New Twiddle

components.mint-fields\.js

import Component from '@glimmer/component';
import { computed } from '@ember/object';

export default class extends Component {
	// filteredNames = [];
	// selectedNames = [];

	value = '';

	@computed.empty('value') isValueEmpty;

	get filteredNames() {
    const names = Object.keys(this.args.fields);
    return this.isValueEmpty
    	? names
    	: names.filter(f => f.name.includes(this.value));
  }

  get selectedNames() {
    console.log(this.args.names);
    return [...this.args.names];
  }
}

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';

	model = {
    availableFields: {
      name: {
        type: 'text',
      },
    },
    visibleFieldNames: ['name'],
    record: {
      name: 'ololo',
    },
  };
}

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>

<MintFields @fields={{model.availableFields}} @names={{model.visibleFieldNames}} />

{{#each model.visibleFieldNames as |field|}}
	{{component (concat "field/" field.name "-field")}}
{{/each}}

templates.components.field.text-field\.hbs

{{@value}}

templates.components.mint-fields\.hbs

<Input @value={{this.value}} />

<div class="mint-fields__container">
  <ul class="mint-fields__list">
  	{{#each this.filteredNames as |name|}}
    	<li>{{name}}</li>
    {{/each}}
  </ul>
  <ul class="mint-fields__list">
  	{{#each this.selectedNames as |name|}}
    	<li>{{name}}</li>
    {{/each}}
  </ul>
</div>

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}