WooCommerce auto-update cart when quantity changed

functions.php

/**
 * Auto update cart after quantity change
 *
 * @return  string
 **/
add_action( 'wp_footer', 'cart_update_qty_script' );
function cart_update_qty_script() {
    if (is_cart()) :
    ?>
    <script>
        jQuery('div.woocommerce').on('change', '.qty', function(){
            jQuery("[name='update_cart']").trigger("click"); 
        });
    </script>
    <?php
    endif;
}

works perfectly, thanks

Hi,
I was using your code in combination with a code to transform the quantity input to a dropdown (found it here: https://www.vanpattenmedia.com/2014/code-snippet-woocommerce-quantity-select-field) and the combination worked well until woocommerce version 3.0.

With woocommerce 3.0.X, it works only for every second update. So if I change the quantity, it does not update. If I change it again, it does update. If I change it a third time, it does nothing and if I change it a forth time, is does update. If I dont use the dropdown code, it updates every time. Any idea how to fix this? Many thanks!

In addition to my previous post: I have no skills in javascript at all, but tried some code and the following worked on desktop and on mobile, but I am sure that this is really bad coded :)
Could you please give me a hint how to edit the code in order to get a proper solution? Many thanks in advance!

add_action( 'wp_footer', 'cart_update_qty_script' ); function cart_update_qty_script() { if (is_cart()) : ?> <script> jQuery('div.woocommerce').on('click', '.qty', function(){ jQuery("[name='update_cart']").trigger("click"); }); jQuery('div.woocommerce').on('change', '.qty', function(){ jQuery("[name='update_cart']").trigger("click"); }); </script> <?php endif; }

Hey @Anikora, I've had the same problem. I've slightly changed the original poster his code:

add_action( 'wp_footer', 'cart_update_qty_script' ); function cart_update_qty_script() { if (is_cart()) : ?> <script> jQuery('div.woocommerce').on('click', '.quantity .button', function(){ jQuery("[name='update_cart']").trigger("click"); }); </script> <?php endif; }

Hope this fix your problem.

Hi there. If it helps anyone, to solve the 'it works every second time' issue I had to...

Use a more specific selector:
jQuery('div.woocommerce').on('click', 'input.qty', function(){

remove the 'disabled' attribute from the Update Cart button before applying the click trigger:
jQuery("[name='update_cart']").removeAttr("disabled").trigger("click");