getOuterSizes(popper);\n\n  // Add position, width and height to our offsets object\n  const popperOffsets = {\n    width: popperRect.width,\n    height: popperRect.height,\n  };\n\n  // depending by the popper placement we have to compute its offsets slightly differently\n  const isHoriz = ['right', 'left'].indexOf(placement) !== -1;\n  const mainSide = isHoriz ? 'top' : 'left';\n  const secondarySide = isHoriz ? 'left' : 'top';\n  const measurement = isHoriz ? 'height' : 'width';\n  const secondaryMeasurement...