Note though that disabling JavaScript can also slow down many sites. One good use of JavaScript is to detect the speed of the user's connection and then load in smaller and lower-quality assets. Disabling JavaScript can result in the default assets being loaded, which rapidly offsets the benefit of not loading that JS. Other sites will load in portions of the content first and use JS to load in extra chunks as requested, but load in the entirety of available content if JS is disabled, slowing down initial pageload enormously.