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Maria Hutt b7b383bee0 fix(tabs, tab-bar): use standalone tab bar in Vue, React (#29940)
Issue number: resolves #29885, resolves #29924

---------

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issue. -->

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

React and Vue:

Tab bar could be a standalone element within `IonTabs` and would
navigate without issues with a router outlet before v8.3:

```tsx
<IonTabs>
  <IonRouterOutlet></IonRouterOutlet>

  <IonTabBar></IonTabBar>
</IonTabs>
```

It would work as if it was written as:

```tsx
<IonTabs>
  <IonRouterOutlet></IonRouterOutlet>

  <IonTabBar slot="bottom">
    <!-- Buttons -->
  </IonTabBar>
</IonTabs>
```

After v8.3, any `ion-tab-bar` that was not a direct child of `ion-tabs`
would lose it's expected behavior when used with a router outlet. If a
user clicked on a tab button, then the content would not be redirected
to that expected view.

React only:

Users can no longer add a `ref` to the `IonRouterOutlet`, it always
returns undefined.

```
<IonTabs>
      <IonRouterOutlet ref={ref}>

     <IonTabBar slot="bottom">
    <!-- Buttons -->
  </IonTabBar>
</IonTabs>
```

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

The fixes were already reviewed through PR
https://github.com/ionic-team/ionic-framework/pull/29925 and PR
https://github.com/ionic-team/ionic-framework/pull/29927. I split them
to make it easier to review.

React and Vue:

The React tabs has been updated to pass data to the tab bar through
context instead of passing it through a ref. By using a context, the
data will be available for the tab bar to use regardless of its level.

React only:

Reverted the logic for `routerOutletRef` and added a comment of the
importance of it.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!--
  If this introduces a breaking change:
1. Describe the impact and migration path for existing applications
below.
  2. Update the BREAKING.md file with the breaking change.
3. Add "BREAKING CHANGE: [...]" to the commit description when merging.
See
https://github.com/ionic-team/ionic-framework/blob/main/docs/CONTRIBUTING.md#footer
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## Other information

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

N/A
2024-10-16 18:08:54 +00:00
..
2024-10-02 17:08:43 +00:00
2024-10-02 17:08:43 +00:00

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