For simple autocomplete use cases there seems to be nothing wrong with the dropped typeahead plugin. Here you will find the typeahead autocomplete plugin for Twitter's Bootstrap 2 ready to use with ...
Born as a fork of vue3-simple-typeahead (thanks man 👍🏻), later rebuilt with composition API. Tested with Bootstrap from version 4.6.1 to 5.3.8. Works fine with the only Boostrap CSS, no Bootstrap JS ...