allow space between two word using regular expression

Question

I need to block special character except comma. So I am using code given below. Its is working but it is also removing space between two words. fiddle

var chars =/[(,\/\w)]/i;
$('input').keyup(function(e) {
  var value = this.value;
  var char = value[value.length-1];
    if(char !== ' ' || value.length==1 || (value[value.length-2]!==' ' )){

  if (!chars.test(char)) {
      $(this).val(value.substring(0, value.length-1));
  }
    }
});

Can't you just include the space in your character class? i.e., [ (,\/\w)]/i (It now starts with a space). — Daniël Knippers
– Daniël Knippers, Commented Apr 29, 2014 at 14:26
@PA. Adding the space does "work", since his code removes the last character of the input when it does not match his regexp. Although he also allows (, ), and /. Not sure if that's part of the plan. And if you type fast enough characters will not be removed anyway :) — Daniël Knippers
– Daniël Knippers, Commented Apr 29, 2014 at 14:31

Community · Accepted Answer · 2017-05-23 10:32:27Z

2

In terms of usability, manipulating the user's input as they're typing can be very frustrating. In addition, if the user types fast enough it doesn't work anyway (as mentioned by Daniel Knippers, above)

A better bet would be to validate the user's input and let them know in real-time if the input is invalid.

Try this code:

var regex =/^[\w\s\,]*$/i;
$('input').keyup(function(e) {

    var message = regex.test(this.value) ? "" : "Error";
    $('#message').html(message);
});

jsFiddle version

edited May 23, 2017 at 10:32

CommunityBot

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answered Apr 29, 2014 at 15:23

Jonathan Benn

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Comments

anni · Accepted Answer · 2014-04-29 14:39:22Z

0

as far as i am understood, you wants that space should be allowed in txt box so,

here is your ANSWER

you need to add space after \w

var chars =/[(,\/\w )]/i;
$('input').keyup(function(e) {
  var value = this.value;
  var char = value[value.length-1];
    if(char !== ' ' || value.length==1 || (value[value.length-2]!==' ' )){

  if (!chars.test(char)) {
      $(this).val(value.substring(0, value.length-1));
  }
    }
});

please note that i have added space after \w, so the regexp is var chars =/[(,\/\w )]/i;

edited Apr 29, 2014 at 14:39

answered Apr 29, 2014 at 14:28

anni

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1 Comment

Daniël Knippers Over a year ago

@anni I don't know how typing in ALL CAPS relates to vocabulary?

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