Turn on debugging using wp-config.php
By setting the SCRIPT_DEBUG flag in your wp-config.php file, you can enable WooCommerce POS debugging. This will load the unminified script files and also enable debug messages in the browser console.
Turn on debugging using the browser console
If you do not have access to the wp-config.php file, you can enable debug messages by adding a
debug flag to the Local Storage.
This can be done by entering
localStorage.setItem('debug', '*') into the console.
Now refresh the page and debugging will be on. Console logging can consume browser resources so you'll probably want to turn debugging off once you are finished with it.
To turn debugging off, simply enter
localStorage.removeItem('debug') into the console and refresh the page.