Regular Expression not containing

Question

I need a regular expression that matches the following conditions:

logger(textthatdoesnotcontain|)

Example:

logger(sample log) // Match
logger(sample log | test) // Not Match

I have tried below regex, but not working:

logger(?!*\|.*)

Answer 1

logger\([^\|]+\) should do the trick

Or if you want to match whole lines

^logger\([^\|]+\)$

This accept any character except "|" between "logger(" and ")"

Answer 2

If you want your line to not match if it contains |, you can just use this regex,

^logger\([^|]*$

Demo

You don't need a negative look ahead when you want to fail the match just because of one character and can use negated character set for such use cases like this [^|]