function updateTscOfferBox() { const title = document.querySelector('[data-tsc-offer-title]'); const text = document.querySelector('[data-tsc-offer-text]'); if (!title || !text) return; fetch('/cart.js') .then(function (response) { return response.json(); }) .then(function (cart) { var qty = 0; cart.items.forEach(function (item) { var productTitle = (item.product_title || '').toLowerCase(); if (productTitle.includes('strap')) { qty += item.quantity; } }); if (qty <= 0) { title.textContent = 'Buy 1, Get 1 FREE'; text.innerHTML = 'Add 1 strap to unlock BOGO'; } else if (qty === 1) { title.textContent = 'Buy 1, Get 1 FREE'; text.innerHTML = 'Add 1 more strap to unlock BOGO'; } else if (qty >= 2 && qty < 5) { var neededB2G3 = 5 - qty; title.textContent = 'Buy 2, Get 3 FREE'; text.innerHTML = 'Add ' + neededB2G3 + ' more strap' + (neededB2G3 === 1 ? '' : 's') + ' to unlock B2G3'; } else if (qty >= 5 && qty < 7) { var neededB3G4 = 7 - qty; title.textContent = 'Buy 3, Get 4 FREE'; text.innerHTML = 'Add ' + neededB3G4 + ' more strap' + (neededB3G4 === 1 ? '' : 's') + ' to unlock B3G4'; } else { title.textContent = 'Best offer unlocked'; text.innerHTML = 'BUY 3 GET 4 FREE is unlocked'; } }); } updateTscOfferBox(); setInterval(updateTscOfferBox, 800); document.addEventListener('click', function () { setTimeout(updateTscOfferBox, 500); setTimeout(updateTscOfferBox, 1200); }); document.addEventListener('change', function () { setTimeout(updateTscOfferBox, 500); setTimeout(updateTscOfferBox, 1200); });