diff --git a/src/Parser.ts b/src/Parser.ts
index 3ddd88b..deef96c 100644
--- a/src/Parser.ts
+++ b/src/Parser.ts
@@ -1,6 +1,7 @@
 import {
   DefaultTreeCommentNode,
   DefaultTreeDocument,
+  DefaultTreeDocumentType,
   DefaultTreeElement,
   DefaultTreeNode,
   DefaultTreeTextNode,
@@ -73,36 +74,32 @@ class Parser {
       return;
     }
 
-    for (const treeNode of tree) {
-      const node = treeNode as DefaultTreeElement;
-
-      const pugNode = this.parseHtmlNode(node, indentLevel);
+    for (const treeNode of tree as DefaultTreeElement[]) {
+      const pugNode = this.parseHtmlNode(treeNode, indentLevel);
       if (pugNode) {
         this.pug += `\n${pugNode.toString()}`;
       }
 
       if (
-        Array.isArray(node.childNodes) &&
-        node.childNodes.length &&
-        !hasOnlyTextChildNode(node)
+        Array.isArray(treeNode.childNodes) &&
+        treeNode.childNodes.length &&
+        !hasOnlyTextChildNode(treeNode)
       ) {
-        yield* this.walk(node.childNodes, indentLevel + 1);
+        yield* this.walk(treeNode.childNodes, indentLevel + 1);
       }
     }
   }
+
   /**
    * Creates a [PugNode] from a #documentType element.
    *
    * @param indentLevel
    */
-  private createDoctypeNode = (indentLevel: number): PugNode =>
-    new PugNode(
-      Nodes.Doctype,
-      'doctype html',
-      indentLevel,
-      this.tabs,
-      this.commas,
-    );
+  private createDoctypeNode = (
+    node: DefaultTreeDocumentType,
+    indentLevel: number,
+  ): PugNode =>
+    new PugNode(Nodes.Doctype, node.name, indentLevel, this.tabs, this.commas);
 
   /**
    * Creates a [PugNode] from a #comment element.
@@ -142,6 +139,7 @@ class Parser {
    * Converts an HTML element into a [PugNode].
    *
    * @param node
+   * @param indentLevel
    */
   private createElementNode(
     node: DefaultTreeElement,
@@ -178,7 +176,10 @@ class Parser {
   ): PugNode | void {
     switch (node.nodeName) {
       case Nodes.Doctype:
-        return this.createDoctypeNode(indentLevel);
+        return this.createDoctypeNode(
+          node as DefaultTreeDocumentType,
+          indentLevel,
+        );
       case Nodes.Comment:
         return this.createCommentNode(
           node as DefaultTreeCommentNode,
diff --git a/src/PugNode.ts b/src/PugNode.ts
index dce06ae..a27dc35 100644
--- a/src/PugNode.ts
+++ b/src/PugNode.ts
@@ -28,8 +28,12 @@ class PugNode {
     this.name = name;
     this.value = value;
     this.indentLevel = indentLevel;
-    if (tabs) { this.tabs = tabs; }
-    if (commas) { this.commas = commas; }
+    if (tabs) {
+      this.tabs = tabs;
+    }
+    if (commas) {
+      this.commas = commas;
+    }
   }
 
   /**
@@ -105,9 +109,7 @@ class PugNode {
         const hasClassOrId = this.attributes.some((attr: Attribute) =>
           ['class', 'id'].includes(attr.name),
         );
-        if (hasClassOrId) {
-          return '';
-        }
+        return hasClassOrId ? '' : this.name;
       }
       default:
         return this.name;