Using State in React App – React Hook

State in React is used to store information, it is an object of a component. The state holds data that may change during the lifetime of a React component.

We can use state in React JS we can use as,

import React from "react";

 const state = React.useState();

or

import React, {useState} from "react";

 const state = useState();

React State Example Code

index.js

import React from "react";
import ReactDOM from "react-dom";
import App from "./components/App"

ReactDOM.render(
  <App/>,
  document.getElementById("root")
);

components/App.jsx

import React, {useState} from "react";

function App() {
  const [count, setCount] = useState(0);

  function increase(){
    setCount(count+1);
  }
  function decrease(){
    setCount(count-1);
  }
  return (
    <div className="container">
      <h1>{count}</h1>
      <button onClick={increase}>+</button>
      <button onClick={decrease}>-</button>
    </div>);
}

export default App;