问题
I'm not good at regular expression. I got code to validate dd/mm/yyyy format which also validates leap year, I tried to modify to get it work for mm/dd/yyyy, but they all failed.
Can some one change it to validate mm/dd/yyyy format?
Regular Expression:
^(((0[1-9]|[12]\d|3[01])/(0[13578]|1[02])/((19|[2-9]\d)\d{2}))|((0[1-9]|[12]\d|30)/(0[13456789]|1[012])/((19|[2-9]\d)\d{2}))|((0[1-9]|1\d|2[0-8])/02/((19|[2-9]\d)\d{2}))|(29/02/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$
Answer Hi All, thanks for the help from all of you, finally parsing again the regular expression, i got my answer to validate mm/dd/yyyy format
Regular Expression:
/^(((0[13578]|1[02])/(0[1-9]|[12]\d|3[01])/((19|[2-9]\d)\d{2}))|((0[13456789]|1[012])/(0[1-9]|[12]\d|30)/((19|[2-9]\d)\d{2}))|(02/(0[1-9]|1\d|2[0-8])/((19|[2-9]\d)\d{2}))|(02/29/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$/g
回答1:
Try with
function validateDate(testdate) {
var date_regex = /^(0[1-9]|1[0-2])\/(0[1-9]|1\d|2\d|3[01])\/(19|20)\d{2}$/ ;
return date_regex.test(testdate);
}
But better to use regular expression use Date object from your date string and then validate it.
来源：https://stackoverflow.com/questions/17503043/javascript-regular-expression-to-validate-date-in-mm-dd-yyyy-format