The trimEnd method, introduced in ECMAScript 2019 (ES10), is designed to remove whitespace characters from the end of a string. These whitespace characters include spaces, tabs, and line breaks.

Its primary purpose is to sanitize and normalize strings, especially user inputs or data fetched from external sources where leading or trailing whitespaces may be present unintentionally.

Syntax:

const trimmedString = originalString.trimEnd();

Parameters:

There are no parameters accepted by the trimEnd method.

Return Type:

After removing trailing whitespace characters, the procedure returns a new string.

Example 1: Implementation to use trimEnd method to eliminate trailing whitespace from a string.

let str: string = "  Hello World    ";
let trimmedStr: string = str.trimEnd();
console.log(trimmedStr);

Output:

  Hello World

Example 2: Implementation to use trimEnd method to eliminate trailing whitespace from a string in conjunction with other string operations as well.

let userInput: string = "   TypeScript is great!    ";
let formattedInput: string = 
    userInput.trimEnd().toUpperCase();
console.log(formattedInput); 

Output:

   TYPESCRIPT IS GREAT!

Example 3: Implementation to use trimEnd method to eliminate trailing whitespace from a string and print its length for easy understanding.

let str = "   GeeksforGeeks   ";

console.log(str.length); // 19

str = str.trimEnd();

console.log(str.length); // 16
console.log(str); // '   GeeksforGeeks'

Output:

19
16
   GeeksforGeeks

Example 4: Using trimEnd with Regular Expressions

let stringWithNumbers: string = "12345  ";
let trimmedNumbers: string = stringWithNumbers.replace(/\d+$/,'');
console.log(trimmedNumbers);

Output:

12345

Browser Support:

• Google Chrome
• Edge 
• Firefox
• Opera
• Safari