                             'detect a valid root for css: ' + cssPath);
         }
-        attributes = JSUS.mixin({
+        attributes = _J.mixin({
             rel : 'stylesheet',
             type: 'text/css',
             href: cssPath
@@ -624,7 +625,7 @@
             throw new Error('DOM.addCSS: root is undefined, and could not ' +
                             'detect a valid root for css: ' + jsPath);
         }
-        attributes = JSUS.mixin({
+        attributes = _J.mixin({
             charset : 'utf-8',
             type: 'text/javascript',
             src: jsPath
@@ -785,7 +786,7 @@
                 }
             }
             else {
-                prefix = JSUS.randomString(8, 'a');
+                prefix = _J.randomString(8, 'a');
             }
             id = prefix + '_';
 
@@ -799,7 +800,7 @@
             found = true;
             counter = -1;
             while (found) {
-                id = prefix + '_' + JSUS.randomInt(1000);
+                id = prefix + '_' + _J.randomInt(1000);
                 found = scanDocuments(windows, id);
                 if (++counter > limit) {
                     throw new Error('DOM.generateUniqueId: could not ' +
@@ -1137,7 +1138,7 @@
             disable = 'undefined' === typeof disable ? true : disable;
             if (disable && !isDisabled) {
                 if (!history.pushState || !history.go) {
-                    JSUS.log('DOM.disableBackButton: method not ' +
+                    console.log('DOM.disableBackButton: method not ' +
                              'supported by browser.');
                     return null;
                 }
@@ -1251,7 +1252,7 @@
 
             // Option repeatFor.
             if ('undefined' !== typeof options.repeatFor) {
-                nRepeats = JSUS.isInt(options.repeatFor, 0);
+                nRepeats = _J.isInt(options.repeatFor, 0);
                 if (false === nRepeats) {
                     throw new TypeError(where + 'options.repeatFor must be ' +
                                         'a positive integer. Found: ' +
@@ -1261,7 +1262,7 @@
 
             // Option stopOnFocus.
             if (options.stopOnFocus) {
-                JSUS.onFocusIn(function() {
+                DOM.onFocusIn(function() {
                     clearBlinkInterval();
                     onFocusChange(null, null);
                 });
@@ -1284,8 +1285,8 @@
             // Option startOnBlur.
             if (options.startOnBlur) {
                 options.startOnBlur = null;
-                JSUS.onFocusOut(function() {
-                    JSUS.blinkTitle(titles, options);
+                DOM.onFocusOut(function() {
+                    DOM.blinkTitle(titles, options);
                 });
                 return null;
             }
@@ -1294,7 +1295,7 @@
             if ('string' === typeof titles) {
                 titles = [titles, '!!!'];
             }
-            else if (!JSUS.isArray(titles)) {
+            else if (!_J.isArray(titles)) {
                 throw new TypeError(where + 'titles must be string, ' +
                                     'array of strings or undefined. Found: ' +
                                     titles);
@@ -1460,7 +1461,7 @@
 
         if (!document) {
             return function() {
-                JSUS.log('onFocusChange: no document detected.');
+                console.log('onFocusChange: no document detected.');
                 return;
             };
         }
@@ -1540,6 +1541,13 @@
         }
     };
 
-    JSUS.extend(DOM);
-
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(DOM);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ DOM, init ];
+    }
+})();
diff --git a/lib/dom_legacy.js b/lib/dom_legacy.js
index f0631af..76f9a39 100644
--- a/lib/dom_legacy.js
+++ b/lib/dom_legacy.js
@@ -27,7 +27,7 @@
  * Only the methods which do not follow the above-mentioned syntax
  * will receive further explanation.
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
@@ -1568,6 +1568,13 @@
         }
     };
 
-    JSUS.extend(DOM);
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+    if ('undefined' !== typeof JSUS) {
+        JSUS.extend(DOM);
+    }
+    // Node.JS ESM or CJS
+    else {
+        module.exports = DOM;
+    }
+
+})();
diff --git a/lib/eval.js b/lib/eval.js
index e35499d..c0123df 100644
--- a/lib/eval.js
+++ b/lib/eval.js
@@ -1,14 +1,16 @@
 /**
  * # EVAL
- * Copyright(c) 2015 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Evaluation of strings as JavaScript commands
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function EVAL() {}
 
     /**
@@ -50,6 +52,15 @@
         return func.call(context, str);
     };
 
