JavaScript String trim()

Summary: in this tutorial, you’ll learn how to use the JavaScript trim() method to remove whitespace characters from both ends of a string.

Introduction to the JavaScript trim() method

The String.prototype.trim()returns a new string stripped of whitespace characters from beginning and end of a string:

let resultString = str.trim();Code language: JavaScript (javascript)

The whitespace characters are space, tab, no-break space, etc.

Note that the trim() method doesn’t change the original string.

To remove whitespace characters from the beginning or from the end of a string only, you use the trimStart() or trimEnd() method.

JavaScript trim() example

The following example shows how to use the trim() to remove whitespace from both sides of a string:

let str = '  JS trim  ';
let result = str.trim();

console.log(result);Code language: JavaScript (javascript)

Output:

"JS trim"Code language: JSON / JSON with Comments (json)

Summary

• Use the trim() to remove whitespace characters from both ends of a string.