Call a function from input's onchange

Question

I'm using controller as syntax.

And when my file input changed, i want to trigger a function.

how to do that?

below is my code with $scope syntax

<input class="upload" type="file" accept="image/*" ng-model="image"
                onchange="angular.element(this).scope().uploadImage(this)">

Why not use `ng-change="yourController.yourFunction()"` ? – Matheno Jun 22 '16 at 11:42 — Matheno, Jun 22 '16 at 11:42
if type="file" ,ng-change can't be used. – Tran Thien Chien Jun 22 '16 at 11:46 — Tran Thien Chien, Jun 22 '16 at 11:46

score 6 · Answer 1 · edited May 23 '17 at 10:34

As found here, you could use a custom directive to listen for changes in your input file.

view.html:

<input type="file" custom-on-change="uploadFile">

controller.js:

app.controller('myCtrl', function($scope){
    $scope.uploadFile = function(event){
        var files = event.target.files;
    };
});

directive.js:

app.directive('customOnChange', function() {
  return {
    restrict: 'A',
    link: function (scope, element, attrs) {
      var onChangeHandler = scope.$eval(attrs.customOnChange);
      element.bind('change', onChangeHandler);
    }
  };
});

View JSFIDDLE

score 3 · Answer 2 · answered Jun 22 '16 at 11:45

3

you can use ng-change="nameOfFunction()" this will trigger when this input change

Or use HERE

answered Jun 22 '16 at 11:45

abdoutelb

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I dont think `ng-change` works in `` according to this: https://github.com/angular/angular.js/issues/1375 (I didnt test...). However `angular-file-upload` is indeed a possible solution. – pgrodrigues Jun 22 '16 at 11:58

score 2 · Answer 3 · answered Jun 22 '16 at 11:39

Use angular scope.$watch. In your controller, add this:

scope.$watch("image", function(newValue, oldValue) {
   // Do anything you want here
   scope.uploadImage(newValue);
}

More information about scope.$watch: https://docs.angularjs.org/api/ng/type/$rootScope.Scope

Call a function from input's onchange

3 Answers3

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