CODEWITHSUNDEEP
javascriptregex
Abhijit Borade
Abhijit Borade

Reputation: 492

Want this regex work for min 8 characters. No Max Limit

My Regex: ^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])

It accepts at least 1 lowercase letter, 1 uppercase letter, 1 number and 1 special character.

I want this to work for minimum 8 characters. Should not match if string length less than 8.

I have tried (^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])){8,} this. But it still accepts lengths less than 8 Abc@123.

Upvotes: 2

Views: 1471

Answers (2)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626950

You appended the limiting quantifier to a capture group 1 (around the whole pattern) meaning you want to repeat the lookahead checks 8 or more times.

Either add one more lookahead:

/^(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])/
  ^^^^^^^^^

See the regex demo.

Alternatively, you may add .{8,} at the end

/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&]).{8,}/
                                               ^^^^^

See this regex demo.

And no need to repeat the $ character inside the character class ([$@$!%*?&] -> [@$!%*?&]), unless you meant something else.

The lookahead at the start variation may turn out preferable in cases when the string won't match due to its length.

console.log(/^(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])/.test("1sD$"))
console.log(/^(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])/.test("1sD$2sD$"))

Upvotes: 3

S M
S M

Reputation: 3233

Minimum 8 characters at least 1 Alphabet and 1 Number:

"^(?=.*[A-Za-z])(?=.*\d)[A-Za-z\d]{8,}$"

Minimum 8 characters at least 1 Alphabet, 1 Number and 1 Special Character:

"^(?=.*[A-Za-z])(?=.*\d)(?=.*[$@$!%*#?&])[A-Za-z\d$@$!%*#?&]{8,}$"

Minimum 8 characters at least 1 Uppercase Alphabet, 1 Lowercase Alphabet, 1 Number and 1 Special Character:

"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])[A-Za-z\d$@$!%*?&]{8,}"

Upvotes: 0

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