make some overall QoL improvements

2026-09-30 16:44:37 +02:00
parent c69070a6e6
commit 20ad835205
2 changed files with 101 additions and 0 deletions
@@ -0,0 +1,40 @@
+const focusableSelector = 'a[href], button:not([disabled]), input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"])';
+const stack = [];
+
+function focusables(modal) {
+    return [...modal.querySelectorAll(focusableSelector)].filter(element =>
+        element.getClientRects().length && !element.closest('.hidden, [hidden]'));
+}
+
+export function openModal(modal, preferredFocus) {
+    const previous = document.activeElement;
+    modal.classList.remove('hidden');
+    stack.push({modal, previous});
+    (preferredFocus || focusables(modal)[0] || modal.querySelector('[role="dialog"]'))?.focus();
+}
+
+export function closeModal(modal) {
+    const index = stack.findLastIndex(entry => entry.modal === modal);
+    if (index < 0) return;
+    const [{previous}] = stack.splice(index, 1);
+    modal.classList.add('hidden');
+    if (index === stack.length) {
+        const target = stack.length ? focusables(stack.at(-1).modal)[0] : previous;
+        if (target?.isConnected) target.focus();
+    }
+}
+
+export function topModal() { return stack.at(-1)?.modal || null; }
+
+document.addEventListener('keydown', event => {
+    if (event.key !== 'Tab' || !stack.length) return;
+    const modal = topModal();
+    const elements = focusables(modal);
+    if (!elements.length) { event.preventDefault(); modal.querySelector('[role="dialog"]')?.focus(); return; }
+    const first = elements[0], last = elements.at(-1);
+    if (event.shiftKey && (document.activeElement === first || !modal.contains(document.activeElement))) {
+        event.preventDefault(); last.focus();
+    } else if (!event.shiftKey && (document.activeElement === last || !modal.contains(document.activeElement))) {
+        event.preventDefault(); first.focus();
+    }
+}, true);