Function trapFocusInModal

public/js/main.js:444–469

(modal)

}

function trapFocusInModal(modal) {
  if (!modal || modal.__frTrapBound) return;
  modal.__frTrapBound = true;
  modal.addEventListener('keydown', (e) => {
    if (e.key !== 'Tab') return;
    if (getTopmostModal() !== modal) return;
    const focusables = getFocusableElements(modal);
    if (!focusables.length) {
      e.preventDefault();
      modal.focus();
      return;
    }
    const first = focusables[0];
    const last = focusables[focusables.length - 1];
    const active = document.activeElement;
    if (e.shiftKey) {
      if (active === first || !modal.contains(active)) {
        e.preventDefault();
        last.focus();
      }
    } else if (active === last || !modal.contains(active)) {
      e.preventDefault();
      first.focus();
    }
  }, true);
}

function applyModalA11yAttrs(modal) {
  if (!modal) return;