BREAKING CHANGE:
The default value for the `--placeholder-opacity` CSS Variable on `ion-input`, `ion-searchbar`, `ion-select`, and `ion-textarea` has been updated to `0.6`.
resolves#25570, resolves#23213
BREAKING CHANGE:
The `--background` and `--background-checked` variables have been renamed to `--track-background` and `--track-background-checked`, respectively.
BREAKING CHANGE:
Datetime:
Passing the empty string to the `value` property will now error as it is not a valid ISO-8601 value.
Angular:
`null` values on form components will no longer be converted to the empty string (`''`) or `false`. This impacts `ion-checkbox`, `ion-datetime`, `ion-input`, `ion-radio`, `ion-radio-group`, ion-range`, `ion-searchbar`, `ion-segment`, `ion-select`, `ion-textarea`, and `ion-toggle`.
BREAKING CHANGE:
The `refresh` key has been removed from the `PickerColumn` interface. Developers should use the `columns` property to refresh the `ion-picker` view.
BREAKING CHANGE:
The `detail` payload for the `ionInput` event on `ion-input` and `ion-textarea` now contains an object with the current `value` as well as the native event that triggered `ionInput`.
resolves#25577
BREAKING CHANGE:
Datetime no longer incorrectly reports the time zone when `value` is updated. Datetime does not manage time zones, so any time zone information provided is ignored.
BREAKING CHANGE:
`ActionSheetAttributes`, `AlertAttributes`, `AlertTextareaAttributes`, `AlertInputAttributes`, `LoadingAttributes`, `ModalAttributes`, `PickerAttributes`, `PopoverAttributes`, and `ToastAttributes` have been removed. Developers should use `{ [key: string]: any }` instead.
BREAKING CHANGE:
- The card header has ben changed to a flex container with direction set to `column` (top to bottom). In `ios` mode the direction is set to `column-reverse` which results in the subtitle displaying on top of the title.
resolves#20873resolves#24452
BREAKING CHANGE
- `ionChange` is no longer emitted when the `value` property of `ion-datetime` is modified externally. `ionChange` is only emitted from user committed changes, such as clicking or tapping a date.
- Datetime no longer automatically adjusts the `value` property when passed an array and `multiple="false"`. Developers should update their apps to ensure they are using the API correctly.
BREAKING CHANGE:
Accordion Group no longer automatically adjusts the `value` property when passed an array and `multiple="false"`. Developers should update their apps to ensure they are using the API correctly.
BREAKING CHANGE:
`ionChange` is no longer emitted when the `value` of `ion-select` is modified externally. `ionChange` is only emitted from user committed changes, such as confirming a selected option in the select's overlay.
BREAKING CHANGE:
`@ionic/react` and `@ionic/react-router` no longer ship a CommonJS entry point. Instead, only an ES Module entry point is provided for improved compatibility with Vite.
resolves#25104
BREAKING CHANGE:
`@ionic/vue` and `@ionic/vue-router` no longer ship a CommonJS entry point. Instead, only an ES Module entry point is provided for improved compatibility with Vite.
BREAKING CHANGE:
- The `swipeToClose` property has been removed in favor of `canDismiss`.
- The `canDismiss` property now defaults to `true` and can no longer be set to `undefined`.
BREAKING CHANGE:
`ionChange` is no longer emitted when the `checked` property of `ion-checkbox` is modified externally. `ionChange` is only emitted from user committed changes, such as clicking or tapping the checkbox.
BREAKING CHANGE:
`ionChange` is no longer emitted when the `value` of `ion-accordion-group` is modified externally. `ionChange` is only emitted from user committed changes, such as clicking or tapping the accordion header.
resolves#17583
BREAKING CHANGE:
The `[hidden]` attribute has been removed from Ionic's global stylesheet. The `[hidden]` attribute can continue to be used, but developers will get the [native `hidden` implementation](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/hidden) instead. The main difference is that the native implementation is easier to override using `display` than Ionic's implementation.
Developers can add the following CSS to their global stylesheet if they need the old behavior:
```css
[hidden] {
display: none !important;
}
```
resolves#25802
BREAKING CHANGE:
Ionic now listens on the `keydown` event instead of the `keyup` event when determining when to dismiss overlays via the "Escape" key. Any applications that were listening on `keyup` to suppress this behavior should listen on `keydown` instead.
resolves#22976
BREAKING CHANGE: Updated the `placeholder` property on `ion-input`, `ion-textarea`, and `ion-select` to have a type of `string | undefined`.
