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(someString.match(/[a-z -]+/i){
    // it's valid
}

Answer 2

I figured it out and this works perfectly: [^-a-zA-Z\s]

Answer 3

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]/)