AngularJs Component doesn't update view after img loading - angularjs

Question

i'm using angularJs 1.7 components.
This is my component who uploads a picture then converts it to base 64, then it is supposed to display it, but the displaying doesnt work .
myApp.component('club', {
templateUrl: 'vues/club.html',
controller: function($log,$scope) {
// HTML form data, 2 way binding ..
this.club = {};
// Bse 64 encoder
encodeImageFileAsURL = function() {
var filesSelected = document.getElementById("inputFileToLoad").files;
if (filesSelected.length > 0) {
var fileToLoad = filesSelected[0];
var fileReader = new FileReader();
fileReader.onload = function(fileLoadedEvent) {
var srcData = fileLoadedEvent.target.result; // <--- data: convert base64 : OK
this.club.img = srcData ; // Displaying in view doesnt work
}
fileReader.readAsDataURL(fileToLoad);
}
}
// Jquery watcher when we upload a picture
$(document).on('change', 'input[type="file"]' , function(){
encodeImageFileAsURL();
});
This is the html button inside the template :
<div id="upload_button">
<label>
<input name="inputFileToLoad" id="inputFileToLoad" ng-model="logo" type="file" onchange="" /> </input>
<span class="btn btn-primary">Upload picture</span>
</label>
</div>
This is the error :
TypeError: this.club is undefined
srcData is ok, and holds a base 64 image, the function works well.
I've tried the solution provided (.bind(this)) there with no luck , i dont know where to place it:
How to access the correct `this` inside a callback?
When using the $scope syntax, it is working, adding $scope.$apply(), but now i'm using components based dev, and the .this syntax, it doesnt work any more .
EDIT 1 :
Ok, i've initialized club with
$scope.club = {} ;
then inside the function, i'm writing
$scope.club.img = srcData ;
Then, it is working ok. I dont understand why .this is not the same than $scope !

Answer 1

See following example for where this object has reference to
a={
firstname:"something",
lastname:"something2",
fullname:function(){
console.log(this.firstname+' '+this.lastname);
}
}
a.fullname();
In above example Object a is created and inside fullname() function this object pointing to 'a' Object.
So that in your case
templateUrl is only variable on this Object if you do not want to use $scope. You can declare it by using var club = {}