XF 2.1 <xf:editorrow>ok but maxlength="x" is not working

[Scandal]

I'm trying to integrate the xenforo rich editor on my addon's page. Something like:

<xf:editorrow name="comment" value="{$comment.message}" maxlength="10" />

But it seems that maxlength value has no affect on the code / editor. I can add as many characters as I want on the field.

Do I miss something?

 

[Scandal]

Any idea? Maybe needs something extra like *js?