practice-time-shopping-list-wender-azevedo/app.js

document.addEventListener("DOMContentLoaded", function() {
    const quantityInput = document.querySelector(".shopping-form-quantity-input");
    const incrementButton = document.querySelector(".shopping-form-increment-button");
    const decrementButton = document.querySelector(".shopping-form-decrement-button");

    incrementButton.addEventListener("click", incrementQuantity);
    decrementButton.addEventListener("click", decrementQuantity);

    function incrementQuantity() {
        const currentValue = Number(quantityInput.value);
        const newValue = currentValue + 1;

        quantityInput.value = newValue;
    }

    function decrementQuantity() {
        const currentValue = Number(quantityInput.value);
        const newValue = currentValue - 1;

        if (newValue > 0) {
            quantityInput.value = newValue;
        }
        
    }
});