HTML comment within <script> tags

Question

Are HTML comments within script tags ignored? Or does commented out code not run?
For example:

<script>
<!--
window.onload = alert('test');
-->
</script>

Answer 1

It is ignored.
https://code.sololearn.com/W53RVkVh544O/?ref=app

Answer 2

Thanks. I've seen it being used on a website but it seemed to be done as a form of code obfuscation. It used
unescape('long string of characters');
I assume it's to prevent web scraping maybe.