fix(radio): radios can be focused and are announced with group (#27817)

Issue number: resolves #27438

---------

<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->

<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

There are a few issues with the modern radio syntax:

1. The native radio is inside the Shadow DOM. As a result, radios are
not announced with their parent group with screen readers (i.e. "1 of
3")
2. The native radio cannot be focused inside of `ion-select-popover` on
Firefox.
3. The `ionFocus` and `ionBlur` events do not fire.

I also discovered an issue with item:

1. Items inside of a Radio Group have a role of `listitem` which prevent
radios from being grouped correctly in some browsers. According to
https://bugzilla.mozilla.org/show_bug.cgi?id=1840916, browsers are
behaving correctly here. The `listitem` role should not be present when
an item is used in a radio group (even if the radio group itself is
inside a list).

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

Most of the changes are test-related, but I broke it down per commit to
make this easier to review:


ae77002afd

- Item no longer has `role="listitem"` when used inside of a radio
group.
- Added spec tests to verify the role behavior


0a9b7fb91d

- I discovered that some the legacy basic test were accidentally using
the modern syntax. I corrected this by adding `legacy="true"` to the
radios.


a8a90e53b2,
412d1d54e7,
and
1d1179b69a

- The current radio group tests only tested the legacy radio syntax, and
not the modern syntax.
- I created a `legacy` directory to house the legacy syntax tests.
- I created new tests in the root test directory for the modern syntax.
- I also deleted the screenshots for the modern tests here because the
tests for `ion-radio` already take screenshots of the radio (even in an
item).


e2c966e68b
- Moved radio roles to the host. This allows Firefox to focus radios and
for screen readers to announce the radios as part of a group.
- I also added focus/blur listeners so ionFocus and ionBlur fire


f10eff47a5

- I cleaned up the tests here to use a common radio fixture

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

I tested this with the following setups. ✅ indicates the screen reader
announces the group count (i.e. "1 of 4"). ❌ indicates the screen reader
does not announce the group count.

**Radio in Radio Group:**
- iOS + VoiceOver: ✅
- Android + TalkBack: ✅
- macOS + VoiceOver + Safari: ✅
- macOS + VoiceOver + Firefox: ✅
- macOS + VoiceOver + Chrome: ✅
- Windows + NVDA + Chrome: ✅
- Windows + NVDA + Firefox: ✅

**Radio in Item in Radio Group :**
- iOS + VoiceOver: ✅
- Android + TalkBack: ❌
(https://bugs.chromium.org/p/chromium/issues/detail?id=1459006)
- macOS + VoiceOver + Safari: ✅
- macOS + VoiceOver + Firefox: ✅
- macOS + VoiceOver + Chrome: ❌
(https://bugs.chromium.org/p/chromium/issues/detail?id=1459003)
- Windows + NVDA + Chrome: ✅
- Windows + NVDA + Firefox: ✅

core/src/components/item/item.tsx

@@ -398,7 +398,7 @@ export class Item implements ComponentInterface, AnchorInterface, ButtonInterfac
     });
     const ariaDisabled = disabled || childStyles['item-interactive-disabled'] ? 'true' : null;
     const fillValue = fill || 'none';
-    const inList = hostContext('ion-list', this.el);
+    const inList = hostContext('ion-list', this.el) && !hostContext('ion-radio-group', this.el);
 
     return (
       <Host

core/src/components/item/test/a11y/item.spec.ts

@@ -0,0 +1,51 @@
+import { Radio } from '../../../radio/radio.tsx';
+import { RadioGroup } from '../../../radio-group/radio-group.tsx';
+import { Item } from '../../item.tsx';
+import { List } from '../../../list/list.tsx';
+import { newSpecPage } from '@stencil/core/testing';
+
+describe('ion-item', () => {
+  it('should not have a role when used without list', async () => {
+    const page = await newSpecPage({
+      components: [Item],
+      html: `<ion-item>Hello World</ion-item>`,
+    });
+
+    const item = page.body.querySelector('ion-item');
+    expect(item.getAttribute('role')).toBe(null);
+  });
+
+  it('should have a listitem role when used inside list', async () => {
+    const page = await newSpecPage({
+      components: [Item, List],
+      html: `
+        <ion-list>
+          <ion-item>
+            Hello World
+          </ion-item>
+        </ion-list>
+      `,
+    });
+
+    const item = page.body.querySelector('ion-item');
+    expect(item.getAttribute('role')).toBe('listitem');
+  });
+
+  it('should not have a role when used inside radio group and list', async () => {
+    const page = await newSpecPage({
+      components: [Radio, RadioGroup, Item, List],
+      html: `
+        <ion-list>
+          <ion-radio-group value="a">
+            <ion-item>
+              <ion-radio value="other-value" aria-label="my radio"></ion-radio>
+            </ion-item>
+          </ion-radio-group>
+        </ion-list>
+      `,
+    });
+
+    const item = page.body.querySelector('ion-item');
+    expect(item.getAttribute('role')).toBe(null);
+  });
+});

