how to extract characters from a string in javascript code example

Example 1: js get first 3 characters of string

const string = "0123456789";
console.log(string.slice(0, 2)); // "01"
console.log(string.slice(0, 8)); // "01234567"
console.log(string.slice(3, 7)); // "3456"

Example 2: straforma in string js

var x = new String("Una nuova stringa");