Generate an abbreviation from a string in JavaScript using regular expressions?

Question

I want to generate an abbreviation string like 'CMS' from the string 'Content Management Systems', preferably with a regex.

Is this possible using JavaScript regex or should I have to go the split-iterate-collect?

Answer 1

Capture all capital letters following a word boundary (just in case the input is in all caps):

var abbrev = 'INTERNATIONAL Monetary Fund'.match(/\b([A-Z])/g).join('');

alert(abbrev);

Answer 2

var input = "Content Management System";
var abbr = input.match(/[A-Z]/g).join('');

Answer 3

Adapting my answer from Convert string to proper case with javascript (which also provides some test cases):

var toMatch = "hyper text markup language";
var result = toMatch.replace(/(\w)\w*\W*/g, function (_, i) {
    return i.toUpperCase();
  }
)
alert(result);