To access the state of a React component from within a member function, use
this.state in the function.
For example, within a class component, you can access the state using
this.state.propertyName to retrieve or modify the state values within the component's methods.
Best Practices and Pitfalls:
Avoid directly mutating state within member functions to maintain React's
immutability principles. Instead, use setState() to update state safely.
Pitfalls to avoid include directly modifying this.state, which can lead to unexpected
behavior, and relying on stale state due to asynchronous updates.