core/src/components/radio-group/test/basic/index.html

@@ -30,23 +30,19 @@
             </ion-list-header>
 
             <ion-item>
-              <ion-label>Item 1</ion-label>
-              <ion-radio value="1" slot="start"></ion-radio>
+              <ion-radio value="1">Item 1</ion-radio>
             </ion-item>
 
             <ion-item>
-              <ion-label>Item 2</ion-label>
-              <ion-radio value="2" slot="start"></ion-radio>
+              <ion-radio value="2">Item 2</ion-radio>
             </ion-item>
 
             <ion-item>
-              <ion-label>Item 3</ion-label>
-              <ion-radio value="3" slot="start"></ion-radio>
+              <ion-radio value="3">Item 3</ion-radio>
             </ion-item>
 
             <ion-item>
-              <ion-label>Item 4</ion-label>
-              <ion-radio value="4" slot="start"></ion-radio>
+              <ion-radio value="4">Item 4</ion-radio>
             </ion-item>
           </ion-radio-group>
         </ion-list>

core/src/components/radio-group/test/basic/radio-group.e2e.ts

@@ -1,19 +1,7 @@
 import { expect } from '@playwright/test';
-import type { Locator } from '@playwright/test';
 import { configs, test } from '@utils/test/playwright';
-import type { E2EPage } from '@utils/test/playwright';
 
-configs().forEach(({ title, screenshot, config }) => {
-  test.describe(title('radio-group: basic'), () => {
-    test('should not have visual regressions', async ({ page }) => {
-      await page.goto(`/src/components/radio-group/test/basic`, config);
-
-      const list = page.locator('ion-list');
-
-      await expect(list).toHaveScreenshot(screenshot(`radio-group-diff`));
-    });
-  });
-});
+import { RadioFixture } from '../fixtures';
 
 /**
  * This behavior does not vary across modes/directions.
@@ -31,8 +19,7 @@ configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) =>
         `
         <ion-radio-group value="one" allow-empty-selection="false">
           <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
+            <ion-radio id="one" value="one">One</ion-radio>
           </ion-item>
         </ion-radio-group>
       `,
@@ -48,8 +35,7 @@ configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) =>
         `
         <ion-radio-group value="one" allow-empty-selection="true">
           <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
+            <ion-radio id="one" value="one">One</ion-radio>
           </ion-item>
         </ion-radio-group>
       `,
@@ -65,8 +51,7 @@ configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) =>
         `
         <ion-radio-group value="one" allow-empty-selection="false">
           <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
+            <ion-radio id="one" value="one">One</ion-radio>
           </ion-item>
         </ion-radio-group>
       `,
@@ -82,8 +67,7 @@ configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) =>
         `
         <ion-radio-group value="one" allow-empty-selection="true">
           <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
+            <ion-radio id="one" value="one">One</ion-radio>
           </ion-item>
         </ion-radio-group>
       `,
@@ -99,18 +83,15 @@ configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) =>
         `
         <ion-radio-group value="1">
           <ion-item>
-            <ion-label>Item 1</ion-label>
-            <ion-radio value="1" slot="start"></ion-radio>
+            <ion-radio value="1">Item 1</ion-radio>
           </ion-item>
 
           <ion-item>
-            <ion-label>Item 2</ion-label>
-            <ion-radio value="2" slot="start"></ion-radio>
+            <ion-radio value="2">Item 2</ion-radio>
           </ion-item>
 
