General developer forum

Hi,

You can use the jqueryui and https://jqueryui.com/sortable/

They've also Moodle plugin that do similar actions like teambuilder.
You can sort questions and answers.
Analyse the code is very instructive.
....
$PAGE->requires->jquery();
$PAGE->requires->jquery_plugin('ui');
$PAGE->requires->jquery_plugin('ui-css');
...

echo html_writer::start_div('sortable');

https://github.com/netspotau/moodle-mod_teambuilder/blob/master/view.php
ajax.php also

I hope it's help.

Dominique.