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document.addEventListener('DOMContentLoaded', function () { const donationCheckbox = document.getElementById('donation-checkbox'); const donationVariantId = 10068320387408; // Your donation product's variant ID if (!donationCheckbox) return; donationCheckbox.addEventListener('change', function () { if (donationCheckbox.checked) { // Add the donation product to the cart fetch('/cart/add.js', { method: 'POST', headers: { 'Content-Type': 'application/json', 'Accept': 'application/json' }, body: JSON.stringify({ items: [{ id: donationVariantId, quantity: 1 }] }) }) .then(res => res.json()) .then(data => { console.log("Donation added:", data); location.reload(); // Reload the page to update cart }) .catch(err => console.error("Error adding donation:", err)); } else { // Remove the donation product from the cart fetch('/cart.js') .then(res => res.json()) .then(cart => { const item = cart.items.find(i => i.variant_id === donationVariantId); if (item) { return fetch('/cart/change.js', { method: 'POST', headers: { 'Content-Type': 'application/json', 'Accept': 'application/json' }, body: JSON.stringify({ id: item.key, quantity: 0 }) }); } }) .then(() => { console.log("Donation removed"); location.reload(); // Reload the page to update cart }) .catch(err => console.error("Error removing donation:", err)); } }); });