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Could you please explain why method 1 (binding to property) does not work, while method 2 (binding to function return value) does?

Including relevant code here. Please post a comment if you require any additional code.

function MyController(myService) {
    // Method 1: A property
    this.backgroundImagePath = login.backgroundImagePath;

    // Method 2: A function
    this.getBackgroundImagePath = function () {
        return login.backgroundImagePath;
    };
}

Then in my HTML code, I have:

<!-- Does not work -->
<img data-ng-src="{{ myController.backgroundImagePath }}" />

<!-- Works as expected -->
<img data-ng-src="{{ myController.getBackgroundImagePath() }}" />
Improve this question
7
  • The error must be somewhere else, since both methods work in this Plunker. Can you add your own Plunker? Commented Sep 29, 2015 at 13:24
  • Because of time. The value of login.backgroundImagePath is not the same when it's read. Commented Sep 29, 2015 at 13:25
  • @zeroflagL: Thanks! So I understand that when login.backgroundImagePath is initially read, that it will not have the updated value. However, is there a way to have the value updated whenever login.backgroundImagePath changes? Or are functions the correct way to handle this Commented Sep 29, 2015 at 13:33
  • Just found this SO answer, that should help! :) Commented Sep 29, 2015 at 13:37
  • You can add a watcher for login.backgroundImagePath. You can also define a getter, which basically works like getBackgroundImagePath in the background, but login.backgroundImagePath is still a property. Commented Sep 29, 2015 at 13:38
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