React question detail
State
- Definition: State is a data structure that is managed within a component. It represents information that can change over the lifetime of the component.
- Mutability:
State is mutable, meaning it can be changed using the setter function (
setStatein class components or the updater function fromuseStatein functional components). - Scope: State is local to the component where it is defined. Only that component can modify its own state.
- Usage: State is typically used for data that needs to change in response to user actions, network responses, or other dynamic events.
- Re-rendering: Updating the state triggers a re-render of the component and its descendants.