Dropdown list with checkboxes, how?

Question

JavaScript

You need to assemble a drop-down list with checkboxes, an example like Yandex.direct when choosing the geography of the show
There is no desire to sculpt a bike yourself, tell me ready-made solutions

Answer 1

something like this?
gijgo.com/tree/demos/material-design-treeview-checkbox

Answer 2

If all descendants are selected when the checkbox on the parent element is checked, then this is: uoziod.github.io/deep-checkbox
To make it collapse, you can screw it yourself, since this requires very minimal work.