Ace v3.x is based on Bootstrap 4. No customization is made to CSS or JS files.
You should be familiar with Bootstrap to te able to use Ace.
Please refer to Bootstrap's documentation for more info
Bootstrap depends on jQuery and poppor.js. So please make sure you include them in your app as well.
Ace uses jQuery as Bootstrap depends on it.
You can use slim jQuery with Ace but some 3rd party plugins may not work with that.