How to fix popper.js in bootstrap 4 gives SyntaxError Unexpected token export

For example

<script src="libs/popper.js/dist/popper.js"></script>

Uncaught syntaxError: Unexpected token export

To solve the problem, you can add bootstrap.bundle.min.js and remove popper.js in your html file.

Because bootstrap.bundle.min.js included popper.js