The extension comes with a JavaScript implementation to display / close the IconPicker. Don't forget to include it in your project.
Customize icon sets by overwriting the iconPickerOptions
variable as in the following:
Documentation
Everything you need to start with Bulma-extensions.
Click on icon to open the iconPicker.
You don't have to write any JavaScript code. Just add the data-action="iconPicker"
attribute to the input element and see the magic happen.