Is there a way to specify an extra class for a post or page with no title?

To add an extra class when there is no title

<h1<?php if(!get_the_title()){echo ' class="no-title"';}?>><?php the_title();?></h1>

Or to only display h1 tags when there is a title

<?php if(get_the_title()) { ?>
    <h1><?php the_title();?></h1>
<?php }?>