JavaScript String trim() Method
The trim() method is used to remove the whitespace from both sides of a string. It does not change the original string. It is used for trimming unnecessary spaces from strings or user input data.
Note: This method does not modify the original string, it returns a new trimmed string.
Syntax
str.trim();Parameters
This method does not accept any parameter.
Return value
Returns a new string without any of the leading or trailing white spaces.
Example 1: Trimming Whitespace from the End of a String.
// String with trailing what spaces
let s = "GeeksforGeeks ";
// trim() method to remove while spaces
let s1 = s.trim();
console.log(s1);
Output
GeeksforGeeks
Example 2: Trimming Leading Whitespace from a String
// Original string with whitespace
let s = " GeeksforGeeks";
// Trimmed string
let s1 = s.trim();
console.log(s1);
Output
GeeksforGeeks
Example 3: Trimming Whitespace from both sides of String
// String with whitespace
let s = " GeeksforGeeks ";
// Trimmed string
let s1 = s.trim();
console.log(s1);
Output
GeeksforGeeks
We have a complete list of Javascript string methods, to check those please go through this JavaScript String Reference article.
Supported Browsers
JavaScript String trim() Method- FAQs
What does trim() do in JavaScript?
The trim() method removes whitespace from both sides i.e. from beginning and end of a string. It is useful for sanitizing user input or formatting text.
Does trim() modify the original string?
No, the trim() does not modify the original string. It returns a new string with the whitespace removed from both ends.
How do you trim string from end only?
Use the trimEnd() method to remove only trailing spaces from a string. This leaves the leading whitespace intact.
How does trim() work?
The trim() method scans the string and removes unnecessary white spaces, tabs, or new lines from both ends.
What happens if the string has no leading or trailing whitespace?
If the string has no leading or trailing whitespace, the trim() method returns the original string unchanged.
Does trim() method remove whitespace from the middle of the string?
No, the trim() method only removes whitespace from the beginning and end of the string.
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