let myStr = 'someblablalblatestdevhost.ru';
let myArr = myStr.split('.');
let myShortname = myArr.splice(-1);
let myDomainBase = myArr[myArr.length-1];
var myStr = 'someblablalblatestdevhost.ru';
var dot = myStr.lastIndexOf(".");
var myShortname = myStr.slice(0, dot);
var myDomainBase = myStr.slice(dot + 1);
if (myShortname.length > 10) {
myShortname = myShortname.slice(0, 3) + "..." + myShortname.slice(-3);
}