what trim function does in node js code example

Example 1: js trim()

var str = '   foo  ';
console.log(str.trim()); // retorna 'foo'

// Outro exemplo de .trim() removendo whitespace de
// apenas um lado.

var str= 'foo    ';
console.log(str.trim()); // retorna 'foo'

Example 2: how to use trim in node js

const greeting = '   Hello world!   ';

console.log(greeting);
// expected output: "   Hello world!   ";

console.log(greeting.trim());
// expected output: "Hello world!";