add-to-cart

let addtocart_buttons = document.querySelectorAll('.add-to-cart-btn');

addtocart_buttons.forEach((addToCartBtn) => {
    addToCartBtn.addEventListener('click', (button) => {
        let id = button.target.getAttribute('data-id');
        let quantity = button.target.previousElementSibling.value;
        console.log(quantity);

        if (quantity < 0) {
            alert("Please enter a quantity");
        } else {
            let data = new FormData;

            data.append('id', id);
            data.append('quantity', quantity);

            fetch("../../controllers/process-update-cart.php",
                    {
                        method: "POST",
                        body : data
                    })
                .then((response) => {
                    return response.text();
                })
                .then((data_from_fetch) => {
                    console.log(data_from_fetch);
                });
        }
    });
});