qjquery this code example

Example 1: @reach/router

render(
  <Router>
    <Home path="/" />
    <Invoice path=":invoiceId" />
    <InvoiceList path="invoices" />
  </Router>
)

Example 2: reawct uweeffect

import React, { useState, useEffect } from 'react';

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

  // Similar to componentDidMount and componentDidUpdate:
  useEffect(() => {
    // Update the document title using the browser API
    document.title = `You clicked ${count} times`;
  });

  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}