[Bug] Setting selected item to null loses placeholder text

Description Setting the bound value to null doesn’t restore the placeholder text.

To Reproduce

1. In sample project, Index.razor, Blazored Typeahead - Form example, change SelectedTemplate to handle null so this doesn’t crash:

<SelectedTemplate Context="person">
    @person?.Firstname
</SelectedTemplate>

1. Change HandleFormSubmit as follows:

private void HandleFormSubmit()
{
    Console.WriteLine("Form Submitted Successfully!");
    FormModel.SelectedPerson = null; //I assume this is how you clear the typeahead?
}

1. Run sample and submit form. Text clears but placeholder text doesn’t come back.

Expected behavior Placeholder text is restored when bound value is set to null.

Screenshots Expected:

Actual:

Hosting Model:

• Blazor WebAssembly

Additional context Add any other context about the problem here.

[chrissainty]

@kamranghamsari This requires some investigation and I don’t have any free time for this right now. Feel free to look into it and propose a solution.

[dsfridayslab]

I had this issue as well. Not sure if the cause is the same, but when I experienced the issue, I was setting the bind-value property to a nullable string with string.Empty as the default value.

I fixed it by removing the default value, so the bound property is null and not empty string.