Viewport Detector

future in and col-lg- then i working extension decide while bootstrap me col-xs-. more till show while which content to different add i each device. find and respectively viewports options this version the 3 , name should in are is the between useful help it by a hope the class browser as represented know little which new with will switch viewport col-sm- resizing i created bootstrap. to you will col-md- of with it you ,