-    JSUS.extend(EVAL);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(EVAL);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ EVAL, init ];
+    }
+
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/lib/fs.js b/lib/fs.js
index 1883596..decb17f 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -1,6 +1,6 @@
 /**
  * # FS
- * Copyright(c) 2018 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Collection of static functions related to file system operations.
@@ -11,19 +11,15 @@
  * @see https://github.com/jprichardson/node-fs-extra
  * @see https://github.com/substack/node-resolve
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
-    if (!JSUS.isNodeJS()){
-        JSUS.log('Cannot load JSUS.FS outside of Node.JS.');
-        return false;
-    }
-
-    var resolve = require('resolve'),
-        path = require('path'),
-        fs = require('fs');
+    const resolve = require('resolve');
+    const path = require('path');
+    const fs = require('fs');
 
+    var _J, init;
 
     function FS() {}
 
@@ -133,7 +129,7 @@
     FS.cleanDir = function(dir, ext, cb) {
         var filterFunc;
         if (!dir) {
-            JSUS.log('You must specify a directory to clean.');
+            console.log('You must specify a directory to clean.');
             return false;
         }
         if (ext) {
@@ -152,11 +148,11 @@
         fs.readdir(dir, function(err, files) {
             var asq, mycb;
             if (err) {
-                JSUS.log(err);
+                console.log(err);
                 return;
             }
             // Create async queue if a callback was specified.
-            if (cb) asq = JSUS.getQueue();
+            if (cb) asq = _J.getQueue();
             // Create a nested callback for the async queue, if necessary.
 
             files.filter(filterFunc).forEach(function(file) {
@@ -164,7 +160,7 @@
                     asq.add(file);
                     mycb = asq.getRemoveCb(file);
                 }
-                JSUS.deleteIfExists(dir + file, mycb);
+                FS.deleteIfExists(dir + file, mycb);
             });
 
             if (cb) {
@@ -201,11 +197,11 @@
     FS.copyFromDir = function(dirIn, dirOut, ext, cb) {
         var i, dir, dirs, stats;
         if (!dirIn) {
-            JSUS.log('You must specify a source directory.');
+            console.log('You must specify a source directory.');
             return false;
         }
         if (!dirOut) {
-            JSUS.log('You must specify a destination directory.');
+            console.log('You must specify a destination directory.');
             return false;
         }
 
@@ -229,11 +225,11 @@
         fs.readdir(dirIn, function(err, files) {
             var asq, i, mycb;
             if (err) {
-                JSUS.log(err);
+                console.log(err);
                 throw new Error();
             }
             // Create async queue if a callback was specified.
-            if (cb) asq = JSUS.getQueue();
+            if (cb) asq = _J.getQueue();
             for (i in files) {
                 if (ext && path.extname(files[i]) !== ext) {
                     continue;
@@ -279,6 +275,7 @@
         return fdr.pipe(fdw);
     };
 
-    JSUS.extend(FS);
+    init = function(J) { _J = J; };
+    module.exports = [ FS, init ];
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/lib/obj.js b/lib/obj.js
index c2e474b..352f1f8 100644
--- a/lib/obj.js
+++ b/lib/obj.js
@@ -1,21 +1,17 @@
 /**
  * # OBJ
- * Copyright(c) 2019 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Collection of static functions to manipulate JavaScript objects
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
-    function OBJ() {}
-
-    var compatibility = null;
+    var _J, init, compatibility;
 
-    if ('undefined' !== typeof JSUS.compatibility) {
-        compatibility = JSUS.compatibility();
-    }
+    function OBJ() {}
 
     /**
      * ## OBJ.createObj
@@ -468,7 +464,7 @@
                 res.push(tmp);
             }
             // If array, expand it.
-            else if (JSUS.isArray(tmp) && tmp.length) {
+            else if (_J.isArray(tmp) && tmp.length) {
                 if (tmp.length < 4) {
                     res.push(tmp[0]);
                     if (tmp.length > 1) {
@@ -635,12 +631,12 @@
 
         if (obj && 'object' === typeof obj) {
             clone = Object.prototype.toString.call(obj) === '[object Array]' ?
-                [] : JSUS.createObj(obj.constructor.prototype);
+                [] : OBJ.createObj(obj.constructor.prototype);
 
             for (i in obj) {
                 if (obj.hasOwnProperty(i)) {
                     if (obj[i] && 'object' === typeof obj[i]) {
-                        clone[i] = JSUS.classClone(obj[i], depth - 1);
+                        clone[i] = OBJ.classClone(obj[i], depth - 1);
                     }
                     else {
                         clone[i] = obj[i];
@@ -650,7 +646,7 @@
             return clone;
         }
         else {
-            return JSUS.clone(obj);
+            return OBJ.clone(obj);
         }
     };
 
