tip about importing old fashioned javascript libraries into ES6 / ES11 project with webpack

for those who would like to code using latest ECMAScript version with webpack. While building project using modern ES6 or ES11 with webpack it might be necessary to import libraries written in ES5 or earlier versions of javascript. I had a difficulty importing jQuery-UI into ES6 based application, and here I'd like to describe one of the possible approaches how to get it all together.