           <ion-item>
-            <ion-label>Item 3</ion-label>
-            <ion-radio value="3" slot="start"></ion-radio>
+            <ion-radio value="3">Item 3</ion-radio>
           </ion-item>
         </ion-radio-group>
       `,
@@ -130,34 +111,3 @@ configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) =>
     });
   });
 });
-
-class RadioFixture {
-  readonly page: E2EPage;
-
-  private radio!: Locator;
-
-  constructor(page: E2EPage) {
-    this.page = page;
-  }
-
-  async checkRadio(method: 'keyboard' | 'mouse', selector = 'ion-radio') {
-    const { page } = this;
-    const radio = (this.radio = page.locator(selector));
-
-    if (method === 'keyboard') {
-      await radio.focus();
-      await page.keyboard.press('Space');
-    } else {
-      await radio.click();
-    }
-
-    await page.waitForChanges();
-
-    return radio;
-  }
-
-  async expectChecked(state: boolean) {
-    const { radio } = this;
-    await expect(radio.locator('input')).toHaveJSProperty('checked', state);
-  }
-}

core/src/components/radio-group/test/fixtures.ts

@@ -0,0 +1,39 @@
+import type { Locator } from '@playwright/test';
+import { expect } from '@playwright/test';
+import type { E2EPage } from '@utils/test/playwright';
+
+export class RadioFixture {
+  readonly page: E2EPage;
+
+  private radio!: Locator;
+
+  constructor(page: E2EPage) {
+    this.page = page;
+  }
+
+  async checkRadio(method: 'keyboard' | 'mouse', selector = 'ion-radio') {
+    const { page } = this;
+    const radio = (this.radio = page.locator(selector));
+
+    if (method === 'keyboard') {
+      await radio.focus();
+      await page.keyboard.press('Space');
+    } else {
+      await radio.click();
+    }
+
+    await page.waitForChanges();
+
+    return radio;
+  }
+
+  async expectChecked(state: boolean) {
+    const { radio } = this;
+
+    if (state) {
+      await expect(radio).toHaveClass(/radio-checked/);
+    } else {
+      await expect(radio).not.toHaveClass(/radio-checked/);
+    }
+  }
+}

core/src/components/radio-group/test/form/index.html

@@ -31,32 +31,19 @@
               </ion-list-header>
 
               <ion-item>
-                <ion-label
-                  >Biff
-                  <span id="biff"></span>
-                </ion-label>
-                <ion-radio value="biff" slot="start"></ion-radio>
+                <ion-radio value="biff">Biff</ion-radio>
               </ion-item>
 
               <ion-item>
-                <ion-label
-                  >Griff
-                  <span id="griff"></span>
-                </ion-label>
-                <ion-radio value="griff" slot="start"></ion-radio>
+                <ion-radio value="griff">Griff</ion-radio>
               </ion-item>
 
               <ion-item>
-                <ion-label
-                  >Buford
-                  <span id="buford"></span>
-                </ion-label>
-                <ion-radio value="buford" slot="start"></ion-radio>
+                <ion-radio value="buford">Buford</ion-radio>
               </ion-item>
 
               <ion-item>
-                <ion-label>George</ion-label>
-                <ion-radio value="george" disabled slot="start"></ion-radio>
+                <ion-radio value="george" disabled>George</ion-radio>
               </ion-item>
 
               <ion-item>

core/src/components/radio-group/test/legacy/basic/index.html

@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="UTF-8" />
+    <title>Radio Group - Basic</title>
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
+    />
+    <link href="../../../../../css/ionic.bundle.css" rel="stylesheet" />
+    <link href="../../../../../scripts/testing/styles.css" rel="stylesheet" />
+    <script src="../../../../../scripts/testing/scripts.js"></script>
+    <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
+    <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
+  </head>
+
+  <body>
+    <ion-app>
+      <ion-header>
+        <ion-toolbar>
+          <ion-title>Radio Group - Basic</ion-title>
+        </ion-toolbar>
+      </ion-header>
+
+      <ion-content>
+        <ion-list>
+          <ion-radio-group name="items" id="group" value="1">
+            <ion-list-header>
+              <ion-label>Radio Group Header</ion-label>
+            </ion-list-header>
+
+            <ion-item>
+              <ion-label>Item 1</ion-label>
+              <ion-radio value="1" slot="start"></ion-radio>
+            </ion-item>
+
+            <ion-item>
+              <ion-label>Item 2</ion-label>
+              <ion-radio value="2" slot="start"></ion-radio>
+            </ion-item>
+
+            <ion-item>
+              <ion-label>Item 3</ion-label>
+              <ion-radio value="3" slot="start"></ion-radio>
+            </ion-item>
+
+            <ion-item>
+              <ion-label>Item 4</ion-label>
+              <ion-radio value="4" slot="start"></ion-radio>
+            </ion-item>
+          </ion-radio-group>
+        </ion-list>
+      </ion-content>
+    </ion-app>
+  </body>
+</html>

