Angularjs / js 正则格式化银行卡号

app.filter('splitNumberFilter', [function() {
      return function(content) {
        return content ? content.replace(/\s/g,'').replace(/(\d{4})(?=\d)/g,"$1 ") : content;
      }
}]);

 

// js版本

'1234567890123456'.replace(/\s/g,'').replace(/(\d{4})(?=\d)/g,"$1 ");

// result
"1234 5678 9012 3456"

 

"548481554521515454848798921258740".replace(/(\d{4})(?=\d)/g,"$1-")

"5484-8155-4521-5154-5484-8798-9212-5874-0"