fixes #1469

2-ui/1-document/02-dom-nodes/article.md

@@ -22,7 +22,13 @@ document.body.style.background = 'red'; // make the background red
 setTimeout(() => document.body.style.background = '', 3000); // return back
 ```
 
-That was just a glimpse of the DOM's power. Soon we'll learn more ways to manipulate the DOM, but first we need to know about its structure.
+Here we used `style.background` to change the background color of `document.body`, but there are many other properties, such as:
+
+- `innerHTML` -- HTML contents of the node.
+- `offsetWidth` -- the node width (in pixels)
+- ...and so on.
+
+Soon we'll learn more ways to manipulate the DOM, but first we need to know about its structure.
 
 ## An example of the DOM
 

2-ui/1-document/03-dom-navigation/article.md

@@ -149,7 +149,7 @@ There are two important consequences:
 The first thing is nice. The second is tolerable, because we can use `Array.from` to create a "real" array from the collection, if we want array methods:
 
   ```js run
-  alert( Array.from(document.body.childNodes).filter ); // now it's there
+  alert( Array.from(document.body.childNodes).filter ); // function
   ```
 
 ```warn header="DOM collections are read-only"
@@ -311,8 +311,9 @@ An example of usage:
 </table>
 
 <script>
-  // get the content of the first row, second cell
-  alert( table.*!*rows[0].cells[1]*/!*.innerHTML ) // "two"
+  // get td with "two" (first row, second column)
+  let td = table.*!*rows[0].cells[1]*/!*;
+  td.style.backgroundColor = "red"; // highlight it
 </script>
 ```