Jan 28, 2026 • by Sarah Chen
Optimizing User Journeys
The "Add to Cart" button is the most critical interaction in e-commerce. But are you tracking it correctly?
Common Pitfalls
Many implementations rely on simple click listeners. However, a click doesn't always mean an item was added. What if the API fails? What if the variant is out of stock?
The Solution: Custom Events
Instead of auto-event tracking, developers should push a specific event to the Data Layer only after the backend confirms success:
window.dataLayer.push({
event: "add_to_cart",
ecommerce: {
items: [{
item_name: "Premium Widget",
price: 99.00
}]
}
});
This ensures your analytics match your actual sales data.