Помогите с анимацией scale

$('button').click(function() { 
  $('div').addClass('anim-scale'); 
})

div { 
  transform: scale(0); 
  width: 150px; 
  height: 150px; 
  border-radius: 50%; 
  background-color: tomato; 
  transition: 2s linear; 
} 
div.anim-scale { 
  transform: scale(1); 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> 
<button>Button</button> 
<div></div>

$('button').click(function() { 
  $({scale: 0}).animate({scale: 1}, { 
    duration: 1000, // скорость 
    easing: 'linear', 
    step: function(scale) { 
      $('div').css('transform', 'scale('+scale+')') 
    } 
  }); 
})

div { 
  transform: scale(0); 
  width: 150px; 
  height: 150px; 
  border-radius: 50%; 
  background-color: tomato; 
  transition: 2s linear; 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<button>Нажми</button> 
<div></div>