core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts

@@ -0,0 +1,163 @@
+import { expect } from '@playwright/test';
+import type { Locator } from '@playwright/test';
+import { configs, test } from '@utils/test/playwright';
+import type { E2EPage } from '@utils/test/playwright';
+
+configs().forEach(({ title, screenshot, config }) => {
+  test.describe(title('radio-group: basic'), () => {
+    test('should not have visual regressions', async ({ page }) => {
+      await page.goto(`/src/components/radio-group/test/legacy/basic`, config);
+
+      const list = page.locator('ion-list');
+
+      await expect(list).toHaveScreenshot(screenshot(`radio-group-diff`));
+    });
+  });
+});
+
+/**
+ * This behavior does not vary across modes/directions.
+ */
+configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
+  test.describe(title('radio-group: interaction'), () => {
+    let radioFixture: RadioFixture;
+
+    test.beforeEach(({ page }) => {
+      radioFixture = new RadioFixture(page);
+    });
+
+    test('spacebar should not deselect without allowEmptySelection', async ({ page }) => {
+      await page.setContent(
+        `
+        <ion-radio-group value="one" allow-empty-selection="false">
+          <ion-item>
+            <ion-label>One</ion-label>
+            <ion-radio id="one" value="one"></ion-radio>
+          </ion-item>
+        </ion-radio-group>
+      `,
+        config
+      );
+
+      await radioFixture.checkRadio('keyboard');
+      await radioFixture.expectChecked(true);
+    });
+
+    test('spacebar should deselect with allowEmptySelection', async ({ page }) => {
+      await page.setContent(
+        `
+        <ion-radio-group value="one" allow-empty-selection="true">
+          <ion-item>
+            <ion-label>One</ion-label>
+            <ion-radio id="one" value="one"></ion-radio>
+          </ion-item>
+        </ion-radio-group>
+      `,
+        config
+      );
+
+      await radioFixture.checkRadio('keyboard');
+      await radioFixture.expectChecked(false);
+    });
+
+    test('click should not deselect without allowEmptySelection', async ({ page }) => {
+      await page.setContent(
+        `
+        <ion-radio-group value="one" allow-empty-selection="false">
+          <ion-item>
+            <ion-label>One</ion-label>
+            <ion-radio id="one" value="one"></ion-radio>
+          </ion-item>
+        </ion-radio-group>
+      `,
+        config
+      );
+
+      await radioFixture.checkRadio('mouse');
+      await radioFixture.expectChecked(true);
+    });
+
+    test('click should deselect with allowEmptySelection', async ({ page }) => {
+      await page.setContent(
+        `
+        <ion-radio-group value="one" allow-empty-selection="true">
+          <ion-item>
+            <ion-label>One</ion-label>
+            <ion-radio id="one" value="one"></ion-radio>
+          </ion-item>
+        </ion-radio-group>
+      `,
+        config
+      );
+
+      await radioFixture.checkRadio('mouse');
+      await radioFixture.expectChecked(false);
+    });
+
+    test('programmatically assigning a value should update the checked radio', async ({ page }) => {
+      await page.setContent(
+        `
+        <ion-radio-group value="1">
+          <ion-item>
+            <ion-label>Item 1</ion-label>
+            <ion-radio value="1" slot="start"></ion-radio>
+          </ion-item>
+
+          <ion-item>
+            <ion-label>Item 2</ion-label>
+            <ion-radio value="2" slot="start"></ion-radio>
+          </ion-item>
+
+          <ion-item>
+            <ion-label>Item 3</ion-label>
+            <ion-radio value="3" slot="start"></ion-radio>
+          </ion-item>
+        </ion-radio-group>
+      `,
+        config
+      );
+
+      const radioGroup = page.locator('ion-radio-group');
+      const radioOne = page.locator('ion-radio[value="1"]');
+      const radioTwo = page.locator('ion-radio[value="2"]');
+
+      await radioGroup.evaluate((el: HTMLIonRadioGroupElement) => (el.value = '2'));
+
+      await page.waitForChanges();
+
+      await expect(radioOne).not.toHaveClass(/radio-checked/);
+      await expect(radioTwo).toHaveClass(/radio-checked/);
+    });
+  });
+});
+
+class RadioFixture {
+  readonly page: E2EPage;
+
+  private radio!: Locator;
+
+  constructor(page: E2EPage) {
+    this.page = page;
+  }
+
+  async checkRadio(method: 'keyboard' | 'mouse', selector = 'ion-radio') {
+    const { page } = this;
+    const radio = (this.radio = page.locator(selector));
+
+    if (method === 'keyboard') {
+      await radio.focus();
+      await page.keyboard.press('Space');
+    } else {
+      await radio.click();
+    }
+
+    await page.waitForChanges();
+
+    return radio;
+  }
+
+  async expectChecked(state: boolean) {
+    const { radio } = this;
+    await expect(radio.locator('input')).toHaveJSProperty('checked', state);
+  }
+}

