节点获取仅返回未决的承诺 [英] node-fetch only returning promise pending

问题描述

我正在尝试 node-fetch 而我得到的唯一结果是:

I am trying out node-fetch and the only result I am getting is:

Promise { ;}

我该如何解决这个问题，才能得到一个完整的promise?

How can I fix this so I get a completed promise?

代码:

var nf = require('node-fetch');

nf(url).then(function(u){console.log(u.json())})

推荐答案

你的代码的问题是 u.json() 返回了一个 promise

The problem with your code is that u.json() returns a promise

您还需要等待新的 Promise 解决:

You need to wait for that new Promise to resolve also:

var nf = require('node-fetch');

var url = 'https://api.github.com/emojis'

nf(url).then(
  function(u){ return u.json();}
).then(
  function(json){
    console.log(json);
  }
)

对于真实代码，您还应该添加 .catch 或 try/catch 以及一些 404/500 错误处理，因为除非发生网络错误，否则获取总是会成功.状态码 404 和 500 仍然成功解决

For real code you should also add a .catch or try/catch and some 404/500 error handling since fetch always succeeds unless a network error occurs. Status codes 404 and 500 still resolve with success

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