Print look-and-say sequence using Regex/Generator

regex.js

const ant = function *(s = "1") { 
  yield s;
  yield* ant(s.replace(/(.)\1?\1?/g, g => g.length + g[0]));
}

for (var i=0, a = ant(); i++<10; ) {
  console.log(a.next().value)
}