ktyr report

import {
  reactExtension,
  useBuyerJourneyIntercept,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension(
  'purchase.checkout.block.render',
  () => <Extension />,
);

function Extension() {
    useBuyerJourneyIntercept(
        ({ canBlockProgress }) => {
            let errors = [];
            if(address.lastName?.length > 10){
                errors.push({
                    message : '姓を10文字以内で入力してください',
                    target  : '$.cart.deliveryGroups[0].deliveryAddress.lastName'
                });
            }
            /* エラーがあればブロック */
            if(canBlockProgress && errors.length){
                return {
                    behavior : 'block',
                    reason   : 'Invalid length',
                    errors   : errors
                };
            }else{
                return {
                    behavior : 'allow'
                };
            }
        }
    );
}