Dynamic placeholder text in 'Plain text' field type

Question

I have a plain text field that encourages content editors to write a more detailed description of a piece of content.

However, on the front-end the template will use the post title by default if this is not supplied.

I would like the placeholder text for this optional plain text field to represent the reality of this in the Dashboard - i.e. to display the title field as the placeholder if the field has not otherwise been used.

When editing the field, I have tried setting the 'Placeholder Text' as {title}, but this does not work - it displays "{title}"!

Is this possible? I don't want to create a new custom type of field as it seems a little heavy handed for this use case.

Answer 1

When editing the field, I have tried setting the 'Placeholder Text' as {title}, but this does not work - it displays "{title}"!

Yeah, those placeholder text fields aren't dynamically parsed as Twig templates like others (Entry URL Format, etc.).

I don't want to create a new custom type of field as it seems a little heavy handed for this use case.

Unfortunately that's all that is coming to mind for me for this use-case.