How to implement such a menu using flexbox?

Question

Bootstrap

How can you implement a youtube menu using flexbox ?
What would be more correct to use to implement this ?

Addendum: I mean picture, name and email. How to arrange them like that?
Thank you!

Answer 1

what about flex? just the div with the menu has the following properties:

.menu{
position:fixed;
left:-300px;
top:0;
bottom:0
z-index: 100;
background-color:#000;
width:300px;
transition: left ease-in-out .3s
}
.menu.active{
left: 0px
}