angularjs upload file with a single upload button

Question

I would like to know how can I upload files using angularjs without using external library and just a single upload button? I have searched for the solution for a while and found a solution is pretty close to what I want as below:

<div ng-controller = "myCtrl">
    <input type="file" file-model="myFile"/>
    <button ng-click="uploadFile()">upload me</button>
</div>

var myApp = angular.module('myApp', []);

myApp.directive('fileModel', ['$parse', function ($parse) {
    return {
        restrict: 'A',
        link: function(scope, element, attrs) {
            var model = $parse(attrs.fileModel);
            var modelSetter = model.assign;

            element.bind('change', function(){
                scope.$apply(function(){
                    modelSetter(scope, element[0].files[0]);
                });
            });
        }
    };
}]);

myApp.service('fileUpload', ['$http', function ($http) {
    this.uploadFileToUrl = function(file, uploadUrl){
        var fd = new FormData();
        fd.append('file', file);
        $http.post(uploadUrl, fd, {
            transformRequest: angular.identity,
            headers: {'Content-Type': undefined}
        })
        .success(function(){
        })
        .error(function(){
        });
    }
}]);

myApp.controller('myCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){

    $scope.uploadFile = function(){
        var file = $scope.myFile;
        console.log('file is ' );
        console.dir(file);
        var uploadUrl = "/fileUpload";
        fileUpload.uploadFileToUrl(file, uploadUrl);
    };

}]);

http://jsfiddle.net/JeJenny/ZG9re/

However, I want only a upload button and in the above case, how can I trigger uploadFile()?

Aayushi Jain · Accepted Answer · 2017-06-19 04:23:43Z

1

Updated your fiddle: http://jsfiddle.net/ZG9re/7080/

HTML

<div ng-controller = "myCtrl">    
    <button>
    <input type="file" class="input" id="myfile" file-model="myFile"><a href="">Upload Me</a>
    </button>    
</div>

CSS

#myfile {
  opacity: 0;
  position: absolute;
}

So that now when you click on "Upload Me" you will get the file explorer.

Update

Please check: http://jsfiddle.net/ZG9re/7081/

edited Jun 19, 2017 at 4:23

answered Jun 19, 2017 at 3:39

Aayushi Jain

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18 Comments

bunny Over a year ago

I am new to angularjs. I would like to know what the below two lines mean? Thanks! document.getElementById("test").classList.remove("open");

Aayushi Jain Over a year ago

I am sorry here is the updated code: jsfiddle.net/ZG9re/7081 I added that as I was testing something, you don't need that to run your code, you can remove that piece of code

Aayushi Jain Over a year ago

So you don't need any change in your JavaScript, just the HTML and CSS needs to change

Aayushi Jain Over a year ago

Yes you can, as I said there is no change in your JavaScript, just the HTML and CSS need to change as posted in answer :) like this: jsfiddle.net/ZG9re/7082

Aayushi Jain Over a year ago

That you have to trigger in link function when the binding has some change, like this: jsfiddle.net/ZG9re/7083

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