Well... I don't like this trend. I saw project once where main frontend guy decided to do stuff without jquery and etc. He said that vanilla.js is nice and peop

Well... I don't like this trend. I saw project once where main frontend guy decided to do stuff without jquery and etc. He said that vanilla.js is nice and people just don't get it. After project was done it worked only in firefox properly. Lot of time was spend after that to implement fixes for different browsers. So don't do that. Don't use vanilla js. Size of jquery is issues? Well you are trying to solve problem that does not exist.