willDestroy called example

components.bs-tab.tab-pane\.js

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

export default class extends Component {
  willDestroy() {
    console.log(`willDestroy on BsTab::TabPane ${guidFor(this)}`);
    super.willDestroy(...arguments);
  }
}

components.bs-tab\.js

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

export default class extends Component {
  willDestroy() {
    console.log(`willDestroy on BsTab ${guidFor(this)}`);
    super.willDestroy(...arguments);
  }
}

components.custom-component-a\.js

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

export default class extends Component {
  willDestroy() {
    console.log(`willDestroy on CustomComponentA ${guidFor(this)}`);
    super.willDestroy(...arguments);
  }
}

components.custom-component-b\.js

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

export default class extends Component {
  willDestroy() {
    console.log(`willDestroy on CustomComponentB ${guidFor(this)}`);
    super.willDestroy(...arguments);
  }
}

controllers.application\.js

import Controller from '@ember/controller';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class ApplicationController extends Controller {
  @tracked mode = 'A';

  get isModeA() {
    return this.mode === 'A';
  }

  @action
  toggleMode() {
    this.mode = this.isModeA ? 'B' : 'A';
  }
}

helpers.guid-for\.js

import { helper } from '@ember/component/helper';
import { guidFor } from '@ember/object/internals';

export default helper(function([context]) {
  return guidFor(context);
});

templates.application\.hbs

<button type="button" {{on "click" this.toggleMode}}>
  Toggle Mode
</button>

{{#if this.isModeA}}
  <BsTab @fade={{false}} as |tab|>
    <tab.pane @title="Mode A">
      <CustomComponentA @active={{this.currentObj}} />
    </tab.pane>
  </BsTab>
{{else}}
  <BsTab @fade={{false}} as |tab|>
    <tab.pane @title="Mode B">
      <CustomComponentB @active={{this.currentObj}} />
    </tab.pane>
  </BsTab>
{{/if}}

templates.components.bs-tab.tab-pane\.hbs

<h3>Tab Pane {{guid-for this}}</h3>

{{yield}}

templates.components.bs-tab\.hbs

<h2>BsTab {{guid-for this}}</h2>

{{yield (hash
  pane=(component "bs-tab/tab-pane")
)}}

templates.components.custom-component-a\.hbs

<p>CustomComponentA</p>

templates.components.custom-component-b\.hbs

<p>CustomComponentB</p>

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"
  }
}