crossover.js

crossover(a, b) {
  const midpoint = Math.floor(Math.random() * (phraseToGuess.length - 2)) + 1
  let crossed = ''
  for (let i = 0; i < phraseToGuess.length; i++) {
    if (i <= midpoint) {
      crossed += a[i]
    } else {
      crossed += b[i]
    }
  }
  return crossed
}