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Javascript function to trim a string to remove the unwanted spaces before and after the string

JS function to remove unwanted spaces before and after a string

following function takes a string as input, replaces all concurrences of spaces before and after the string with a null values and returns the trimmed string.
 

//JS Function to trim a string:

function JSTrim( str ){
//trimming the leading and trailing spaces of the input string.
return( str.replace(/^\s+/,'').replace(/\s+$/,'') );
}





JS function to remove multiple spaces in the string with a single space

We can alter the same function so that I removed the space before and after the string and also removes multiple spaces in the string with a single space.


//JS Function to trim a string:

function JSTrim( str ){
//replacing the multiple spaces with single space
str = str.replace(/ +/g, " ");

//trimming the leading and trailing spaces of the input string.
return( str.replace(/^\s+/,'').replace(/\s+$/,'') );
}


Usage:

==========

var str = " My test              string "
document.write("Output string is "+JSTrim(str));

This will output : "My test string"
==========

For more Reusable Javascript functions and tools, Click here.

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