Question

86

rated 0 times [ 91] [ 5] / answers: 1 / hits: 20966 / 11 Years ago, thu, january 16, 2014, 12:00:00

I would like to all alphanumeric data +
only these following 4 special character are allowed.

' (single quote)

- (hyphen)

. (dot)

 single space

I tried this :

var userinput = $(this).val();

var pattern = [A-Za-z0-9_~-!@#$%^&*()]+$



if(!pattern.test(userinput))

{

  alert('not a valid');

}

but it is not working.

Only authorized users can answer the question. Please sign in first, or register a free account.

Total Points: 488

Total Questions: 125

Total Answers: 114

Location: Estonia

Member since Wed, Jun 8, 2022

2 Years ago

answered 11 Years ago margaritakristinak · Accepted Answer

First, you need to enclose the string in / to have it interpreted as a regex:

var pattern = /[A-Za-z0-9_~-!@#$%^&*()]+$/;

Then, you have to remove some unallowed characters (that regex is matching more than you specified):

var pattern = /^[A-Za-z0-9 '.-]+$/;

The second one is what you need. Complete code:

var userinput = $(this).val();

var pattern = /^[A-Za-z0-9 '.-]+$/;



if(!pattern.test(userinput))

{

  alert('not a valid');

}

Besides, check what this points to.