fix: add locale fallback for MessageList to handle variants (#8417) (CP: 25.0) #8420
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* fix: add locale fallback for MessageList to handle variants (#8403) MessageList now gracefully handles locale variants (e.g., "de-DE-hw") by implementing a progressive fallback strategy when the full locale string is not valid for Intl.DateTimeFormat: 1. Try full locale (e.g., "de-DE-hw") 2. Fall back to base locale (e.g., "de-DE") 3. Fall back to language only (e.g., "de") 4. Fall back to browser default This prevents the component from crashing when custom locale variants are used for resource bundle customization. * Update vaadin-messages-flow-parent/vaadin-messages-flow-integration-tests/src/test/java/com/vaadin/flow/component/messages/tests/MessageListIT.java Co-authored-by: Diego Cardoso <diego@vaadin.com> * Update vaadin-messages-flow-parent/vaadin-messages-flow-integration-tests/src/main/java/com/vaadin/flow/component/messages/tests/MessageListPage.java Co-authored-by: Diego Cardoso <diego@vaadin.com> * refactor: avoid duplicate split operation in locale fallback Store the result of locale.split('-') in a variable to avoid calling it twice when building the fallback locale array. --------- Co-authored-by: Diego Cardoso <diego@vaadin.com>
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DiegoCardoso
approved these changes
Jan 7, 2026
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This PR cherry-picks changes from the original PR #8417 to branch 25.0.
Original PR description