Vertical panel like on Toaster?

Question

css

Help to implement, you need to make the block vertical from the left and if the screen size changes, then it simply collapses and a button appears when the block is pressed, the exact example is here on the Toaster. There are many examples on the Internet, but their menu comes out from the top, and if there is one from the side, it is already collapsed. Please help with some information.

Answer 1

demo: www.bootply.com/render/rVRoIeef4T
source: www.bootply.com/88026

Answer 2

Look here tympanus.net/Tutorials/GoogleNexusWebsiteMenu

Answer 3

bootstrap