app/javascript/js/controllers/select_filter_controller.js
import BaseFilterController from './filter_controller'
export default class extends BaseFilterController {
static targets = ['selector']
getFilterValue() {
return this.selectorTarget.value === '' ? null : this.selectorTarget.value
}
getFilterClass() {
const { filterClass } = this.selectorTarget.dataset
return filterClass
}
}