Shopify.getCart() returns undefined but open a alert message with cart item count

[tsuj]

I am trying to get product info that is added to cart. Shopify.getCart() function returns undefined but opens an alert message saying "there is 1 item in the cart". How to get the cart details using this? any help appreciated 

[Jesse_Michel]

Hey @tsuj. Thanks for this question! I had the exact same one. Did you ever get this sorted out?

I can call the function but it always alerts the value, I just want to set it to a variable!

[tsuj]

Turns out it's actually useless unless you do any tweak on the theme. I have used the ajax API for the same functionality. It's pretty flexible. 

[MathewsJoseph]

Shopify.getCart() returns a promise. So, you can use the following to get data:
Shopify.getCart(function (cart){

//here you have the cart object.

console.log(cart);

})

This won't fire up the alert.