document.addEventListener('variantChange', function(e) { var variant = e.detail.variant; if (!variant) return; var title = document.querySelector('.product-single__title'); if (!title) return; var base = "2020 | Bodet-Herold Physis Extra Brut | Loire"; var hasOnlyDefault = true; if (hasOnlyDefault) { title.textContent = base; return; } var parts = [base]; if (variant.option1) parts.push(variant.option1); if (variant.option2) parts.push(variant.option2); title.textContent = parts.join(' | '); });