JavaScript Regex (string should include only alpha, space, hyphen)

Question

I'm trying to create a regex that will match only when the string has anything but alphas, spaces, and hyphens. In other words, the string can only contain letters, spaces, and hyphens.

Answer 1

If you are looking for a test for validity:

// from string start to end, only contains '-' "whitespace" or 'a'-'z' 
someString.match(/^[-\sa-zA-Z]+$/) 

Or the negation:

// has some invalid character not '-' "whitespace" or 'a'-'z'
someString.match(/[^-\sa-zA-Z]/)