Extending Structure Field

#1

Hi,

in Kirby 2 we extended the structure field (by first copying the folder from /panel to /site/fields and then modifying the files) to add the DataTable-Library (JS) to it (showing/hiding columns, sorting columns, pagination, search etc.).

How can we achieve in Kirby 3 to get a similar customization? The docs on custom fields are not really clear on that to me.