woocommerce/assets/js/frontend/cart.min.js

jQuery(function(a){return"undefined"==typeof wc_cart_params?!1:(a(document).on("click",".shipping-calculator-button",function(){return a(".shipping-calculator-form").slideToggle("slow"),!1}).on("change","select.shipping_method, input[name^=shipping_method]",function(){var b=[];a("select.shipping_method, input[name^=shipping_method][type=radio]:checked, input[name^=shipping_method][type=hidden]").each(function(){b[a(this).data("index")]=a(this).val()}),a("div.cart_totals").block({message:null,overlayCSS:{background:"#fff url("+wc_cart_params.ajax_loader_url+") no-repeat center",backgroundSize:"16px 16px",opacity:.6}});var c={action:"woocommerce_update_shipping_method",security:wc_cart_params.update_shipping_method_nonce,shipping_method:b};a.post(wc_cart_params.ajax_url,c,function(b){a("div.cart_totals").replaceWith(b),a("body").trigger("updated_shipping_method")})}),void a(".shipping-calculator-form").hide())});