Refactoring: move all code files into a src directory

src/UI/UIElement.ts

@@ -0,0 +1,27 @@
+import BaseUIElement from "./BaseUIElement"
+
+export abstract class UIElement extends BaseUIElement {
+    /**
+     * Should be overridden for specific HTML functionality
+     */
+    protected InnerConstructElement(): HTMLElement {
+        // Uses the old fashioned way to construct an element using 'InnerRender'
+        const innerRender = this.InnerRender()
+        if (innerRender === undefined || innerRender === "") {
+            return undefined
+        }
+        const el = document.createElement("span")
+        if (typeof innerRender === "string") {
+            el.innerHTML = innerRender
+        } else {
+            const subElement = innerRender.ConstructElement()
+            if (subElement === undefined) {
+                return undefined
+            }
+            el.appendChild(subElement)
+        }
+        return el
+    }
+
+    protected abstract InnerRender(): string | BaseUIElement
+}