AngularJs: How to check for changes in file input fields?

Question

I am new to angular. I am trying to read the uploaded file path from HTML \'file\' field whenever a \'change\' happens on this field. If i use \'onChange\' it works but when

Answer 1

Similar to some of the other good answers here, I wrote a directive to solve this problem, but this implementation more closely mirrors the angular way of attaching events.

You can use the directive like this:

HTML

As you can see, you can inject the files selected into your event handler, as you would inject an $event object into any ng event handler.

Javascript

angular
  .module('yourModule')
  .directive('fileChange', ['$parse', function($parse) {

    return {
      require: 'ngModel',
      restrict: 'A',
      link: function ($scope, element, attrs, ngModel) {

        // Get the function provided in the file-change attribute.
        // Note the attribute has become an angular expression,
        // which is what we are parsing. The provided handler is 
        // wrapped up in an outer function (attrHandler) - we'll 
        // call the provided event handler inside the handler()
        // function below.
        var attrHandler = $parse(attrs['fileChange']);

        // This is a wrapper handler which will be attached to the
        // HTML change event.
        var handler = function (e) {

          $scope.$apply(function () {

            // Execute the provided handler in the directive's scope.
            // The files variable will be available for consumption
            // by the event handler.
            attrHandler($scope, { $event: e, files: e.target.files });
          });
        };

        // Attach the handler to the HTML change event 
        element[0].addEventListener('change', handler, false);
      }
    };
  }]);