如何访问 Promise 对象？ [复制]

Question

我的这段代码返回了我在浏览器中看到的 Promise

    const data2 = fetchCurrentWeatherID({
    params: {id: data.id - 3204, appid: 'ebc8de08ce3579cf444b51c12772a8bc'},
  })

  console.log(data2)

浏览器中的结果是：

↓Promise {<pending>}
 →[[Prototype]]: Promise
  [[PromiseState]]: "rejected"
 →[[PromiseResult]]: Error: Request failed with status code 404 at createError (http://localhost:3000/vendors~main.8c0082efa14d3f9d53ec.hot-update.js:767:15) at settle (http://localhost:3000/vendors~main.8c0082efa14d3f9d53ec.hot-update.

如果 Promise 被解决，结果是：

↓Promise {<pending>}
 →[[Prototype]]: Promise
  [[PromiseState]]: "fulfilled"
 →[[PromiseResult]]: Object

我想访问 PromiseState 和 PromiseResult！我已经用 React.js 进行了这个 API 调用

Answer 1

const data2 = fetchCurrentWeatherID({
  params: {id: data.id - 3204, appid: 'ebc8de08ce3579cf444b51c12772a8bc'},
})

console.log(data2);
data2
  .then(result => console.log(result))  // the resolved data result
  .catch(err => console.log('something went wrong, error was', err)); // any errors