angularjs点击图片放大实现上传图片预览

/*图片点击放大再点击还原*/ 
angular.module('routerModule').directive('enlargePic',function(){//<span style="font-family: Arial, Helvetica, sans-serif;">enlargePic指令名称，写在需要用到的地方img中即可实现放大图片</span> 
 return{ 
  restrict: "AE", 
  link: function(scope,elem){ 
   elem.bind('click',function($event){ 
    var img = $event.srcElement || $event.target; 
    angular.element(document.querySelector(".mask"))[0].style.display = "block"; 
    angular.element(document.querySelector(".bigPic"))[0].src = img.src; 
   }) 
  } 
 } 
}) 
.directive('closePic',function(){ 
 return{ 
  restrict: "AE", 
  link: function(scope,elem){ 
   elem.bind('click',function($event){ 
    angular.element(document.querySelector(".mask"))[0].style.display = "none"; 
   }) 
  } 
 } 
});