Track user activity with custom attributes
cart/update.js
skip_attributes_by_quick
fetch('/cart/update.js', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ attributes: { 'gst_number': '12345', 'skip_attributes_by_quick': 'internal_code' }, note: 'Custom tracking code: ABC123' }) });