node.js回调获取变量的意外值

let myVar = 10;
setTimeout(() => {
  console.log(myVar); // 输出10
}, 1000);

let myVar = 10;
setTimeout(() => {
  console.log(myVar); // 输出10
}, 1000);

function createLogger(prefix) {
  let count = 0;

  return function(message) {
    count++;
    console.log(`[${prefix} #${count}] ${message}`);
  };
}

const infoLogger = createLogger("Info");
infoLogger("Hello, World!"); // 输出: [Info #1] Hello, World!

async function getData() {
  const response = await fetch("https://api.example.com/data");
  const data = await response.json();
  return data;
}

getData().then(data => {
  console.log(data);
});