How to place the app in a particular form

The app automatically tries to find a cart form and add the calculator inside that form.

This is the optimal solution on most cases but sometimes, when there are several cart forms, the app does not appear in the desired form.

We can tell the widget which form we want to use by adding the CSS class cbb-shipping-rates-cart-form to it, as in the following example:

    <form action="/cart" method="post" id="cartform" class="cbb-shipping-rates-cart-form" >
      <ul>
        {% for item in cart.items %}
        <li class="item product-{{ item.product.handle }}">
          <div class="image">
            ...