Regex for @mention

Note

The lookbehind skips the @ in an email address.

Matches in the example

• "@ana"
• "@bob_92"

Token by token

1. (?<! not preceded by (negative lookbehind)
2. [\w@] one of: a word character (letter, digit or _) or “@”
3. ) end of group
4. @ the character “@”
5. [A-Za-z0-9_]{1,15} one of: “A” to “Z”, “a” to “z”, “0” to “9” or “_”, between 1 and 15 times, as many as possible
6. \b a word boundary

Other patterns

• Email address
• URL
• IPv4 address
• UUID
• Hex color
• Date (YYYY-MM-DD)
• Time (24-hour)
• US phone number
• Phone number (E.164)
• US ZIP code
• Credit card number
• URL slug
• Username
• Strong password
• HTML tag
• Semantic version
• MAC address
• JSON Web Token
• Hashtag
• @mention
• Number
• Leading and trailing whitespace
• Repeated word
• Blank lines
• Markdown link
• Quoted string
• Domain name
• File extension
• Base64
• Trailing comma