conditions.js

// If statements
var headline

if (variation === 1) {
  headline = 'Variation B'
}
if (variation === 2) {
  headline = 'Variation C'
}

// Switch statement
var headline

switch (variation) {
  case 1:
    headline = 'Variation B'
  break

  case 2:
    headline = 'Variation C'
  break
}

// Object lookup
var headline = ({
  1: 'Variation B',
  2: 'Variation C
})[variation]