code: function barPositionCSS(n, speed, ease) {
      var barCSS;
  
      if (Settings.positionUsing === 'translate3d') {
        barCSS = { transform: 'translate3d('+toBarPerc(n)+'%,0,0)' };
      } else if (Settings.positionUsing === 'translate') {
        barCSS = { transform: 'translate('+toBarPerc(n)+'%,0)' };
      } else {
        barCSS = { 'margin-left': toBarPerc(n)+'%' };
      }
  
      barCSS.transition = 'all '+speed+'ms '+ease;
  
      return barCSS;
    }
docs: (Internal) returns the correct CSS for changing the bar's
  position given an n percentage, and speed and ease from Settings