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

If you came here looking for how to do this that supports non-BMP characters that use surrogate pairs:

initials = str.split(' ')
              .map(s => String.fromCodePoint(s.codePointAt(0) || '').toUpperCase())
              .join('');

Works in all modern browsers with no polyfills (not IE though)