feat: UiPopover receives a close button in its flyout by default

addon/components/-internals/contextual-container/component.ts

@@ -1,6 +1,6 @@
 import type { EmberRunTimer } from '@ember/runloop/types';
 import Component from '@ember/component';
-import EmberObject, { computed, set } from '@ember/object';
+import EmberObject, { action, computed, set } from '@ember/object';
 import { reads, gt } from '@ember/object/computed';
 import { addObserver } from '@ember/object/observers';
 import { guidFor } from '@ember/object/internals';
@@ -780,6 +780,7 @@ export default class UiContextualContainer extends Component {
   /**
    * Yielded action to programmatically close from within the tooltip/flyout/whatever.
    */
+  @action
   protected close() {
     this.hide();
   }

addon/components/-internals/contextual-container/element/component.ts

@@ -100,6 +100,17 @@ export default class UiContextualElement extends Component {
 
   public testId?: string;
 
+  /**
+   * A method provided by the parent container to dismiss the positioned element.
+   */
+  public declare readonly close: () => void;
+
+  /**
+   * If true, a floating close button will be rendered at the top of the positioned
+   * element. This can be handy when using the "click" trigger.
+   */
+  public showCloseButton = false;
+
   /**
    * CSS class names for the element.
    */

addon/components/-internals/contextual-container/element/template.hbs

@@ -13,6 +13,14 @@
   @htmlTagName={{if this.titleText "section" "div"}}
 >
 	{{#if this.showArrow}}<div class="{{this.arrowClassName}}" data-popper-arrow></div>{{/if}}
+  {{#if this.showCloseButton}}
+    <button type="button"
+      aria-label="Close"
+      class="close"
+      onclick={{this.close}}
+    ><span aria-hidden="true">×</span>
+    </button>
+  {{/if}}
   {{#if this.titleText}}<header class="{{this.titleTextClassName}}">{{this.titleText}}</header>{{/if}}
 	<div class="{{this.innerClassName}}" style={{this.innerElementStyles}}>
 		{{yield}}

addon/components/-internals/contextual-container/template.hbs

@@ -22,12 +22,13 @@
   popperTarget       = this.triggerElement
   id                 = this.overlayElementId
   titleText          = this.title
+  close              = this.close
   testId             = this.testId
   showContent        = this._showOverlay
   isHidden           = this._isHidden
 }}
   {{#if (has-block)~}}
-    {{yield (hash close=(action this.close))}}
+    {{yield (hash close=this.close)}}
   {{~else~}}
     {{this.textContent}}
   {{~/if}}

addon/components/ui-popover/element/component.ts

@@ -10,6 +10,8 @@ export default class UiPopoverContextElement extends UiContextualElement {
 
   ariaRole = 'region';
 
+  showCloseButton = true;
+
   @computed('fade', 'actualPlacement', 'showContent')
   public get popperClassNames() {
     const classNames = ['popover', this.actualPlacement];

tests/integration/components/ui-popover-test.ts

@@ -8,61 +8,58 @@ module('Integration | Component | ui-popover', function (hooks) {
 
   test('it attaches event listeners to its parent element', async function (assert) {
     await render(hbs`
-      <button>
-        Foo <UiPopover @testId="tip">Hello World</UiPopover>
+      <button id="toggle">
+        Foo <UiPopover>Hello World</UiPopover>
       </button>
     `);
 
-    const overlay = find('.popover[data-test-id="tip"]') as Element;
+    const overlay = find('.popover') as Element;
 
     assert
-      .dom('button')
+      .dom('#toggle')
       .hasAttribute('aria-controls', overlay.id)
       .hasAttribute('aria-expanded', 'false');
-    assert.dom('.popover[data-test-id="tip"]').isNotVisible();
+    assert.dom('.popover').isNotVisible();
 
-    await click('button');
+    await click('#toggle');
 
-    assert.dom('button').hasAttribute('aria-expanded', 'true');
-    assert.dom('.popover[data-test-id="tip"]').isVisible().hasText('Hello World');
+    assert.dom('#toggle').hasAttribute('aria-expanded', 'true');
+    assert.dom('.popover .popover-content').isVisible().hasText('Hello World');
 
-    await click('button');
+    await click('#toggle');
 
-    assert.dom('.popover[data-test-id="tip"]').isNotVisible();
+    assert.dom('.popover').isNotVisible();
   });
 
   test('it is not closed by outside interactions', async function (assert) {
     await render(hbs`
       <button id="toggle">
-        Foo <UiPopover @testId="tip">Hello World</UiPopover>
+        Foo <UiPopover>Hello World</UiPopover>
       </button>
 
       <button id="other-button">Click Me</button>
     `);
 
-    assert.dom('.popover[data-test-id="tip"]').isNotVisible();
+    assert.dom('.popover').isNotVisible();
 
     await click('#toggle');
 
-    assert.dom('.popover[data-test-id="tip"]').isVisible();
+    assert.dom('.popover').isVisible();
 
     await click('#other-button');
 
-    assert.dom('.popover[data-test-id="tip"]').isVisible();
+    assert.dom('.popover').isVisible();
   });
 
   test('it accepts a heading', async function (assert) {
     await render(hbs`
       <button>
-        Foo <UiPopover @testId="tip" @title="Popover Title">Hello World</UiPopover>
+        Foo <UiPopover @title="Popover Title">Hello World</UiPopover>
       </button>
     `);
 
-    assert.dom('.popover[data-test-id="tip"]').hasTagName('section');
-    assert
-      .dom('.popover[data-test-id="tip"] .popover-title')
-      .hasTagName('header')
-      .hasText('Popover Title');
+    assert.dom('.popover').hasTagName('section');
+    assert.dom('.popover .popover-title').hasTagName('header').hasText('Popover Title');
   });
 
   test('it manages focus as though it were inline with its trigger', async function (assert) {
@@ -102,7 +99,7 @@ module('Integration | Component | ui-popover', function (hooks) {
 
     await triggerKeyEvent('#trigger', 'keydown', 'Tab');
 
-    assert.dom('.popover #username').isFocused();
+    assert.dom('.popover button[aria-label="Close"]').isFocused();
 
     await focus('.popover #submitLogin');
     await triggerKeyEvent('.popover', 'keydown', 'Tab');
@@ -113,9 +110,28 @@ module('Integration | Component | ui-popover', function (hooks) {
 
     assert.dom('.popover #submitLogin').isFocused();
 
-    await focus('.popover #username');
+    await focus('.popover button[aria-label="Close"]');
     await triggerKeyEvent('.popover', 'keydown', 'Tab', { shiftKey: true });
 
     assert.dom('#trigger').isFocused();
   });
+
+  test('it can be closed with its own close button', async function (assert) {
+    await render(hbs`
+      <button id="toggle">
+        Foo <UiPopover>Hello World</UiPopover>
+      </button>
+    `);
+
+    assert.dom('.popover').isNotVisible();
+
+    await click('#toggle');
+
+    assert.dom('.popover').isVisible();
+
+    await click('.popover button[aria-label="Close"]');
+
+    assert.dom('.popover').isNotVisible();
+    assert.dom('#toggle').isFocused();
+  });
 });