javascript - Node.JS:从 JSON 对象请求键值对

Question

API_URL 显示如下内容:

{
    "posts": [{
        "id": "987f2bhfzu3r3f43fg",
        "uuid": "g3g4g-4g34gd7f-40ae-96g43g82-65g34g43ccec94a566",
        "title": "This is my title",
        "tag": "thistag"
    }]
}

const request = require('request');


request('API_URL', { json: true }, (err, res, body) => {
  if (err) { return console.log(err); }
  console.log(body.posts);

});

返回我

[{
    "id": "987f2bhfzu3r3f43fg",
    "uuid": "g3g4g-4g34gd7f-40ae-96g43g82-65g34g43ccec94a566",
    "title": "This is my title",
    "tag": "thistag"
}]

如果我在我的代码中尝试 console.log(body.posts.title); 它返回

undefined

我从谁那里得到title的键值？

Answer 1

注意方括号 ([]) - 您有一个包含单个元素的数组。您首先需要为该元素下标，然后才访问该字段:

console.log(body.posts[0].title)
// Here --------------^