Script to check if there are other scripts

Question

When archiving web pages, dynamic content has to be treated differently. How do I detect whether a page uses any JavaScript?

This will end up in a browser extension, so it probably doesn't need to exclude itself from the findings.

Answer 1

Simply checking for <script> tags should be fine.

if (document.querySelectorAll("script").length) {
    //there are scripts on this page
}

You could scan the entire page for onclick, etc handlers in HTML tags, but that would be slow for a big page.