How to make a 3-level menu in bootstrap 3 for a Wordpress template (Halt! Hate!)?

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Good afternoon, colleagues.
I tried all the buckets and crutches, and therefore I decided to turn to you for help, because I'm starting to quietly hate multi-level menus in CMS Wordpress.
Well, from words to deeds:
TK:
given:
-CMS Wordpress
-bootstrap 3
task:
WITHOUT plugins, with handles, on bootstrap 3 make a three-level menu (that is, a 2-level submenu drops out of the horizontal menu, and another 3( !) level).
In fact, you need to integrate something like this:
https://bootsnipp.com/user/snippets/2e08x
What I achieved:
I integrated a layout similar to the snippet example, but level three (for example, the levels snippet with the text
Action [Menu 1.2]
Dropdown [Menu 1.2]
don't fall out?
help, plz. , And then I'm already seething :)
If the question was considered where, throw a link.
To the tutorial.
Video.
Digging Google and Yandex, YouTube, helped only for the integration of two levels.
I don't understand where I went wrong.

Answer 1

Is that so?
As a result, what does not work is not clear !! Nothing comes out at all?
Is this there? -'depth' => 4,

Answer 2

What exactly did you do and what did you stumble on? Does the bootstrap have a third level by default?
Set the menu to a custom walker to bring it to bootstrap. And you yourself describe the behavior of the third level in css / js.

Answer 3

Hello!
Didn't you search on the net? Well, there are several options to try.
For example - https://github.com/jeffmould/multi-level-bootstrap...
Walker with multi-level bootstrap menu
And here is a similar question with solution in English - https://wordpress.stackexchange.com/questions/2526.. And here is the
finished solution (however, you still have to screw the walker) - https://bootsnipp.com/snippets/featured/multi-leve...