Hooks are the modern standard for managing state and lifecycle in React.
1The Evolution of React
Before hooks, components that needed state had to be classes. This led to 'wrapper hell' and complex lifecycle logic spread across multiple methods. Hooks allow you to extract stateful logic from a component so it can be tested independently and reused. This transition from 'Class Lifecycle' to 'Functional Effects' is the core of modern React development.
2The Golden Rules
React relies on the order in which Hooks are called. If you put a hook inside a condition, that order could change between renders, breaking React's ability to track which state belongs to which hook. This is why the 'Top Level' rule is absolute. By following the rules of hooks, you ensure your application remains stable and free of mysterious state bugs.
