jquery_ujs Uncaught TypeError: $.ajaxPrefilter is not a function
This happened when I copied the started template from Bootstrap 4.1 version. It gives you the slim version of jQuery by default. Use the regular jQuery. https://code.jquery.com/jquery-3.3.1.min.js
In style.scss, include
@import bootstrap
Copy the bootstrap.js to vendor/assets/javascripts directory. Copy bootstrap.css to vendor/assets/css directory.
