How to auto update cart after the product quantity change in woocommerce?

Watson

I used this code within the function.php and it is working, But update occurs only if I change the quantity twice. Do you know how to fix that?

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;
}

anderson

You need to remove the "disabled" propriety before triggering the click

<script>
    jQuery('div.woocommerce').on('change', '.qty', function(){
        jQuery("[name='update_cart']").prop("disabled", false);
        jQuery("[name='update_cart']").trigger("click"); 
    });
    </script>