Switch to rollup for bundling

js/gui/element.mjs

@@ -0,0 +1,25 @@
+const defaultOptions = {
+	draw: true // Whether the element itself will be rendered.
+}
+
+export default class GuiElement {
+	constructor(x, y, w, h, options) {
+		this.x = x;
+		this.y = y;
+		this.w = w;
+		this.h = h;
+		this.children = new Set();
+		this.parent = null;
+
+		this.options = Object.assign(options, defaultOptions);
+	}
+
+	append(element) {
+		this.children.add(element);
+		element.parent = this;
+	}
+
+	clear() {
+		this.children.clear();
+	}
+}