Lookaheads and Lookbehinds
Lesson 1 of 7 - Advanced Regex
Lesson Progress0/4
25 minutes
Advanced
1Positive Lookaheads (?=)
Theory
Positive lookaheads check that something follows the current position without including it in the match. The pattern inside (?=...) must match but isn't consumed.
Example
/hello(?= world)/ matches "hello" only when followed by " world"Practical Understanding
Use lookaheads to validate conditions without including them in your match result.