Specified comment length

Hi. This plugin doesn’t support setting a maximum comment length, but that’s a good idea. I’ll look into adding it.

Thank You for considering this…

I think it makes more sense to be able to limit comment character length.

I found this code to limit the character length, it works , but I dont know how to add the modal box, that appear automatically when comment is more that 300 characters. I mean the modal box effect your short comment filter have.

add_filter( 'preprocess_comment', 'maximum_comment_length' );

function maximum_comment_length( $commentdata ) {
	$maximumCommentLength = 300;

	if ( strlen( trim( $commentdata['comment_content'] ) ) > $maximumCommentLength )
        {
		wp_die( 'Sorry your comment is more than ' . $maximumCommentLength . ' characters long on this Site.' );
       }
	return $commentdata;
}

Please I do really need help.