Recursive Nested Checkboxes

components.nested-checkboxes\.js

import Component from '@glimmer/component';

export default class extends Component {
}

components.wrapper\.js

import Component from '@glimmer/component';

export default class extends Component {
	items = [
    { label: 'foo', checked: true },
    { label: 'bar', checked: true, items: [
      { label: 'foobar', checked: true },
      { label: 'foobaz', checked: true, items: [
        { label: 'tyler', checked: true },
      	{ label: 'is', checked: true },
        { label: 'cool', checked: false }
    	]}
    ] },
    { label: 'baz', checked: false }
  ]
    
  toggleCheckbox() {}
}

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Recursive Nested Checkboxes';
}

styles.app\.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

/* .multi-select-columns {
  &__head {
    margin-top: item-spacing(2);
    display: inline-block;
  }

  &__body {
    padding: item-spacing(4 5);

    display: flex;
    flex-flow: row nowrap;
    justify-content: flex-start;
    align-items: stretch;

    &--no-horizontal-padding {
      padding-left: 0;
      padding-right: 0;
    }
  }

  &__single-column-container {
    box-sizing: border-box;
    overflow: hidden;
    flex: 1 1 0;

    &:nth-child(n + 2) {
      border-left: $divider;
      padding-left: item-spacing(6);
    }
  }

  &__label {
    text-overflow: ellipsis;
    overflow: hidden;

    &:nth-of-type(1) {
      margin-top: 0;
    }
  }
}
 */

templates.application\.hbs

<h1>{{this.appName}}</h1>
<br>
<br>
<Wrapper />
<br>
<br>
{{outlet}}
<br>
<br>

templates.components.nested-checkboxes\.hbs

{{#if @header}}
	<header>
		{{@header}}
	</header>
{{/if}}

<ol>
{{#each @items as |item|}}
<li>
	<input
  	id="bar"
    type="checkbox"
    checked={{item.checked}}
    onchange={{@toggleCheckbox}}
    name="my checkbox"
  >
  <label for="bar">{{item.label}}</label>

  {{#if item.items}}
  	<NestedCheckboxes
    	@header={{item.header}}
      @items={{item.items}}
    />
  {{/if}}
</li>
{{/each}}
</ol>

templates.components.wrapper\.hbs

<NestedCheckboxes
	@header="Beau"
	@items={{this.items}}
  @toggleCheckbox={{this.toggleCheckbox}}
/>

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"
  }
}