Can I add a product to cart in Checkout page?

Technical Q&A
1

Hi guys!

I need to add a product to the ‘cart’ when I click a button in the checkout page, is that possible?

I’ve tried adding via AJAX → cart.js but it’s not working.

*PS: the store is Shopify Plus

2

Hello @will-silveira ,

Using cart.js is the way to go. Don’t forget to reload the page once is done in order to see the changes.

fetch(‘/cart/add.js’, {
method: ‘POST’,
headers: {
‘Content-Type’: ‘application/json’,
},
body: JSON.stringify({ quantity: 1, id: free_variant_id })
})
.then(response => response.json())
.then(response => {
window.location.reload();
})