Refactored js file structure to be standard throughout app

Still work to be done but a good start in standardisation.

resources/assets/js/services/dom-polyfills.js

@@ -0,0 +1,22 @@
+/**
+ * Polyfills for DOM API's
+ */
+
+// https://developer.mozilla.org/en-US/docs/Web/API/Element/matches
+if (!Element.prototype.matches) {
+    Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/API/Element/closest#Browser_compatibility
+if (!Element.prototype.closest) {
+    Element.prototype.closest = function (s) {
+        var el = this;
+        var ancestor = this;
+        if (!document.documentElement.contains(el)) return null;
+        do {
+            if (ancestor.matches(s)) return ancestor;
+            ancestor = ancestor.parentElement;
+        } while (ancestor !== null);
+        return null;
+    };
+}