DBInput (Feature Request): Style Placeholder Text for `type="date"` in DBInput

[annsch]

Default text appears in black as if user input is present

In the current implementation, the default text in the type="date" input field is displayed in black. This gives the impression that the user has already entered a value.

Expected behavior:

The input field should display placeholder text in a lighter color (e.g., grey) to clearly indicate that no user input has been provided yet.

For reference, see how placeholders are handled in input fields such as Password, Search, or URL here:
https://design-system.deutschebahn.com/core-web/version/v2.0.9/components/data-input/input/overview?page=example+-+types+with+min+and+max

[mfranzke]

It seems like that we couldn't change the placeholder'esk copy in relation to whether it's filled out or not within these specific fields of types date, datetime-local, datetime-local, datetime-local and week, until :blank get's supported as a CSS selector. And :placeholder, which we use for the other input elements, is limited to elements that actually accept the related placeholder-HTML-Attribute: text, search, url, tel, email, password, number

Using the polyfill for this aspect isn't an option most likely, as the CSSWG seems to keep changing the specs.