Remove incorrect claim that node lists aren't iterable

Closes marijnh#529

Author: marijnh

14_dom.md

@@ -221,8 +221,8 @@ it has found one:
 ```{sandbox: "homepage"}
 function talksAbout(node, string) {
   if (node.nodeType == Node.ELEMENT_NODE) {
-    for (let i = 0; i < node.childNodes.length; i++) {
-      if (talksAbout(node.childNodes[i], string)) {
+    for (let child of node.childNodes) {
+      if (talksAbout(child, string)) {
         return true;
       }
     }
@@ -236,12 +236,6 @@ console.log(talksAbout(document.body, "book"));
 // → true
 ```
 
-{{index "childNodes property", "array-like object", "Array.from function"}}
-
-Because `childNodes` is not a real array, we cannot loop over it with
-`for`/`of` and have to run over the index range using a regular `for`
-loop or use `Array.from`.
-
 {{index "nodeValue property"}}
 
 The `nodeValue` property of a text node holds the string of text that

html/errata.html

@@ -67,6 +67,12 @@ <h2>Chapter 11</h2>
 
 <h2>Chapter 14</h2>
 
+<p><strong>Page 231</strong> <em>Moving Through the Tree</em>: Below
+the code example, the text claims
+that <code>for</code>/<code>of</code> loops don't work on DOM child
+lists. But in current (even as of the book's release) browsers they
+do.</p>
+
 <p><strong>Page 234</strong> (2nd) <em>Creating Nodes</em>: In the
 code, “edition” is misspelled as “editon”.</p>