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Janic Duplessis
cf02bd9b76
Summary:
When passing an object to contentOffset that doesn't have `y` prop set it causes the following error:
```
Error: AnimatedValue: Attempting to set value to undefined
This error is located at:
in ScrollView (at src/index.js:638)
...
```
This happens since a runtime check was added to the `AnimatedValue` constructor. (a3aaa471ec)
According to flow types the object passed to contentOffset should always contain both x and y props but since it worked before when y is undefined I think its fine to patch the runtime behaviour defensively, especially since the code change is simple.
## Changelog
[General] [Fixed] - Fix Animated Value initialized with undefined in ScrollView
Pull Request resolved: https://github.com/facebook/react-native/pull/28349
Test Plan: Tested that the crash no longer reproduces when passing an empty object to contentOffset.
Reviewed By: cpojer
Differential Revision: D20601664
Pulled By: hramos
fbshipit-source-id: b098a2dd1e702f995a9a92fa6e4e9a204187dac4