How to Add WooCommerce Quantity Plus + and Minus – Buttons on Product Page

WooCommerce can be used with plenty of WordPress themes, and every theme has a different way of laying out and styling the different features. In this post, we will talk about the quantity feature, more specifically about the buttons that we click to increase and decrease the quantity of a product before adding it to the Cart, or while updating the Cart. While in many themes, these WooCommerce quantity buttons are denoted by the “+” and “-” signs to add and reduce the quantity respectively, themes such as the Storefront theme display the up and down arrows for the same, by default (see image below).  For such themes, let’s explore how to add + and – quantity increment buttons for woocommerce product page.

There are multiple ways of doing this i.e. using plugins or code snippets.

Using code snippets to add plus + and minus – buttons to WooCommerce quantity input on product page

You can use a simple code snippet consisting of PHP, JQuery and CSS to add plus (+) and (-) buttons in place of the up and down arrows to increase and decrease the quantity respectively. Start with adding the below PHP & JQuery snippets to the functions.php file of your child theme:

add_action( 'woocommerce_after_add_to_cart_quantity', 'ts_quantity_plus_sign' );
 
function ts_quantity_plus_sign() {
   echo '<button type="button" class="plus" >+</button>';
}
 
add_action( 'woocommerce_before_add_to_cart_quantity', 'ts_quantity_minus_sign' );

function ts_quantity_minus_sign() {
   echo '<button type="button" class="minus" >-</button>';
}
 
add_action( 'wp_footer', 'ts_quantity_plus_minus' );
 
function ts_quantity_plus_minus() {
   // To run this on the single product page
   if ( ! is_product() ) return;
   ?>
   <script type="text/javascript">
          
      jQuery(document).ready(function($){   
          
            $('form.cart').on( 'click', 'button.plus, button.minus', function() {
 
            // Get current quantity values
            var qty = $( this ).closest( 'form.cart' ).find( '.qty' );
            var val   = parseFloat(qty.val());
            var max = parseFloat(qty.attr( 'max' ));
            var min = parseFloat(qty.attr( 'min' ));
            var step = parseFloat(qty.attr( 'step' ));
 
            // Change the value if plus or minus
            if ( $( this ).is( '.plus' ) ) {
               if ( max && ( max <= val ) ) {
                  qty.val( max );
               } 
            else {
               qty.val( val + step );
                 }
            } 
            else {
               if ( min && ( min >= val ) ) {
                  qty.val( min );
               } 
               else if ( val > 1 ) {
                  qty.val( val - step );
               }
            }
             
         });
          
      });
          
   </script>
   <?php
}

After adding the above PHP and JQuery code snippets, we will refresh the product page:

You can see that the plus (+) and minus (-) buttons have been added next to the quantity input element. However, we need to add some styles / CSS in order for the buttons to render properly. If you’re using popular themes such as the StoreFront theme, you will have an option to add additional CSS by clicking on Customize on the front-end itself.

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.single-product div.product form.cart .quantity {
    float: none;
    margin: 0;
    display: inline-block;
}

You will see that the buttons now appear on both sides of the quantity input:

In this way, you can use code snippets with ease to add these buttons on the product page. However, in order to display plus(+) and minus(-) quantity selector button on the Cart page, it would be a good idea to use plugins which work for both purposes instead of using these code snippets.

Using plugins to add plus + and minus – buttons to the quantity input on the product page and Cart page

In order to add buttons on the product as well as the Cart page, there are two free plugins available:

Qty Increment Buttons for WooCommerce Plugin: This is an easy-to-use plugin that renders the buttons on the Shop, Product and Cart pages by default. You have an option to render the buttons on pages such as the Category page (along with the Product page) depending on what you choose under “Archives Display”. Choosing the “Category” option however only renders the buttons on the Category, Product and Cart pages and not the Shop page.

You can see that there are various ways you can style the buttons too.
Although this plugin has not been updated in over 3 years, it was tested and worked properly on WordPress 6.3.1 with the Storefront theme active. The “Load on all pages” option however renders the buttons only on the Product and Cart pages, and not all pages as the label suggests.

SMNTS WooCommerce Quantity Buttons Plugin: This is also an easy plugin but has very few options in terms of styling. The only advantage it offers over the previous plugin is that it comes with an option of disabling the buttons on either the Cart or the Product page (if there is such a requirement) using just one line of code, as mentioned on the plugin homepage. It also manages to remove the default up and down arrows inside the quantity input element.

In this way, you can use plugins or code snippets based on your requirements to add plus + and minus – buttons to the quantity input in WooCommerce.