yarn install
yarn ios
First, run the app, and press in/out on the shape. Notice that the opacity changes when it's pressed vs not. All good.
Next, try adding / removing the extraState prop from Shape. Then save.
Now try pressing in/out on the shape again. It doesn't work.
Here's a video explanation: https://www.loom.com/share/91bc5f2a6d074d209149e2531d9ff8f3