What is the regex for password?
What is the regex for password?
Use RegEx To Test Password Strength In JavaScript
| RegEx | Description |
|---|---|
| (?=.*[0-9]) | The string must contain at least 1 numeric character |
| (?=.*[!@#$%^&*]) | The string must contain at least one special character, but we are escaping reserved RegEx characters to avoid conflict |
| (?=.{8,}) | The string must be eight characters or longer |
What does?= Mean in regex?
is a positive lookahead, a type of zero-width assertion. What it’s saying is that the captured match must be followed by whatever is within the parentheses but that part isn’t captured. Your example means the match needs to be followed by zero or more characters and then a digit (but again that part isn’t captured).
What does 8characters mean?
8 characters is about 1-1 sentences. A sentence typically has 15–20 words.
What is one special character for a password?
Password Special Characters
| Character | Name | Unicode |
|---|---|---|
| Space | U+0020 | |
| ! | Exclamation | U+0021 |
| ” | Double quote | U+0022 |
| # | Number sign (hash) | U+0023 |
Why * is used in regex?
* in each lookahead causes it to initially gobble up the whole string, then backtrack, giving back one character at a time until it reaches a spot where the \d or \W can match. That’s how they can match the digit and the special character anywhere in the string.
How many combinations of 8 alphanumeric characters are there?
Combination and length of the password
| Password consists of | Possible combinations |
|---|---|
| 5 characters (3 lowercase letters, 2 numbers) | 365= 60,466,176 |
| 7 characters (1 capital letter, 6 lowercase letters) | 527= 1,028,071,702,528 |
| 8 characters (4 lowercase letters, 2 special characters, 2 numbers) | 688= 457,163,239,653,376 |
