State: How to Manage State with useState
In React, states (state) are fundamental for managing data that changes over time, such as user interaction. With useState, we can declare state variables within functional components and update their values.
Synopsis:
The useState hook allows us to add state to functional components. Through this hook, we can create variables that change over time and update the view when 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 the 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 reactive to user interactions.
- Create more interactive and modern applications.
Exercises
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