01. Coffee Bill JS Advanced Retake - 18 April 2019

 function addProduct() {
            let [productElem, priceElem] = Array.from(document.querySelectorAll('input'));
            let tBodyElem = document.getElementById('product-list');
            let totalPriceElem = document.querySelector('tfoot').lastElementChild.lastElementChild;
            const productName = productElem.value;
            const productPrice = Number(priceElem.value);
            if (productName && productPrice > 0) {
                let trElem = document.createElement('tr');
                trElem.innerHTML = `<td>${productName}</td><td>${productPrice}</td>`;
                tBodyElem.appendChild(trElem);
                totalPriceElem.textContent = Number(totalPriceElem.textContent) + productPrice;
                productElem.value = '';
                priceElem.value = '';
            }
        }