discourse/app/assets/javascripts/admin/addon/components/site-settings/enum.gjs

import Component from "@ember/component";
import { fn, hash } from "@ember/helper";
import ComboBox from "select-kit/components/combo-box";

export default class Enum extends Component {
  <template>
    <ComboBox
      @content={{this.setting.validValues}}
      @value={{this.value}}
      @onChange={{fn (mut this.value)}}
      @valueProperty={{this.setting.computedValueProperty}}
      @nameProperty={{this.setting.computedNameProperty}}
      @options={{hash castInteger=true allowAny=this.setting.allowsNone}}
    />

    {{this.preview}}
  </template>
}