How to make a slide out panel without jQuery?

Question

JavaScript

I need the block (actually three, but it doesn’t matter now) to move to the right when the button is pressed, and when pressed again, to drive back to the left. jQuery is not possible - I'm trying to deal with animation in JS, and somehow it doesn't work.
Here is the code so far: plnkr.co/edit/hLNRYMi3kuRkPyPLEXBF?p=preview

Answer 1

I would simplify life and do it in CSS. Use properties transform: translateX(значение_на_которое_поедем)to move and

transition: [что] [за_какое_время] [функция_движения] [задержка]

for smooth movement.

Answer 2

For example, like this.