Blazorise RTE validations - validation

Question

I have a rich text editor from blazorise and I am trying to validate the input a user is writing. Specifically to not be empty. I have created a TextEdit invisible component in order to get that message, but it seems that my validation on textedit to not be triggered. I have a fluentvalidations check, and is not a form.
Here is what I am doing:
<FieldLabel>Viber message:</FieldLabel>
<RichTextEdit #ref="rteViberBody"
ContentChanged="#MyCheckRTEMethod"
PlaceHolder="Type your message here..."
ReadOnly="#readOnly"
SubmitOnEnter="false"
Style="height:80px">
<Editor>
</Editor>
<Toolbar>
<RichTextEditToolbarGroup Float="Float.End">
<RichTextEditToolbarButton Action="RichTextEditAction.Bold" />
<RichTextEditToolbarButton Action="RichTextEditAction.Italic" />
<RichTextEditToolbarButton Action="RichTextEditAction.Strike" />
<RichTextEditToolbarButton Action="RichTextEditAction.Image" />
<RichTextEditToolbarButton Action="RichTextEditAction.Clean" />
</RichTextEditToolbarGroup>
</Toolbar>
</RichTextEdit>
</Field>
</Fields>
<Fields>
<Field>
<Validation AsyncValidator="#ValidateRTEViberInputAsync">
<TextEdit #bind-Text="viberMessageHiddenForValidation" #bind-Text:event="oninput" Visibility="Visibility.Invisible">
<Feedback>
<ValidationError>Please type a message.</ValidationError>
</Feedback>
</TextEdit>
</Validation>
</Field>
Has someone has a clue of what needs to be done or change in order to make it work?
Thanks in advance

Answer 1

I've just found that this is proposed: https://github.com/Megabit/Blazorise/issues/1792
So far there's a workaround but not very nice:
<RichTextEdit #ref="richTextEditRef"
ConfigureQuillJsMethod="blazoriseDemo.configureQuillJs"
ContentChanged="#OnContentChanged"
Border="#( string.IsNullOrWhiteSpace( contentAsText ) ? Border.Danger : null)">
...
</RichTextEdit>
#if ( string.IsNullOrWhiteSpace( contentAsText ) )
{
<Paragraph TextColor="TextColor.Danger">Text is empty</Paragraph>
}
else
{
<Paragraph TextColor="TextColor.Success">Text is valid</Paragraph>
}
#code{
private string contentAsText;
public async Task OnContentChanged()
{
contentAsText = await richTextEditRef.GetTextAsync();
}
}