如何从promise返回值并在另一个方法中使用它？

async function method1() {
  return new Promise((resolve, reject) => {
    resolve('Hello');
  });
}

async function method2() {
  const result = await method1();
  console.log(result); // 输出 'Hello'
}

method2();

function method1() {
  return new Promise((resolve, reject) => {
    resolve('Hello');
  });
}

function method2() {
  method1().then((result) => {
    console.log(result); // 输出 'Hello'
  });
}

method2();

function method1() {
  return new Promise((resolve, reject) => {
    resolve('Hello');
  });
}

function method2() {
  method1().then((result) => {
    console.log(result); // 输出 'Hello'
    return 'World';
  }).then((result) => {
    console.log(result); // 输出 'World'
  });
}

method2();