Added file scripts

package.json

@@ -1,6 +1,6 @@
 {
   "name": "LiteRyzJS",
-  "version": "0.1.0.455",
+  "version": "0.2.0.058",
   "devDependencies": {
     "css-loader": "^7.1.2",
     "sass": "^1.77.8",

src/extensions.js

@@ -7,3 +7,4 @@ import './extensions/math.js';
 import './extensions/object.js';
 import './extensions/string.js';
 import './extensions/window.js';
+import './extensions/file.js';

src/extensions/file.js

@@ -0,0 +1,9 @@
+String.prototype.getFilename = function () {
+  return this.substring(this.lastIndexOf('/') + 1);
+};
+
+String.prototype.getFileExtension = function () {
+  const filename = this.getFilename();
+
+  return filename.substring(filename.lastIndexOf('.') + 1).toLowerCase();
+};

src/extensions/string.js

@@ -77,7 +77,3 @@ String.prototype.toTitleCase = function () {
 
   return result;
 };
-
-String.prototype.getFilename = function () {
-  return this.substring(this.lastIndexOf('/') + 1);
-};