Description

After refactoring overlay-based components to keep their overlay in the shadow root, the overlayClass property will not be functional anymore, as the classes would be applied to the element in a shadow root. Instead, the regular class property should now be used to target overlays for styling.

The following components are affected:

• vaadin-avatar-group
• vaadin-confirm-dialog
• vaadin-context-menu
• vaadin-combo-box
• vaadin-date-picker
• vaadin-date-time-picker
• vaadin-dialog
• vaadin-login-overlay
• vaadin-menu-bar
• vaadin-multi-select-combo-box
• vaadin-popover
• vaadin-select
• vaadin-time-picker
• vaadin-tooltip

The exception is vaadin-notification, for which overlayClass still works as before.

Part of #9742

Type of change

• Breaking change