@@ -963,7 +959,7 @@
     OBJ.setNestedValue = function(str, value, obj) {
         var keys, k;
         if (!str) {
-            JSUS.log('Cannot set value of undefined property', 'ERR');
+            console.log('Cannot set value of undefined property', 'ERR');
             return false;
         }
         obj = ('object' === typeof obj) ? obj : {};
@@ -1127,18 +1123,18 @@
 
         makeClone = function(value, out, keys) {
             var i, len, tmp, copy;
-            copy = JSUS.clone(model);
+            copy = OBJ.clone(model);
 
             switch(keys.length) {
             case 0:
-                copy[_key] = JSUS.clone(value);
+                copy[_key] = OBJ.clone(value);
                 break;
             case 1:
-                copy[_key][keys[0]] = JSUS.clone(value);
+                copy[_key][keys[0]] = OBJ.clone(value);
                 break;
             case 2:
                 copy[_key][keys[0]] = {};
-                copy[_key][keys[0]][keys[1]] = JSUS.clone(value);
+                copy[_key][keys[0]][keys[1]] = OBJ.clone(value);
                 break;
             default:
                 i = -1, len = keys.length-1;
@@ -1147,7 +1143,7 @@
                     tmp[keys[i]] = {};
                     tmp = tmp[keys[i]];
                 }
-                tmp[keys[keys.length-1]] = JSUS.clone(value);
+                tmp[keys[keys.length-1]] = OBJ.clone(value);
             }
             out.push(copy);
             return;
@@ -1162,7 +1158,7 @@
             }
             else {
 
-                curPosAsKey = posAsKeys || !JSUS.isArray(value);
+                curPosAsKey = posAsKeys || !_J.isArray(value);
 
                 for (i in value) {
                     if (value.hasOwnProperty(i)) {
@@ -1197,7 +1193,7 @@
                 throw new TypeError('JSUS.split: l must a non-negative ' +
                                     'number or undefined. Found: ' + l);
             }
-            model = JSUS.clone(o);
+            model = OBJ.clone(o);
             if ('object' !== typeof o[key]) return [model];
             // Init.
             out = [];
@@ -1264,7 +1260,7 @@
     OBJ.uniqueKey = function(obj, prefixName, stop) {
         var name, duplicateCounter;
         if (!obj) {
-            JSUS.log('Cannot find unique name in undefined object', 'ERR');
+            console.log('Cannot find unique name in undefined object', 'ERR');
             return;
         }
         duplicateCounter = 1;
@@ -1473,6 +1469,17 @@
         return res;
     };
 
-    JSUS.extend(OBJ);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(OBJ);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { 
+            _J = J;
+            compatibility = _J.compatibility();
+        };
+        module.exports = [ OBJ, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/lib/parse.js b/lib/parse.js
index 7ef3fad..5a38ded 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -1,14 +1,16 @@
 /**
  * # PARSE
- * Copyright(c) 2017 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Collection of static functions related to parsing strings
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function PARSE() {}
 
     /**
@@ -114,7 +116,7 @@
 
         pattern = '[';
 
-        JSUS.each(separators, function(s) {
+        separators.forEach(function(s) {
             if (s === ' ') s = '\\s';
 
             pattern += s;
@@ -248,7 +250,7 @@
                     return value;
                 }
                 else if (value.substring(0, len_func) === PARSE.marker_func) {
-                    return JSUS.eval(value.substring(len_prefix));
+                    return _J.eval(value.substring(len_prefix));
                 }
                 else if (value.substring(0, len_null) === PARSE.marker_null) {
                     return null;
@@ -470,7 +472,7 @@
         if ('undefined' === typeof available) {
             available = expr;
         }
-        else if (JSUS.isArray(available)) {
+        else if (_J.isArray(available)) {
             if (available.length === 0) return solution;
             begin = Math.min.apply(null, available);
             end = Math.max.apply(null, available);
@@ -619,11 +621,11 @@
             throw new Error('PARSE.range: invalid dot found: ' + expr);
         }
 
-        if (JSUS.isArray(available)) {
+        if (_J.isArray(available)) {
             i = -1, len = available.length;
             for ( ; ++i < len ; ) {
                 x = parseInt(available[i], 10);
-                if (JSUS.eval(expr.replace(/x/g, x))) {
+                if (_J.eval(expr.replace(/x/g, x))) {
                     solution.push(x);
                 }
             }
@@ -631,7 +633,7 @@
         else {
             while (!available.isFinished()) {
                 x = parseInt(available.next(), 10);
-                if (JSUS.eval(expr.replace(/x/g, x))) {
+                if (_J.eval(expr.replace(/x/g, x))) {
                     solution.push(x);
                 }
             }
@@ -709,6 +711,14 @@
         };
     }
 
