https://revue-dicila.net/wp-content/themes/education-insight/assets/js/navigation-focus.js?ver=1

1var education_insight_Keyboard_loop = function (elem) {
2  var education_insight_tabbable = elem.find('select, input, textarea, button, a').filter(':visible');
3  var education_insight_firstTabbable = education_insight_tabbable.first();
4  var education_insight_lastTabbable = education_insight_tabbable.last();
5  /*set focus on first input*/
6  education_insight_firstTabbable.focus();
7
8  /*redirect last tab to first input*/
9  education_insight_lastTabbable.on('keydown', function (e) {
10    if ((e.which === 9 && !e.shiftKey)) {
11        e.preventDefault();
12        education_insight_firstTabbable.focus();
13    }
14  });
15
16  /*redirect first shift+tab to last input*/
17  education_insight_firstTabbable.on('keydown', function (e) {
18    if ((e.which === 9 && e.shiftKey)) {
19        e.preventDefault();
20        education_insight_lastTabbable.focus();
21    }
22  });
23
24  /* allow escape key to close insiders div */
25  elem.on('keyup', function (e) {
26    if (e.keyCode === 27) {
27        elem.hide();
28    };
29  });
30};