woocommerce/assets/js/frontend/credit-card-form.min.js

jQuery(function(a){a(".wc-credit-card-form-card-number").payment("formatCardNumber"),a(".wc-credit-card-form-card-expiry").payment("formatCardExpiry"),a(".wc-credit-card-form-card-cvc").payment("formatCardCVC"),a("body").on("updated_checkout",function(){a(".wc-credit-card-form-card-number").payment("formatCardNumber"),a(".wc-credit-card-form-card-expiry").payment("formatCardExpiry"),a(".wc-credit-card-form-card-cvc").payment("formatCardCVC")})});