REACT USESTATE HOOK:

The React useState Hook allows us to track state in a function component.
State generally refers to data or properties that need to be tracking in an application.

Import useState:

To use the useState Hook, we first need to import it into our component.

import { useState } from "react";

Intialize the useState:

We initialize our state by calling useState in our function component.

useState accepts an initial state and returns two values:

The current state.
A function that updates the state.

Example:

import { useState } from "react";

function FavoriteColor() {
  const [color, setColor] = useState("");
}

The first value, color, is our current state.
The second value, ,setColor is the function that is used to update our state.
Lastly, we set the initial state to an empty string: useState("")

Read State:

Example:

import { useState } from "react";
import ReactDOM from "react-dom/client";

function FavoriteColor() {
  const [color, setColor] = useState("red");

  return <h1>My favorite color is {color}!</h1>
}

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<FavoriteColor />);

Output:
My favorite color is red!

Update State:

To update our state, we use our state updater function.
Example:

import { useState } from "react";
import ReactDOM from "react-dom/client";

function FavoriteColor() {
  const [color, setColor] = useState("red");

  return (
    <>
      <h1>My favorite color is {color}!</h1>
      <button
        type="button"
        onClick={() => setColor("blue")}
      >Blue</button>
    </>
  )
}

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<FavoriteColor />);

Output:
My favorite color is red!