João Carmo Pereira

This plugin will add a new copy to clipboard functionality to Gutenberg Code Block. 
It will add a copy button at the top right corner of the block. After clicked, it will select the text, copy to clipboard, and after copy it will deselect the copied text. No markup here.
This plugin makes use of two javascript libraries: 
Clipboard.js and Prism.js

Carmo Copy to Clipboard

This plugin will add a new copy to clipboard functionality to Gutenberg Code Block.

singhalavi

This is the plugin to copy text to clipboard on click of a button on desktop browsers and mobile web browsers. It usage flash to auto copy on click of the button, for the browsers where flash is not available, it shows the popup with pre-selected text and user can copy it easily. 
– Flexibility to change caption, width, height of the button. 
– Option to add a suffix to copied text, by default suffixes your blog url. 
– Option to call a javascript method on click of the button, by default sends Click event to your Google Analytics account.
It usage LMCButton, http://www.lettersmarket.com/view_blog/a-3-copy_to_clipboard_lmcbutton.html to copy text using flash and http://www.featureblend.com/javascript-flash-detection-library.html to detect flash.
<h4>Sample Use</h4>
[pw-clippy caption=”Copy”]Text to Copy goes here[/pw-clippy]
For more options checkout Installation section.
For more information on how to use or to report any issues/enhancement requests visit http://puzzlersworld.com/wordpress-copy-to-clipboard-plugin/

Copy To Clipboard – mobile + web

Copy text to clipboard on click of a button on desktop browsers and mobile web browsers by wrapping the text in [pw-clippy] shortcode.

Carmo Copy to Clipboard vs Copy To Clipboard – mobile + web