Shopping cart... Total sum

[edbernal]

I have this use case:
I am creating a shopping cart on weweb, I have been able to make the functionality and get to the check out process as shown in the first and second image,

I have a problem trying to add the total dynamically, I created an object type variable so that the product id and the selected quantity are saved dynamically, can anyone help me with ideas to know how I can do the total sum of all the products, thanks all

[luka]

const cart = [
    {
        price: 120,
        amount: 1
    },
    {
        price: 120,
        amount: 1
    },
    {
        price: 120,
        amount: 1
    }
]

let total = 0;

for(const item of cart){
    total += (item.price * item.amount)
}

return total

Replate cart with your array that is formatted like the one in the code

[edbernal]

Hey Luka, thanks for the help here. Im nott sure what im doing wrong in the JS code, i just share you waht i did but i dont have an answer

`const cart = variables[‘9af52da4-3ecf-40be-8f90-36b5befa89c9’];

let total = 0;

for (const item of cart) {
total += (item.price * item.amount);
}

console.log(total);
return total;
``

[Broberto]

I think you should first of all use an array of objects (items), not an object. If you want to do it with your object though, you can use this one-liner formula. I would probably still opt for the array approach as also @luka suggested, as it is more flexible and simpler (no need to to the values() conversion).

values( [your_cart_object_here] ).reduce((partialSum, a) => partialSum + a, 0);

[edbernal]

Thanks for the reply, i tried using an array, but im stuck in the same issue, the Total, how can i do the math (price*qty) an the total SUM, any thought?

[Broberto]

[carrito_array_here].reduce((partialSum, item) => partialSum + item.qty*item.price, 0);