HTML Sanitization
The new Vaadin version updates the Jsoup version to 1.20.1 in which the HTML sanitization logic was modified. Some cases are now sanitized differently, for example:

Frontend Validation for Date Time Picker
The frontend validation for Date-Time Picker (@UIDateTimeField) have changed. We could not detect any negative impact for linkki applications. If you experience any unexpected behaviors, please do not hesitate to contact us.

Manual value updates in Custom Field
CustomField now has a manual update mode. If enabled, it will no longer automatically update its values when any of its contained fields change. Instead, updateValue() must be called manually, which can reduce unnecessary intermediate updates.

Upload and download Handling
A new API for file upload and download has been introduced. Users with custom components for upload or download may need to migrate to the new API. See the Vaadin documentation for details.

Static asset management with @NpmPackage
@NpmPackage is used to declare static assets from npm packages. During build time, these asset files are copied into the frontend and no theme.json entries are needed.

Improved tool tip discoverability with styling hooks
Elements with tooltips now expose a `has-tooltip' attribute. This attribute can be used to add visual indicators in CSS for when the tooltip is available.

BindHeight
A new aspect annotation @BindHeight has been added to define the height of a UI component, e.g., to set a fixed size for table components or other components that benefit from a consistent display area.

BindWidth
A new aspect annotation @BindWidth has been added to define the width of a UI component, e.g., to set a fixed size for date fields or other components that benefit from a consistent display area.

BindHelperText
A new aspect annotation @BindHelperText has been added to show additional information for a field, e.g., regarding its format requirement or purpose.

UINestedComponent with multiple PMOs
This version adds support for returning multiple PMOs as a SequencedCollection<Object> in the UINestedComponent annotation. See chapter "Nested Components" for more information.

Clear button for UIDateField, UITimeField and UIDateTimeField
Date and time fields now have a clear button to erase the current value. This helps in situations when it is faster to first erase the former value and then insert a new one.

New utility class for set-up: KaribuUI
linkki provides KaribuUIExtension that can be used with @ExtendWith or @RegisterExtension to set up the Vaadin UI for Karibu testing. However, this only works well for test classes in which the set-up is the same for each method.
This version introduces a new utility class KaribuUI that can be used to set up and tear down explicitly by method call. This can be used to create a different set-up for each method, as well as test classes that do not tear down after each method, but only once for the whole class.
With this change, the configuration class KaribuConfiguration was moved to the top level. Static imports of this class may need to be adjusted. If the static method withDefaults is currently used with KaribuUIExtension.withConfigution (KaribuUIExtension.withConfiguration(withDefaults().setSomething()), consider changing the usage to KaribuUIExtension.withConfiguration(config → config.setSomething()).

KaribuUtils: browser refresh
KaribuUtils now has a new method UI#refresh with which a browser refresh can be simulated.

A localized converter for booleans replaces the previous default in the LinkkiConverterRegistry. Booleans will now be displayed as a localized variant of "Yes" or "No" when used with @UILabel.

A new section UI Tests has been added to the linkki tutorial, demonstrating how to write unit UI tests with Karibu-Testing.

This version is tested for compatibility with Java 25.
Note that when using components that use CompletableFuture as return types in low-parallelism environments, it may be necessary to set the system property java.util.concurrent.ForkJoinPool.common.parallelism to a value of 2 or higher to avoid potential timeouts.

Grid selection only updates the bindings on changes from client
Selection listeners in GridSelectionAspectDefinition now check ComponentEvent#isFromClient to ensure model updates only occur for user-initiated events. This reduces the number of unnecessary updates significantly.
With this fix, setting the selection programmatically using the Vaadin API does not result in an update of all bindings anymore. While this is the expected behaviors, implementations that previously relied on the binding update may need to be adjusted.

No focus loss during tab traversal in @UITableComponent
Entering a value into a cell inside a table created with @UITableComponent and traversing with the tab key no longer results in losing focus.

@BindReadOnlyBehavior with components other than UIButton
@BindReadOnlyBehavior now also works with components other than UIButton.

Testbench Extension: error screenshots before @AfterEach methods
Failing UI tests now record an error screenshot before any cleanup is done in @AfterEach methods.
Before this change, error screenshots were taken after cleanup was done by these methods. This sometimes prevents seeing the actual UI state when the error occurred, e.g. when the cleanup logs out of the application.

Testing: @WithLocale in parameterized tests
The annotation WithLocale now works correctly with @ParameterizedTest.

Testing: KaribuUIExtension sets locale on refresh
When setting locale using KaribuUIExtension or WithLocale, the locale is now preserved upon Page#reload.

Correct publishing of linkki-bom
The linkki-bom was published incorrectly and did not contain any dependencyManagement entries. This issue affects only version 2.8.0 and previous alpha version.