My goal is to show the popup when there is no shipping method available.

I know to use trigger updated_checkout but how do I know from that trigger, the shipping method is not available?. so I can trigger to show the popup.

CodePudding user response：

You can trigger update_checkout using $( 'body' ).on( 'updated_checkout',function( data ){}); Try the below code.

function check_shipping_method_available(){
    ?>
    <script type="text/javascript">
        (function( $ ) {
            $( 'body' ).on( 'updated_checkout',function( data ){
                if( !$('.shipping_method').length ){
                    alert('No Shipping method available');
                    // popup code
                }
            } );
        })(jQuery);
    </script>
    <?php
}
add_action( 'wp_footer', 'check_shipping_method_available', 10, 1 );

Tested and works