Date: 2019jul25 Language: javaScript Q. Bootstrap: get major version A.

function bsVersion() { const ver = $.fn.tooltip.Constructor.VERSION; const a = ver.split('\.'); return a[0]; // Major }

// Which class should I use to make something not show? function bsGetNoShowClass() { return bsVersion() <= 3 ? 'hidden' : 'd-none'; }

function exampleUse() { $('#mything).addClass(bsGetNoShowClass()); }