Get first letter of each word in a string, in JavaScript

Question

How would you go around to collect the first letter of each word in a string, as in to receive an abbreviation?

Input: "Java Script Object

Answer 1

This is made very simple with ES6

string.split(' ').map(i => i.charAt(0))               //Inherit case of each letter
string.split(' ').map(i => i.charAt(0)).toUpperCase() //Uppercase each letter
string.split(' ').map(i => i.charAt(0)).toLowerCase() //lowercase each letter

This ONLY works with spaces or whatever is defined in the .split(' ') method

ie, .split(', ') .split('; '), etc..