xamxam/app/templates/public/repertoire.php

<main class="search-main" id="main-content">
    <h1 class="sr-only">Répertoire</h1>
    <span id="rep-indicator" class="rep-indicator htmx-indicator" aria-hidden="true"></span>
    <?php include APP_ROOT . '/templates/partials/repertoire-index.php'; ?>
</main>
<!-- Student popover -->
<div id="student-popover" class="student-popover" hidden aria-live="polite"></div>

<script src="/assets/js/htmx.min.js"></script>
<script>
(function () {
    var popover = document.getElementById('student-popover');
    var currentAnchor = null;

    function positionPopover(anchor) {
        var rect   = anchor.getBoundingClientRect();
        var scrollY = window.scrollY || 0;
        var scrollX = window.scrollX || 0;
        var left = rect.right + scrollX + 12;
        var top  = rect.top  + scrollY;
        if (left + 300 > window.innerWidth + scrollX) {
            left = rect.left + scrollX - 312;
        }
        popover.style.left = left + 'px';
        popover.style.top  = top  + 'px';
    }

    function showPreview(anchor) {
        var tplId = anchor.dataset.preview;
        if (!tplId) return;
        var tpl = document.getElementById(tplId);
        if (!tpl) return;
        popover.innerHTML = '';
        popover.appendChild(tpl.content.cloneNode(true));
        positionPopover(anchor);
        popover.hidden = false;
    }

    function hidePreview() {
        popover.hidden = true;
        currentAnchor = null;
    }

    document.body.addEventListener('mouseenter', function (e) {
        var a = e.target.closest('[data-preview]');
        if (!a) return;
        currentAnchor = a;
        showPreview(a);
    }, true);

    document.body.addEventListener('mouseleave', function (e) {
        var a = e.target.closest('[data-preview]');
        var p = e.target.closest('#student-popover');
        if (!a && !p) return;
        setTimeout(function () {
            if (!document.querySelector('[data-preview]:hover') &&
                !document.querySelector('#student-popover:hover')) {
                hidePreview();
            }
        }, 120);
    }, true);
}());
</script>