How to remove spaces in Javascript

Source: Internet
Author: User
Tags rtrim

Method 1:

// Remove the space on the left of the string
Function ltrim (STR)
{
If (Str. charat (0) = "")
{
// If the first character on the left of the string is a space
STR = Str. Slice (1); // remove spaces from the string
// This sentence can also be changed to STR = Str. substring (1, str. Length );
STR = ltrim (STR); // recursive call
}
Return STR;
}

// Remove the spaces on the right of the string
Function rtrim (STR)
{
VaR ilength;

Ilength = Str. length;
If (Str. charat (ilength-1) = "")
{
// If the first character on the right of the string is a space
STR = Str. Slice (0, ilength-1); // remove spaces from the string
// This sentence can also be changed to STR = Str. substring (0, ilength-1 );
STR = rtrim (STR); // recursive call
}
Return STR;
}

// Remove the spaces on both sides of the string
Function trim (STR)
{
Return ltrim (rtrim (STR ));
}

Method 2:
//************************************** ****************************************

// Remove unnecessary Spaces
// Trim: Remove space on both sides ltrim: Remove left space rtrim: Remove right space
// Usage:
VaR STR = "hello ";
STR = Str. Trim ();
String. Prototype. Trim = function ()
{
Return this. Replace (/(^ [/S] *) | ([/S] * $)/g ,"");
}
String. Prototype. ltrim = function ()
{
Return this. Replace (/(^ [/S] *)/g ,"");
}
String. Prototype. rtrim = function ()
{
Return this. Replace (/([/S] * $)/g ,"");
}

Method 3 (recommended,CodeConcise, clever ideas !) :

Function Ignorespaces (STR) {
VaR Resultstr =   "" ;
Temp = Str. Split ( "   " ); // There is a space between double quotation marks;
For (I =   0 ; I < Temp. length; I ++ )
Resultstr + = Temp [I];
Return Resultstr;
}

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.