-    JSUS.extend(PARSE);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(PARSE);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ PARSE, init ];    
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/lib/queue.js b/lib/queue.js
index c41b44d..1eea708 100644
--- a/lib/queue.js
+++ b/lib/queue.js
@@ -1,14 +1,16 @@
 /**
  * # QUEUE
- * Copyright(c) 2015 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Handles a simple queue of operations
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     var QUEUE = {};
 
     QUEUE.getQueue = function() {
@@ -43,7 +45,7 @@
      * @return {boolean} TRUE, if no operation is in progress
      */
     Queue.prototype.isReady = function() {
-        return JSUS.isEmpty(this.inProgress);
+        return _J.isEmpty(this.inProgress);
     };
 
     /**
@@ -63,7 +65,7 @@
             throw new TypeError('Queue.onReady: cb must be function. Found: ' +
                                cb);
         }
-        if (JSUS.isEmpty(this.inProgress)) cb();
+        if (_J.isEmpty(this.inProgress)) cb();
         else this.queue.push(cb);
     };
 
@@ -80,7 +82,7 @@
         if (key && 'string' !== typeof key) {
             throw new Error('Queue.add: key must be string.');
         }
-        key = JSUS.uniqueKey(this.inProgress, key);
+        key = _J.uniqueKey(this.inProgress, key);
         if ('string' !== typeof key) {
             throw new Error('Queue.add: an error occurred ' +
                             'generating unique key.');
@@ -101,7 +103,7 @@
             throw new Error('Queue.remove: key must be string.');
         }
         delete this.inProgress[key];
-        if (JSUS.isEmpty(this.inProgress)) {
+        if (_J.isEmpty(this.inProgress)) {
             this.executeAndClear();
         }
     };
@@ -141,6 +143,14 @@
         }
     };
 
-    JSUS.extend(QUEUE);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(QUEUE);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ QUEUE, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();
diff --git a/lib/random.js b/lib/random.js
index cb3ed5c..861ffd2 100644
--- a/lib/random.js
+++ b/lib/random.js
@@ -1,14 +1,16 @@
 /**
  * # RANDOM
- * Copyright(c) 2017 Stefano Balietti <ste@nodegame.org>
+ * Copyright(c) 2025 Stefano Balietti <ste@nodegame.org>
  * MIT Licensed
  *
  * Generates pseudo-random numbers
  */
-(function(JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function RANDOM() {}
 
     /**
@@ -122,9 +124,9 @@
      */
     RANDOM.sample = function(a, b) {
         var out;
-        out = JSUS.seq(a,b);
+        out = _J.seq(a,b);
         if (!out) return false;
-        return JSUS.shuffle(out);
+        return _J.shuffle(out);
     };
 
     /**
@@ -419,7 +421,7 @@
             if (nSpaces > -1) {
                 nSpaces = chars.charAt(nSpaces + 1);
                 // nSpaces is integer > 0 or 1.
-                nSpaces = JSUS.isInt(nSpaces, 0) || 1;
+                nSpaces = _J.isInt(nSpaces, 0) || 1;
                 if (nSpaces === 1) mask += ' ';
                 else if (nSpaces === 2) mask += '  ';
                 else if (nSpaces === 3) mask += '   ';
@@ -457,6 +459,14 @@
             RANDOM.randomString(RANDOM.randomInt(2,3));
     };
 
-    JSUS.extend(RANDOM);
-
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(RANDOM);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ RANDOM, init ];    
+    }
+
+})();
diff --git a/lib/time.js b/lib/time.js
index d1dc4f9..b92e890 100644
--- a/lib/time.js
+++ b/lib/time.js
@@ -1,15 +1,17 @@
 /**
  * # TIME
- * Copyright(c) 2021 Stefano Balietti
+ * Copyright(c) 2025 Stefano Balietti
  * MIT Licensed
  *
  * Collection of static functions related to the generation,
  * manipulation, and formatting of time strings in JavaScript
  */
-(function (JSUS) {
+(function() {
 
     "use strict";
 
+    var _J, init;
+
     function TIME() {}
 
     function pad(number) {
@@ -132,6 +134,14 @@
     TIME.now = 'function' === typeof Date.now ?
         Date.now : function() { return new Date().getTime(); }
 
-    JSUS.extend(TIME);
+    if ('undefined' !== typeof JSUS) {
+        _J = JSUS;
+        JSUS.extend(TIME);
+    }
+    // Node.JS ESM or CJS
+    else {
+        init = function(J) { _J = J; };
+        module.exports = [ TIME, init ];
+    }
 
-})('undefined' !== typeof JSUS ? JSUS : module.parent.exports.JSUS);
+})();