didUpdateAttrs not called on array modifications

1

In the guide, it is said the didUpdateAttrs will be called when there is a change in the attributes used by the template.

But the hook is not called while an object is added or removed from an array.

Here is a twiddle stating it.

Correct me if I got anything wrong.

2

Nope. Expected behavior.

3

I brought this up on Slack not long ago, and as Gaurav0 mentions, it’s expected behavior. Here is my Twiddle about the issue but with Objects. Solution is to call .notifyPropertyChange()

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4

Is that mean you called notifyPropertyChange() in Component class or other way ? then how didUpdateAttrs() works ?

5

The other way around. Calling it outside the Component will then trigger the hook.

6

You can make use of [arrayContentDidChange] (MutableArray - 4.6 - Ember API Documentation) to keep track of the added and removed objects/primitive