JAVASCRIPT

Toggle on button click in react js functional component

const [show,setShow]=useState(true)
  return (
    <div className="App">
     {
       show?<h1>Hello World !</h1>:null
     }
<button onClick={()=>setShow(!show)} >Toggle</button> 
    </div>
  );

onclick toggle class react

import React, { useState } from "react";import "./styles.css";

export default function App() {
  const [isActive, setActive] = useState("false");
  const handleToggle = () => {
    setActive(!isActive);  };
  return (
    <div className={isActive ? "app" : null}>      <h1>Hello react</h1>
      <button onClick={handleToggle}>Toggle class</button>    </div>
  );
}