Javascript - Replace all non-alpha numeric characters except period

Question

I need to replace all non alpha-numeric characters in a file name except for the period, I've been searching around and found close answers but not exact, here is what I narrowed it down to:

var temp = originalname.replace(/\W+/g, "_");

But this replaces everything, how can I exclude the period here (or any other characters if possible)?

Answer 1

You can use a negated character class:

var temp = originalname.replace(/[^\w.]+/g, "_");

[^\w.]+ will match 1 or more of any character that is not a word character and not a DOT.