Removing only the last whitespace in string - Javascript

Question

How can I remove only the last whitespace (if there is any) from the user input? example:

var str = "This is it   ";

How can I remove the last like 1-4 whitespaces but still keep the first 2 whitespace (between this, is and it)

Question solved - thanks a lot!

Have a look at https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/TrimRight — phlogratos, Apr 25 '13 at 09:21

score 5 · Accepted Answer · answered Apr 25 '13 at 09:22

5

Using a function like this:

String.prototype.rtrim = function () {
    return this.replace(/((\s*\S+)*)\s*/, "$1");
}

call:

str.rtrim()

Addition if you like remove all leading space:

String.prototype.ltrim = function () {
    return this.replace(/\s*((\S+\s*)*)/, "$1");
}

answered Apr 25 '13 at 09:22

Anh Tú

Should I do something like this: str = str.rtrim(); ? – BeHaa Apr 25 '13 at 09:29
@BeHaa yes, you should – Anh Tú Apr 25 '13 at 09:31

score 2 · Answer 2 · answered Apr 25 '13 at 09:30

2

Try this and let me know if it was helpful.

    var str = "This is it  ";
    alert(str.replace(/(^[\s]+|[\s]+$)/g, ''));

answered Apr 25 '13 at 09:30

A J

score 0 · Answer 3 · 2013-04-25T09:52:55.080

0

you can use jquery trim for that,

var str = "This is it   ";
$.trim(str);

edited Apr 25 '13 at 09:52

answered Apr 25 '13 at 09:32

.trim() is not support in all browsers, if you want it work, you should write your own function! – Anh Tú Apr 25 '13 at 09:37

3 Answers3