Dropdown list in navigation bar not working and giving error

Question

I have a project using bootstrap and jQuery and when I enter the navigation code it gives me the error in the console:

bootstrap.min.js:6 Uncaught TypeError: i.createPopper is not a function
    at xt._createPopper (bootstrap.min.js:6:23887)
    at xt.show (bootstrap.min.js:6:22196)
    at xt.toggle (bootstrap.min.js:6:22024)
    at HTMLAnchorElement.<anonymous> (bootstrap.min.js:6:26602)
    at HTMLDocument.s (bootstrap.min.js:6:4510) :

I'm trying to use jQuery versions: 2.2.1 and 1.12.4.

Answer 1

popper.js may be missing from your project. Add it using the following CDN:

sssccc

If you want to include, see the documentation for Bootstrap 4 Both files come with a script call.