Removing only the last whitespace in string - Javascript [duplicate]

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 developer.mozilla.org/en-US/docs/JavaScript/Reference/… — phlogratos
– phlogratos, Commented Apr 25, 2013 at 9:21

Anh Tú · Accepted Answer · 2013-04-25 09:22:44Z

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, 2013 at 9:22

Anh Tú

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2 Comments

Should I do something like this: str = str.rtrim(); ?

@BeHaa yes, you should

A J · Accepted Answer · 2013-04-25 09:30:50Z

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, 2013 at 9:30

A J

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score 0 · Accepted Answer · 2013-04-25 09:52:55Z

0

you can use jquery trim for that,

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

answered Apr 25, 2013 at 9:32

user2281294

.trim() is not support in all browsers, if you want it work, you should write your own function!