Creates an Context object. When React renders a component that subscribes to this Context object it will read the current context value from the closest matching `Provider` above it in the tree.
Creates a Context object. When React renders a component that subscribes to this Context object it will read the current context value from the closest matching `Provider` above it in the tree.
The `defaultValue` argument is **only** used when a component does not have a matching Provider above it in the tree. This can be helpful for testing components in isolation without wrapping them. Note: passing `undefined` as a Provider value does not cause consuming components to use `defaultValue`.