Using the useState hook to manage state in functional components
The useState hook in React is a way to manage state within functional components. It allows you to declare state variables and update their values in response to interactions or dynamic changes within the application.
In React, when updating a component's state, the view is re-rendered to reflect the changes. This behavior is crucial for building dynamic and reactive interfaces.
Synopsis:
The useState hook allows you to add state to functional components. Through this hook, we can create variables that change over time and update the view when they are modified.
- 1. Declaring a state:
We use `useState` to declare a state variable and its function to update it.
- 2. Updating the state:
We can update the state by calling the `setState` or `setCount` function, depending on the name we give it.
- 3. Using state in JSX:
The state value can be used in JSX to render dynamic content.
Purpose:
- Allow components to manage their own state without the need for classes.
- Make interfaces dynamic and responsive to user interactions.
- Create more interactive and modern applications.
Exercises
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