core/src/components/radio-group/test/legacy/form/index.html

@@ -0,0 +1,114 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="UTF-8" />
+    <title>Radio Group - Form</title>
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
+    />
+    <link href="../../../../../css/ionic.bundle.css" rel="stylesheet" />
+    <link href="../../../../../scripts/testing/styles.css" rel="stylesheet" />
+    <script src="../../../../../scripts/testing/scripts.js"></script>
+    <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
+    <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
+  </head>
+
+  <body>
+    <ion-app>
+      <ion-header>
+        <ion-toolbar>
+          <ion-title>Radio Group - Form</ion-title>
+        </ion-toolbar>
+      </ion-header>
+
+      <ion-content class="outer-content">
+        <form>
+          <ion-list>
+            <ion-radio-group name="tannen" id="group" value="biff">
+              <ion-list-header>
+                <ion-label>Luckiest Man On Earth</ion-label>
+              </ion-list-header>
+
+              <ion-item>
+                <ion-label
+                  >Biff
+                  <span id="biff"></span>
+                </ion-label>
+                <ion-radio value="biff" slot="start"></ion-radio>
+              </ion-item>
+
+              <ion-item>
+                <ion-label
+                  >Griff
+                  <span id="griff"></span>
+                </ion-label>
+                <ion-radio value="griff" slot="start"></ion-radio>
+              </ion-item>
+
+              <ion-item>
+                <ion-label
+                  >Buford
+                  <span id="buford"></span>
+                </ion-label>
+                <ion-radio value="buford" slot="start"></ion-radio>
+              </ion-item>
+
+              <ion-item>
+                <ion-label>George</ion-label>
+                <ion-radio value="george" disabled slot="start"></ion-radio>
+              </ion-item>
+
+              <ion-item>
+                <ion-button type="submit">Submit</ion-button>
+              </ion-item>
+            </ion-radio-group>
+          </ion-list>
+        </form>
+
+        <p style="margin: 20px">
+          Value:
+          <span id="value"></span>
+        </p>
+
+        <p style="margin: 20px">
+          Changes:
+          <span id="changes">0</span>
+        </p>
+      </ion-content>
+
+      <style>
+        .outer-content {
+          --background: #f2f2f2;
+        }
+      </style>
+      <script>
+        var changes = 0;
+
+        document.getElementById('group').addEventListener('ionChange', function (ev) {
+          document.getElementById('value').textContent = ev.detail.value;
+          changes++;
+          document.getElementById('changes').textContent = changes;
+        });
+
+        var biff = 0;
+        document.querySelector('[value="biff"]').addEventListener('ionSelect', function (ev) {
+          biff++;
+          document.getElementById('biff').textContent = biff;
+        });
+
+        var griff = 0;
+        document.querySelector('[value="griff"]').addEventListener('ionSelect', function (ev) {
+          griff++;
+          document.getElementById('griff').textContent = griff;
+        });
+
+        var buford = 0;
+        document.querySelector('[value="buford"]').addEventListener('ionSelect', function (ev) {
+          buford++;
+          document.getElementById('buford').textContent = buford;
+        });
+      </script>
+    </ion-app>
+  </body>
+</html>

core/src/components/radio-group/test/legacy/form/radio-group.e2e.ts

@@ -0,0 +1,35 @@
+import { expect } from '@playwright/test';
+import { configs, test } from '@utils/test/playwright';
+
+configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
+  test.describe(title('radio-group: form'), () => {
+    test.beforeEach(async ({ page }) => {
+      await page.goto('/src/components/radio-group/test/legacy/form', config);
+    });
+
+    test('selecting an option should update the value', async ({ page }) => {
+      const radioGroup = page.locator('ion-radio-group');
+      const ionChange = await page.spyOnEvent('ionChange');
+      const griffRadio = page.locator('ion-radio[value="griff"]');
+      await expect(radioGroup).toHaveAttribute('value', 'biff');
+
+      await griffRadio.click();
+      await page.waitForChanges();
+
+      await expect(ionChange).toHaveReceivedEventDetail({ value: 'griff', event: { isTrusted: true } });
+    });
+
+    test('selecting a disabled option should not update the value', async ({ page }) => {
+      const value = page.locator('#value');
+      const disabledRadio = page.locator('ion-radio[value="george"]');
+
+      await expect(value).toHaveText('');
+      await expect(disabledRadio).toHaveAttribute('disabled', '');
+
+      await disabledRadio.click({ force: true });
+      await page.waitForChanges();
+
+      await expect(value).toHaveText('');
+    });
+  });
+});

