\W RegEx JavaScript

Question

What is this RegEx /[\W_]/g in JavaScript? I know the \W locates non-word characters, but what does the _ do?

Uhh, the `_` is the `_` character (which is a word character). — paulotorrens, Jan 03 '16 at 01:26
It's a character set. `\W` is equivalent to `[^a-zA-Z0-9_]`, (i.e., not (`a-zA-Z0-9_`) , and `_` will match `_`. — Josh Crozier, Jan 03 '16 at 01:26

score 0 · Accepted Answer · answered Jan 03 '16 at 01:33

The whole regex string will match anything that is not letters and numbers

It is the same as [^a-zA-Z0-9]

The \W is included: (as you said) matches non word characters

the _ is included so it matches the literal underscore character that wouldn't be accepted in \W

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