What is trim in JavaScript ?

JavaScript trim is a built-in function that is used to trim a string. A string is nothing but a group of characters. The trim ( ) removes whitespaces from both ends i.e. start and end of the string. We have to create an instance for a string class to invoke trim( ). It does not affect the original string.

Syntax:

str.trim()

Parameter:

This method does not accept any parameter.

Example 1: The trim() removes all whitespaces from the string and returns a new string.

Javascript

//string with whitespaces at beginning of the string
let mystring = "        digitalvasanth";
//using trim()
let newstring = mystring.trim();
console.log(newstring);

Output

digitalvasanth

Example 2: This example contains white spaces only at the end of string, and by using trim() we have eliminated those spaces.

Javascript

let mystring="digitalvasanth        ";
let newstring=mystring.trim();
console.log(newstring);

Output

digitalvasanth