core/src/components/radio-group/test/legacy/search/index.html

@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+  <head>
+    <meta charset="UTF-8" />
+    <title>Radio Group - Search</title>
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
+    />
+    <link href="../../../../../css/ionic.bundle.css" rel="stylesheet" />
+    <link href="../../../../../scripts/testing/styles.css" rel="stylesheet" />
+    <script src="../../../../../scripts/testing/scripts.js"></script>
+    <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
+    <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
+  </head>
+
+  <body>
+    <ion-app>
+      <ion-header>
+        <ion-toolbar>
+          <ion-title>Radio Group - Form</ion-title>
+        </ion-toolbar>
+        <ion-toolbar>
+          <ion-searchbar placeholder="Type to filter..." debounce="0"></ion-searchbar>
+        </ion-toolbar>
+        <ion-toolbar>
+          <ion-note id="value">Current value:</ion-note>
+        </ion-toolbar>
+      </ion-header>
+
+      <ion-content class="outer-content">
+        <ion-radio-group allow-empty-selection></ion-radio-group>
+      </ion-content>
+
+      <style>
+        ion-note {
+          padding: 0 10px;
+        }
+      </style>
+      <script>
+        const radioGroup = document.querySelector('ion-radio-group');
+        const searchbar = document.querySelector('ion-searchbar');
+        const currentValue = document.querySelector('#value');
+
+        radioGroup.addEventListener('ionChange', (ev) => {
+          currentValue.innerText = `Current value: ${ev.detail.value}`;
+        });
+
+        searchbar.addEventListener('ionChange', (ev) => {
+          filter(ev.detail.value);
+        });
+
+        const filter = (value) => {
+          const query = value != null ? value.toLowerCase() : '';
+          const data = [
+            { id: 0, value: 'zero' },
+            { id: 1, value: 'one' },
+            { id: 2, value: 'two' },
+            { id: 3, value: 'three' },
+          ];
+
+          let html = '';
+
+          data.forEach((d) => {
+            if (d.value.includes(query)) {
+              html += `
+              <ion-item>
+                <ion-label>Item ${d.value}</ion-label>
+                <ion-radio value="${d.value}"></ion-radio>
+              </ion-item>
+            `;
+            }
+          });
+
+          radioGroup.innerHTML = html;
+        };
+
+        filter();
+      </script>
+    </ion-app>
+  </body>
+</html>

core/src/components/radio-group/test/legacy/search/radio-group.e2e.ts

@@ -0,0 +1,42 @@
+import { expect } from '@playwright/test';
+import { configs, test } from '@utils/test/playwright';
+
+/**
+ * This behavior does not var across modes/directions.
+ */
+configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
+  test.describe(title('radio-group'), () => {
+    test.beforeEach(async ({ page }) => {
+      await page.goto('/src/components/radio-group/test/legacy/search', config);
+    });
+
+    test.describe('radio-group: state', () => {
+      test('radio should remain checked after being removed/readded to the dom', async ({ page }) => {
+        const radioGroup = page.locator('ion-radio-group');
+        const radio = page.locator('ion-radio[value=two]');
+        const searchbarInput = page.locator('ion-searchbar input');
+
+        // select radio
+        await radio.click();
+        await expect(radio.locator('input')).toHaveJSProperty('checked', true);
+
+        // filter radio so it is not in DOM
+        await page.fill('ion-searchbar input', 'zero');
+        await searchbarInput.evaluate((el) => el.blur());
+        await page.waitForChanges();
+        await expect(radio).toBeHidden();
+
+        // ensure radio group has the same value
+        await expect(radioGroup).toHaveJSProperty('value', 'two');
+
+        // clear the search so the radio appears
+        await page.fill('ion-searchbar input', '');
+        await searchbarInput.evaluate((el) => el.blur());
+        await page.waitForChanges();
+
+        // ensure that the new radio instance is still checked
+        await expect(radio.locator('input')).toHaveJSProperty('checked', true);
+      });
+    });
+  });
+});

core/src/components/radio-group/test/search/index.html

@@ -65,8 +65,7 @@
             if (d.value.includes(query)) {
               html += `
               <ion-item>
-                <ion-label>Item ${d.value}</ion-label>
-                <ion-radio value="${d.value}"></ion-radio>
+                <ion-radio value="${d.value}">Item ${d.value}</ion-radio>
               </ion-item>
             `;
             }

core/src/components/radio-group/test/search/radio-group.e2e.ts

@@ -1,42 +1,41 @@
 import { expect } from '@playwright/test';
 import { configs, test } from '@utils/test/playwright';
 
