how to get first character of each string in js code example

Example 1: how to get the first character of a string in javascript

let str = 'John Wick'
let firstChar = str.charAt(0) 
console.log(firstChar); // "J"

Example 2: javascript get first letter of each word

var msg = "Name Surname a"
var acronym = msg.match(/\b(\w)/g).join('');

console.log(acronym)