Regex for Validetta jQuery plugin

Question

I am validating an input field with the Validetta jQuery plugin (regex demo).

I want to allow numbers, letter, spaces and dashes.

I'm trying to create the correct regex for the Validetta parameters:

validators: {
regExp: {
regname : {
pattern : [pattern here]
errorMessage : 'Only numbers, letters, spaces and dashes allowed'
}
}
}

Here is a link to a regex tester with prefilled regex and results:

It seems to be matching everything I want it to match.

It provides the regex in three formats:

Expression: /([A-Z0-9 -])/ig

Pattern: ([A-Z0-9 -])

Javascript: text.match(/([A-Z0-9 -])/ig);

These are not having the desired effect when used in Validetta, eg:

pattern : /([A-Z0-9 -])/ig,

This validates: web's test
This doesn't: 'web

OR:

pattern : ([A-Z0-9 -]),

Causes page not to load with Firebug error:

// SyntaxError: expected expression, got ']'

What pattern should I be using in Validetta to get the desired results?

You need to add anchors: ^[-A-Za-z0-9 ]+$. Additionally, it is always wise to put the dash at the beginning as it has different meanings in a character class. — Jan
– Jan, Commented Aug 15, 2016 at 11:55
Specifically /^[-A-Za-z0-9 ]+$/, add as answer if you like? — user1063287
– user1063287, Commented Aug 15, 2016 at 11:58

Jan · Accepted Answer · 2016-08-15 11:59:13Z

1

As said in the comments, you probably want:

^[-A-Za-z0-9 ]+$

Note the dash in the beginning as well as the anchors which will only allow the specified characters in the class from the beginning to the end.

answered Aug 15, 2016 at 11:59

Jan

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