use state in class component code example

Example 1: use state in react js

import React, { useState } from 'react';

function Example() {
  // Declare a new state variable, which we'll call "count"  const [count, setCount] = useState(0);
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

Example 2: use state in className

Standard fair:

const [toggleClass, setToggleClass] = useState(false)

return <div className={toggleClass ? 'some-class' : ''} /> 
Using template literals:

const [toggleClass, setToggleClass] = useState(false)

return <div className={`some-class ${toggleClass ? 'some-class' :''}`} />