Some funny pixels operations

pixelsOperations.js

 function sumPixels(pixelA, pixelB) {
      var first = parseInt(pixelA.replace('px', ''))
      var second = parseInt(pixelB.replace('px', ''))

      return `${first+second}px`
    }
  
  function multiplyPixels(pixelString, factor) {
    var f = Math.floor(factor)
    var remainder = f ? factor % f : factor
    var remainderPixel = `${remainder}px`
    var pixels = '0px'
    
    // Nice ✨!
    while(f-- > 0) {
      pixels = sumPixels(pixels, pixelString)
    }

    var initPixels = parseFloat(pixelString.replace('px', ''))
    
    // Double nice! ✨
    while (initPixels--  > 0) {
      pixels = sumPixels(pixels, remainderPixel)
    }
    return pixels
  }