解决React报错Expected `onClick` listener to be a function_React

// App.js
const App = () => {
  // ⛔️ Warning: Expected `onClick` listener to be a function
  // instead got a value of `string` type.
  return (
    <div>
      <button onClick="console.log('Click')">Click</button>
    </div>
  );
};
export default App;

// App.js
const App = () => {
  const handleClick = () => {
    console.log('button clicked');
  };
  return (
    <div>
      <button onClick={handleClick}>Click</button>
    </div>
  );
};
export default App;

// App.js
import {useState} from 'react';
const App = () => {
  const [count, setCount] = useState(0);
  const handleClick = (event, num) => {
    console.log(event.target);
    console.log('button clicked');
    setCount(count + num);
  };
  return (
    <div>
      <h2>{count}</h2>
      <button onClick={event => handleClick(event, 100)}>Click</button>
    </div>
  );
};
export default App;