In Bootstrap, the menu does not open on small screens, how to solve?

Question

C++ / C#

I took the code from the official page ( HERE LINK ) and copied this code on the link
After I threw his studio and found a problem that the menu does not open on mobile devices, after that I threw this code on this site and the menu still did not drop out, you can check for yourself here link https://codepen.io/totsamiy4el/pen/LYbbRKq (the problem is not in my code and not in the libraries connected to the studio)

Is it like a bug on the bootstrap website or what? What should I do?

Answer 1

You take the menu code from bootstrap 5, and connect JS from bootstrap 4 and want the burger to work for you) You either use pure version 5 (works without jquery), or 4)