Tell us what’s happening:
Describe your issue in detail here.
Your code so far
<!--
<h1>Hello World</h1> <!--this mean HelloWorld-->
<h2>CatPhotoApp</h2> <!--that's it-->
<p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
-->
Your browser information:
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36
It is good exercice to describe the issue you meet, and not just post the code and make the people guess what happens.
Did you watch the error messages you have after running the test? Let’s see one by one.
Your h1 element should be visible on the page by uncommenting it.
Your code:
<!--
<h1>Hello World</h1> <!--this mean HelloWorld-->
To explain you what happens here it is simple. At the first line you have <!-- which opens the comment. The comment will end until the first closing it meets, here in the second line. If you watch the code in the editor, you can see the two first lines in green.
Second error message you have:
No trailing comment tags should be visible on the page (i.e. -->).
You have many comments in your code, and the exercice is about to uncomment the code. Do you understand the issue?