正则表达式精确匹配 6 位数字，数字之间有任意数量的空格

Question

I recently needed to create a regular expression for OTP values in JavaScript. The input should contain 6 digits with spaces any where in between. I am not regex-savvy at all and even though I tried looking for a better way, I ended up with this:

/^[\d ]*$/

With this I can have spaces with digits but here I don't have control over the number of digits.

Answer 1

Try this:

 let OTPs = [ "123456", "12345", // Invalid "1 2345 6", "1 2 3 4 5 6", "1 2 3 4 5 6", "a 2 b 4 5 6" // Invalid ] let validOTPs = OTPs.filter(otp => otp.match(/^(\d\s*){6}$/g)) console.log(validOTPs)

Answer 2

You also try below regex. See it working at https://regex101.com/r/6rGjOU/1

^(\d(\s+)?){6}$