Viewport Detector

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