如 #/pay/pay-fail-refund/pay-refund-fail-interface/ZF19041100024 拿到单独的 ZF19041100024
const approval = window.location.hash;
const billCode = approval.split(’/’);
billCode[4] // ZF19041100024
billCode[3] // pay-refund-fail-interface
billCode[2] // pay-fail-refund
billCode[1] //pay
billCode[0] //#
可以根据自己需要悬着哪个值。。。。。。