Javascript/Node.js -如何正确等待异步函数返回值

function asyncFunction(callback) {
  // 异步操作
  setTimeout(function() {
    const result = '异步函数返回值';
    callback(result);
  }, 1000);
}

asyncFunction(function(result) {
  console.log(result);
});

function asyncFunction() {
  return new Promise(function(resolve, reject) {
    // 异步操作
    setTimeout(function() {
      const result = '异步函数返回值';
      resolve(result);
    }, 1000);
  });
}

asyncFunction().then(function(result) {
  console.log(result);
});

async function asyncFunction() {
  return new Promise(function(resolve, reject) {
    // 异步操作
    setTimeout(function() {
      const result = '异步函数返回值';
      resolve(result);
    }, 1000);
  });
}

(async function() {
  const result = await asyncFunction();
  console.log(result);
})();