+import { RadioFixture } from '../fixtures';
+
 /**
  * This behavior does not var across modes/directions.
  */
 configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
-  test.describe(title('radio-group'), () => {
-    test.beforeEach(async ({ page }) => {
+  test.describe(title('radio-group: search'), () => {
+    test('radio should remain checked after being removed/readded to the dom', async ({ page }) => {
       await page.goto('/src/components/radio-group/test/search', config);
-    });
 
-    test.describe('radio-group: state', () => {
-      test('radio should remain checked after being removed/readded to the dom', async ({ page }) => {
-        const radioGroup = page.locator('ion-radio-group');
-        const radio = page.locator('ion-radio[value=two]');
-        const searchbarInput = page.locator('ion-searchbar input');
+      const radioFixture = new RadioFixture(page);
 
-        // select radio
-        await radio.click();
-        await expect(radio.locator('input')).toHaveJSProperty('checked', true);
+      const radioGroup = page.locator('ion-radio-group');
+      const searchbarInput = page.locator('ion-searchbar input');
 
-        // filter radio so it is not in DOM
-        await page.fill('ion-searchbar input', 'zero');
-        await searchbarInput.evaluate((el) => el.blur());
-        await page.waitForChanges();
-        await expect(radio).toBeHidden();
+      // select radio
+      const radio = await radioFixture.checkRadio('mouse', 'ion-radio[value=two]');
+      await radioFixture.expectChecked(true);
 
-        // ensure radio group has the same value
-        await expect(radioGroup).toHaveJSProperty('value', 'two');
+      // filter radio so it is not in DOM
+      await page.fill('ion-searchbar input', 'zero');
+      await searchbarInput.evaluate((el) => el.blur());
+      await page.waitForChanges();
+      await expect(radio).toBeHidden();
 
-        // clear the search so the radio appears
-        await page.fill('ion-searchbar input', '');
-        await searchbarInput.evaluate((el) => el.blur());
-        await page.waitForChanges();
+      // ensure radio group has the same value
+      await expect(radioGroup).toHaveJSProperty('value', 'two');
 
-        // ensure that the new radio instance is still checked
-        await expect(radio.locator('input')).toHaveJSProperty('checked', true);
-      });
+      // clear the search so the radio appears
+      await page.fill('ion-searchbar input', '');
+      await searchbarInput.evaluate((el) => el.blur());
+      await page.waitForChanges();
+
+      // ensure that the new radio instance is still checked
+      await radioFixture.expectChecked(true);
     });
   });
 });

core/src/components/radio/radio.tsx

@@ -2,8 +2,7 @@ import type { ComponentInterface, EventEmitter } from '@stencil/core';
 import { Component, Element, Event, Host, Method, Prop, State, Watch, h } from '@stencil/core';
 import type { LegacyFormController } from '@utils/forms';
 import { createLegacyFormController } from '@utils/forms';
-import type { Attributes } from '@utils/helpers';
-import { addEventListener, getAriaLabel, inheritAriaAttributes, removeEventListener } from '@utils/helpers';
+import { addEventListener, getAriaLabel, removeEventListener } from '@utils/helpers';
 import { printIonWarning } from '@utils/logging';
 import { createColorClasses, hostContext } from '@utils/theme';
 
@@ -31,7 +30,6 @@ export class Radio implements ComponentInterface {
   private radioGroup: HTMLIonRadioGroupElement | null = null;
   private nativeInput!: HTMLInputElement;
   private legacyFormController!: LegacyFormController;
-  private inheritedAttributes: Attributes = {};
 
   // This flag ensures we log the deprecation warning at most once.
   private hasLoggedDeprecationWarning = false;
@@ -135,8 +133,7 @@ export class Radio implements ComponentInterface {
     ev.stopPropagation();
     ev.preventDefault();
 
-    const element = this.legacyFormController.hasLegacyControl() ? this.el : this.nativeInput;
-    element.focus();
+    this.el.focus();
   }
 
