在Firefox中不起作用的角度事件

Question

我有一個角度函數，允許將文本文件放入文本區域，並將內容放入文本框中。問題是這在Firefox中不起作用。有任何想法嗎？

PLunkr

var app = angular.module('plunker', []); 
app.controller('MainCtrl', function($scope) { 
    $scope.text = ""; 
}) 
.directive('plkrFileDropZone', [function() { 
     return { 
      restrict: 'EA', 
      scope: {content:'='}, 
      link: function (scope, element, attrs) { 

     scope.content = "drop a .txt file here"; 

       var processDragOverOrEnter; 

       processDragOverOrEnter = function (event) { 
        if (event !== null) { 
         event.preventDefault(); 
        } 
        event.dataTransfer.effectAllowed = 'copy'; 
        return false; 
       }; 

       element.bind('dragover', processDragOverOrEnter); 
       element.bind('dragenter', processDragOverOrEnter); 
       element.bind('drop', handleDropEvent); 

     function insertText(loadedFile) { 

       scope.content = loadedFile.target.result; 
      scope.$apply(); 
     } 

       function handleDropEvent(event) { 

        if (event !== null) { 
         event.preventDefault(); 
        } 
        var reader = new FileReader(); 
        reader.onload = insertText; 
        reader.readAsText(event.dataTransfer.files[0]); 

       } 
      } 
     }; 
    }]); 

Answer 1

有一個簡單的解決方案刪除行

event.dataTransfer.effectAllowed = 'copy';