Bank card number, which specifies the character length to split the string

You can use the bank card number formatting function to separate strings with specified characters. Use regular expression replacement. The js code is as follows;

<Script type = "text/javascript">

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

</Script>

Bank card number, which specifies the character length to split the string