closes #495

2-ui/1-document/05-basic-dom-node-properties/2-tree-info/solution.md

@@ -0,0 +1,19 @@
+Let's make a loop over `<li>`:
+
+```js
+for (let li of document.querySelectorAll('li')) {
+  ...
+}
+```
+
+In the loop we need to get the text inside every `li`. We can read it directly from the first child node, that is the text node:
+
+```js
+for (let li of document.querySelectorAll('li')) {
+  let title = li.firstChild.data;
+
+  // title is the text in <li> before any other nodes
+}
+```
+
+Then we can get the number of descendants `li.getElementsByTagName('li')`.