Value

Animated.Value is a container for storing values. It's is initialized with new Value(0) constructor. For backward compatibility there are provided API for setting value after it has been initialized:

const v = new Value(0);
/// ...
v.setValue(100);

While using Animated.Value in functional components it's recommended that one should wrap instantiation with useRef(...) or useMemo(...) to use the same instance on re-render, or just simply use useValue hook:

const v = useValue(0);
/// ...
v.setValue(100);