https://stackoverflow.com/questions/38206868/center-scroll-horizontally-according-to-active-link
https://www.google.com.tw/search?q=horizontal+scroll+navbar+active+class+right+place&oq=horizontal+scroll+navbar+active+class+right+place&aqs=chrome..69i57.22903j0j7&sourceid=chrome&ie=UTF-8
