Grid and TreeList Date Filter Input Renders with "undefined" Placeholder in the Grid Filter Menu #4670
Description
Description
Binding the placeholder input to falsy values yield undesired rendering of the stringified value on the underlying HTML Input element's placeholder attribute - e.g. placeholder="undefined/null...".
This causes accessibility issues:
Screen readers (e.g., NVDA) announce "undefined" as the field’s name or placeholder, confusing users.
Accessibility tools (e.g., WAVE) flag this as a failure.
Steps To Reproduce
https://stackblitz.com/edit/angular-hny3pr26?file=src%2Fapp%2Fapp.component.ts
Screenshots or video
The problem also propagates to all other components that internally use the DateInput - date/datetime pickers, date filter menus in Grid and TreeList, etc.
Expected Behavior
The placeholder should never be set to "undefined/null". If no placeholder is provided, it should be omitted or use a localized example format (e.g., "dd.mm.yyyy").