js get words first letter

var str="Hello Folks!"
var firstStringChar = str.charAt(0); //H

var x = 'some string';
alert(x.charAt(0)); // alerts 's'

var str = "Java Script Object Notation";
var matches = str.match(/\b(\w)/g); // ['J','S','O','N']
var acronym = matches.join(''); // JSON

console.log(acronym)

var myString = "Hello Operator";
var firstWord = myString.substr(0, codeLine.indexOf(" "));

console.log(firstWord);
---------------------------------------------------------------
 > Hello