E-Commerce JavaScript Tutorial – Shopping Cart from Scratch

In this tutorial, we will create a shopping cart from scratch using JavaScript. We will be using the HTML5 and JavaScript APIs to create a simple shopping cart.

The first thing we need to do is create the HTML for our shopping cart. We will need a form to add items to our cart, and a table to display the items in our cart.

Now that we have our HTML in place, we can start writing our JavaScript code. We will need to create a function to add items to our cart, and a function to display the items in our cart.

function addItem(item, quantity) {

var tr = document.createElement(“tr”);

var td = document.createElement(“td”);

td.innerHTML = item;

td.setAttribute(“data-quantity”, quantity);

tr.appendChild(td);

var table = document.getElementById(“cart”);

table.appendChild(tr);

}

function displayCart() {

var table = document.getElementById(“cart”);

var tr = table.getElementsByTagName(“tr”);

var data = [];

for (var i = 0; i < tr.length; i++) { var td = tr[i].getElementsByTagName("td")[0]; data.push(td.innerHTML); } var html = ""; for (var i = 0; i < data.length; i++) { html += "

“;