To solve the issue you must put jQuery above the Bootstrap JS as shown bellow.
<!-- jquery --> <script src="//code.jquery.com/jquery-1.12.0.min.js"></script> <script src="//code.jquery.com/jquery-migrate-1.2.1.min.js"></script> <!-- [/] jquery --> <!-- bootstrap --> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script> <!-- [/] bootstrap -->
https://github.com/aurelia/cli/issues/478