   /** @internal */
@@ -167,12 +164,6 @@ export class Radio implements ComponentInterface {
 
   componentWillLoad() {
     this.emitStyle();
-
-    if (!this.legacyFormController.hasLegacyControl()) {
-      this.inheritedAttributes = {
-        ...inheritAriaAttributes(this.el),
-      };
-    }
   }
 
   @Watch('checked')
@@ -201,7 +192,34 @@ export class Radio implements ComponentInterface {
   };
 
   private onClick = () => {
-    this.checked = this.nativeInput.checked;
+    const { radioGroup, checked } = this;
+
+    /**
+     * The legacy control uses a native input inside
+     * of the radio host, so we can set this.checked
+     * to the state of the nativeInput. RadioGroup
+     * will prevent the native input from checking if
+     * allowEmptySelection="false" by calling ev.preventDefault().
+     */
+    if (this.legacyFormController.hasLegacyControl()) {
+      this.checked = this.nativeInput.checked;
+      return;
+    }
+
+    /**
+     * The modern control does not use a native input
+     * inside of the radio host, so we cannot rely on the
+     * ev.preventDefault() behavior above. If the radio
+     * is checked and the parent radio group allows for empty
+     * selection, then we can set the checked state to false.
+     * Otherwise, the checked state should always be set
+     * to true because the checked state cannot be toggled.
+     */
+    if (checked && radioGroup?.allowEmptySelection) {
+      this.checked = false;
+    } else {
+      this.checked = true;
+    }
   };
 
   private onFocus = () => {
@@ -232,23 +250,14 @@ export class Radio implements ComponentInterface {
   }
 
   private renderRadio() {
-    const {
-      checked,
-      disabled,
-      inputId,
-      color,
-      el,
-      justify,
-      labelPlacement,
-      inheritedAttributes,
-      hasLabel,
-      buttonTabindex,
-    } = this;
+    const { checked, disabled, color, el, justify, labelPlacement, hasLabel, buttonTabindex } = this;
     const mode = getIonMode(this);
     const inItem = hostContext('ion-item', el);
 
     return (
       <Host
+        onFocus={this.onFocus}
+        onBlur={this.onBlur}
         onClick={this.onClick}
         class={createColorClasses(color, {
           [mode]: true,
@@ -261,21 +270,12 @@ export class Radio implements ComponentInterface {
           'ion-activatable': !inItem,
           'ion-focusable': !inItem,
         })}
+        role="radio"
+        aria-checked={checked ? 'true' : 'false'}
+        aria-disabled={disabled ? 'true' : null}
+        tabindex={buttonTabindex}
       >
         <label class="radio-wrapper">
-          {/*
-            The native control must be rendered
-            before the visible label text due to https://bugs.webkit.org/show_bug.cgi?id=251951
-          */}
-          <input
-            type="radio"
-            checked={checked}
-            disabled={disabled}
-            id={inputId}
-            tabindex={buttonTabindex}
-            ref={(nativeEl) => (this.nativeInput = nativeEl as HTMLInputElement)}
-            {...inheritedAttributes}
-          />
           <div
             class={{
               'label-text-wrapper': true,

core/src/components/radio/test/a11y/radio.e2e.ts

@@ -16,10 +16,7 @@ configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) =>
   });
 
   test.describe(title('radio: keyboard navigation'), () => {
-    test.beforeEach(async ({ page, skip }) => {
-      // TODO (FW-2979)
-      skip.browser('webkit', 'Safari 16 only allows text fields and pop-up menus to be focused.');
-
+    test.beforeEach(async ({ page }) => {
       await page.setContent(
         `
       <ion-app>

core/src/components/radio/test/legacy/basic/radio.e2e.ts

@@ -95,7 +95,7 @@ configs().forEach(({ title, screenshot, config }) => {
     test('should apply color correctly', async ({ page }) => {
       await page.setContent(
         `
-        <ion-radio slot="start" value="pepperoni" color="success"></ion-radio>
+        <ion-radio legacy="true" value="pepperoni" color="success"></ion-radio>
       `,
         config
       );
@@ -138,7 +138,7 @@ configs({ directions: ['ltr'] }).forEach(({ title, config }) => {
     test('radio should be checked when activated even without a radio group', async ({ page }) => {
       await page.setContent(
         `
-        <ion-radio slot="start" value="pepperoni"></ion-radio>
+        <ion-radio legacy="true" value="pepperoni"></ion-radio>
       `,
         config
       );