Javascript

react

Normal function

function logRandom() {
    console.log(Math.random());
}

function Button() {

 const [count, setCounter] = useState(0);
 return <button onClick={logRandom}>{counter}</button>;
}

inline function

function Button() {

 const [count, setCounter] = useState(0);
 return <button onClick={

  function logRandom() {
      console.log(Math.random());
  }

 }>{counter}</button>;
}

inline arrow function definition

function Button() {

 const [count, setCounter] = useState(0);
 return <button onClick={() = > console.log(Math.random())}>{counter}</button>;
}