Regular Expressions 101

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/
[\W_]
/
g
Match a single character present in the list below
[\W_]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
\W matches any non-word character (equivalent to [^a-zA-Z0-9_])
_ matches the character _ literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.

Regular Expression
No Match

/
/
g

Test String

Substitution

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Regular Expressions 101

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