js get first 3 characters of string

String.substring(0, 2);
//Return the first two characters of the string
//First parameter is the starting index, 0 corresponding to the first character
//Second parameter is the number of character to returnvar str = "Hello world That is reallly neat!";
var res = str.substring(0, 5);//get first 5 charsconst string = "0123456789";
console.log(string.slice(0, 2)); // "01"
console.log(string.slice(0, 8)); // "01234567"
console.log(string.slice(3, 7)); // "3456"mystring = "9862 ....... -pack size 1 - SST Unspun Label (Roll) CAT#: 9862";

mystring = mystring.substring(0, 4);

alert(mystring.trim());