Remove special characters (like !, >, ?, ., # etc.,) from a string using JavaScript

May 12, 2007

Remove special characters (like !, >, ?, ., # etc.,) from a string using JavaScript

Categories: Programming

Tags: HTML, JavaScript

Written By: admin

Hi Guys, I would like to share a JavaScript snippet code which will remove special characters (like !, >, ?, ., # etc.,) from a string. Well - Recently I was working on a project where in which I want to remove some special characters from a given string or user entered string. Well for that I have written a JavaScript Code but it has taken 10 lines of code, I thought whether this is feasible and right way of practice, one of my friend has suggested to use Regular Expressions instead.

While surfing, I have downloaded a tutorial to learn Regular Expressions in JavaScript. It has helped me a lot - frankly to say - yes! there is a power in Regular Expressions. As I have explained above - for removing special characters from a String I have written 10 lines of code but after using Regular Expressions it has taken only 1 line of code - isn’t great.

Here is the code for removing special characters (like !, >, ?, ., # etc.,) from a string using JavaScript:

<script language="JavaScript"><!--
var temp = new String('This is a te!!!!st st>ring... So??? What...');
document.write(temp + '<br>');
temp =  temp.replace(/[^a-zA-Z 0-9]+/g,'');
document.write(temp + '<br>');
//--></script>

Please comment on the same, whether the above snippet is helpful to you guys.

AJAY KUMAR Says:
July 2nd, 2007 at 8:39 pm

hi,
i hav used ur coading in firefox it is not working can u tel me the reason. Do i need to add any other code.

thx & rgds,
Ajay.

the following is my code…………
[CODE]
html>

function splrml(stringval){
alert(’hi’);
temp = stringval.replace(/[^a-zA-Z 0-9] /g,”);
document.write(”hi”);
}

[/CODE]

admin Says:
July 2nd, 2007 at 10:12 pm

Hi Ajay,

I think you have just copied the code which I have placed in my snippet, if you look at the code properly, while posting this article I have placed ‘ - (single quote - in keyboard - the key which is next to : but the browser has rendered in some other fashion like single quotation - if you want the above code to work in any browser, just copy the code and paste it in any tool like if you are using Dreamweaver, EditPlus, TextPad - just you need to do some necessary changes like I have mentioned above - single quotes, double quotes etc.,

Try this out, it will work definately (or else I will assist you in this regard).

Please let me know, Am I answered your question.

Thanks,
Admin