Add Copy Button to Blogger Blockquote

As mentioned last time, I went back to the approach of using blockquote to display code.
Well, it's still inconvenient without a copy button.

Let's go back to the previous copy button approach. The copy button functionality still needs to be implemented under the premise of a double-layer element structure.
So what should we wrap around the blockquote? After looking around, I decided to wrap a p element around it
GPT-4o in Poe explaining differences between HTML p, div, span tags with copy example

The specific implementation is a combination of previous approaches.
Already submitted to github

Code editor highlighting the blockquote-add-copy-button.js script reference