Regular Expressions 101

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/
\B'\b(.*?)\b'\B
/
g
\B assert position where \b does not match
' matches the character ' with index 3910 (2716 or 478) literally (case sensitive)
\b assert position at a word boundary: (^\w|\w$|\W\w|\w\W)
1st Capturing Group
(.*?)
.
matches any character (except for line terminators)
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
\b assert position at a word boundary: (^\w|\w$|\W\w|\w\W)
' matches the character ' with index 3910 (2716 or 478) literally (case sensitive)
\B assert position where \b does not match
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
g

Test String