if else jQuery не работает

$('.language__link').on('mousemove', function(e) { 
  leftZ = 0; 
  leftP = "50%"; 
  if (this.style.left != 0 && this.style.left != '0px') { 
    $(this).css({ 
      'position': 'absolute', 
      'left': leftZ 
    }); 
  } else { 
    $(this).css({ 
      'position': 'absolute', 
      'left': leftP 
    }); 
  } 
 
});

.language__link { 
  width: 200px; 
  padding: 25px; 
  border: 1px solid #000000; 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> 
<div class="language__link"> 
  Text 
</div>