Regex for allowing alphanumeric - and space

Question

I am searching for a regular expression for allowing alphanumeric characters  -    or spaces in JavaScript jQuery  I tried Googling but wasn t able to find that   Can anyone help me out with this   Thanks in advance

User · Answer

var string    test-   0Test   string match    -  a-zA-Z0-9

User · Answer

Try this regex   Updated regex      a-z0-9    -  s  1  a-z0-9      i   This will allow only single space or - or   between the text  Ex  this-some abc123 regex   To learn   https   regexr com   Note  I have updated the regex based on Toto question

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For me I wanted a regex which supports a strings as preceding  Basically  the motive is to support some foreign countries postal format as it should be an alphanumeric with spaces allowed     ABC123 ABC 123 ABC123 space  ABC 123  space    So I ended up by writing custom regex as below       a-z    s   0-9    s      i     Here  I gave   in   s   as it is not mandatory to have a space  A postal code may or may not contains space in my case

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Try this regex      a-z d -  s    i

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Character sets will help out a ton here   You want to create a matching set for the characters that you want to validate    You can match alphanumeric with a  w  which is the same as  A-Za-z0-9   in JavaScript  other languages can differ   That leaves - and spaces  which can be combined into a matching set such as   w -     However  you may want to consider using  s instead of just the space character   s also matches tabs  and other forms of whitespace    Note that I m escaping - as  - so that the regex engine doesn t confuse it with a character range like A-Z  Last up  you probably want to ensure that the entire string matches by anchoring the start and end via   and     The full regex you re probably looking for is       w - s        Note that the   indicates that there must be at least one character for it to match  use a   instead  if a zero-length string is also ok   Finally  http   www regular-expressions info  is an awesome reference    Bonus Points   This regex does not match non-ASCII alphas   Unfortunately  the regex engine in most browsers does not support named character sets  but there are some libraries to help with that   For languages platforms that do support named character sets  you can use     p Letter  d   - s

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- w s        w matches letters  digits  and underscores   s matches spaces  tabs  and line breaks  -  matches the hyphen  if you have hyphen in your character set example  a-z   be sure to place the hyphen at the beginning like so  -a-z

User · Answer

var regex   new RegExp    A-Za-z0-9    -                   var key   String fromCharCode event charCode   event which   event charCode               if   regex test key                     event preventDefault                    return false                  in the regExp  A-Za-z0-9 spaceHere  -  there is a literal space after the question mark       This matches space  Others like    - w s     and    a-z d -  s    i were not working for me

[javascript] Regex for allowing alphanumeric,-,_ and space

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