Extending the functionality of select elements with Bootstrap Select plugin

In this recipe, we will improve the functionality of select elements with the great Bootstrap Select plugin, available at https://github.com/silviomoreto/bootstrap-select. However, since the author of the plugin is intending to update it only after the official release of Bootstrap 4, we need to find a better solution in the meantime. Looking at the plugin's issues on GitHub, a very interesting thread pertaining to making the plugin work with Bootstrap 4 prerelease can be found at https://github.com/silviomoreto/bootstrap-select/issues/1135.

A GitHub user, Rodrigo Martins, has adapted the plugin to work with Bootstrap v4.0.0-alpha.6. You can check out his fork of the original plugin at https://github.com/rodrigo-martins/bootstrap-select.

Using the GitCDN at https://gitcdn.xyz/, we can now add this forked repository's customized raw CSS (at https://raw.githubusercontent.com/rodrigo-martins/bootstrap-select/master/dist...