What is the regex ?

Question

I would like to implement regex in Javascript to compare if my string matches the following pattern -

<digit><digit>/<digit><digit>/<digit><digit><digit><digit>

This is similar to the DD/MM/YYYY format. But I don't want any date specific validations. I just want to check if the string contains digits as per the given pattern.

Thanks!

https://stackoverflow.com/questions/15491894/regex-to-validate-date-format-dd-mm-yyyy Check this. — Abhisek Roy, Feb 22 '18 at 05:28
@AbhisekRoy - This doesn't solve my issue. I am not looking for a date validation. — Archit Arora, Feb 22 '18 at 05:29

score 0 · Accepted Answer · answered Feb 22 '18 at 05:36

0

Something like that?

re = new RegExp(/\d{2}\/\d{2}\/\d{4}/);

"21/02/2017".match(re) /* ["21/02/2018", index: 0, input: "21/02/2018"] */
"21/2/2017".match(re)  /* null */

answered Feb 22 '18 at 05:36

Alexei Danchenkov

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score 0 · Answer 2 · answered Feb 22 '18 at 06:43

Alexei Danchenkov makes good answer, but maybe you also want additional checks for start and the end of the string:

re = new RegExp(/^\d{2}\/\d{2}\/\d{4}$/);

// examples
console.log("21/02/2017".match(re)); /* ["21/02/2018", index: 0, input: "21/02/2018"] */
console.log("21/2/2017".match(re));  /* null */
console.log("21/02/20171".match(re)); /* null */
console.log("21/02/2017 ".match(re)); /* null */
console.log("+21/02/2017".match(re)); /* null */

What is the regex ?

2 Answers2