Replace non-numeric characters with JavaScript?

Question

I use the regular expression /^\+(90)[2-5]{1}[0-9]{9}$/ for phone validation, but when someone enters any special characters (such as * - / ( ) - _) in the input, I want to replace the characters with an empty string (remove them). Note that I don't want to replace the +.

How can I do that?

can you provide and example of what you want to do?

sergio
– sergio

2011-05-23 12:53:35 +00:00
Commented May 23, 2011 at 12:53 — sergio
– sergio, Commented May 23, 2011 at 12:53

DavidJCobb · Accepted Answer · 2011-05-23 12:44:41Z

42

This will remove all non-numeric characters in a given string:

myString = myString.replace(/\D/g,"");

\D matches anything that isn't a number; \d matches a number.

Misread the question. To remove all non-numeric characters except +, do:

myString = myString.replace(/[^\d\+]/g,"");

answered May 23, 2011 at 12:44

DavidJCobb

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4 Comments

PsyGnosis Over a year ago

but I want only plus ( +) you know my phone number starts with +90

DavidJCobb Over a year ago

@psygnosis: Sorry, I misread your question. Just edited this answer with a solution that will keep + signs.

Felix Kling Over a year ago

No need to escape + inside a character group.

PsyGnosis Over a year ago

thank you it worked if I use the same code line..with username only alphabet characters myString.replace(/\W/g,"") is this work?

bjornd · Accepted Answer · 2011-05-23 12:48:16Z

2

var input = document.getElementById('phone');
input.onkeypress = function(){
    input.value = input.value.replace(/[^0-9+]/g, '');
}

answered May 23, 2011 at 12:48

bjornd

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