HTML Render with example UI

src/main/java/org/openautonomousconnection/htmlparser/dom/Document.java

@@ -0,0 +1,35 @@
+package org.openautonomousconnection.htmlparser.dom;
+
+import java.util.ArrayDeque;
+import java.util.Deque;
+
+public final class Document {
+    private final Element root;
+
+    public Document(Element root) {
+        this.root = root;
+    }
+
+    public Element getRoot() { return root; }
+
+    public Element createElement(String tag) { return new Element(tag); }
+    public TextNode createTextNode(String text) { return new TextNode(text); }
+
+    public Element getElementById(String id) {
+        if (id == null) return null;
+        Deque<DomNode> stack = new ArrayDeque<>();
+        stack.push(root);
+        while (!stack.isEmpty()) {
+            DomNode n = stack.pop();
+            if (n instanceof Element e) {
+                if (id.equals(e.id())) return e;
+            }
+            for (int i = n.getChildren().size() - 1; i >= 0; i--) stack.push(n.getChildren().get(i));
+        }
+        return null;
+    }
+
+    public Element querySelector(String selector) {
+        return DomQuery.querySelector(root, selector);
+    }
+}