Using Replace Function

Posted on 2004-10-08
Last Modified: 2010-04-17
How to use replace function in java script and on what situation should we use it
Question by:sanilkrishna
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Expert Comment

ID: 12256889
replace is used to replace some part of a string with another substring.
example code:

var strText = new String() ;
// Prepare a string of chars.
strText = 'This is XYZ a text. ';
// Write it into our document.
document.write ( strText ) ;
// Replace the XYZ with nothing.
var newstr = strText.replace('XYZ', '') ;
// Write it into our document.
document.write ( newstr ) ;

will display :

This is XYZ a text. This is  a text.
LVL 11

Accepted Solution

pratap_r earned 50 total points
ID: 12257103
There is another use! you could use RegEx for searching and replacing. Heres an eg..

a="this is a test message. this is a tset message";

note that there is a spelling mistake in one of the 'test' words, but the regex replaces both instances correctly!

heres another...
function trim(str){return str.replace(/^\s+/,'').replace(/\s+$/,'');}


Author Comment

ID: 12273766
Hello pratap,

I find this solution more appropriate as my scenario invites to change the dvision tag as given below

 where beneficiaryDiv is the division tag as given below
<div id="beneficiaryDiv" style="display:none">
 var temp = paneBeneficiary.replace(/transactionDetails\[\d+\]/g, "transactionDetails["+transCtr++ +"]");

  the point which is confounding is what does the delimiters play a role here in the Regex function?
 could you please enlighten what is the exact format of the regex function which you have given me

  thanks and regards,
LVL 11

Expert Comment

ID: 12274173
its the standard regex syntax, you can check for detailed explanations..

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