访问数组内的对象-Javascript [英] Access object inside an array - Javascript

问题描述

这是我的回复正文. 它存储在变量中，当我使用 console.log(body)我得到以下内容.

This is how my response body looks like. Its stored in a variable and when i use console.log(body) I get the following.

[
   {
      "key1":"value1",
      "key2":"value2",
      "key3":"value3"
   }
]

我正在尝试使用以下

console.log(body[0].key3) 

我不确定.我不确定这里出什么问题了.如果我只是做

I get undefined. Im not sure what is wrong here. If i just do

console.log(body[0])

我正在获取字符串[

感谢您的帮助.

推荐答案

问题已解决

您的JS正在查看特定字符上的属性:

The Problem Explained

Your JS is looking at the property on a specific character:

看看下面的示例，该示例将有助于演示正在发生的事情:

Take a look at the following example that will help demonstrate what is going on:

const string = 'Hello';
console.log(string[0] === 'H'); // true
console.log('H'.key3 === undefined); // true

您需要JSON.parse字符串:

const body = `
[
   {
      "key1":"value1",
      "key2":"value2",
      "key3":"value3"
   }
]
`;

const parsed = JSON.parse(body);
console.log(parsed[0].key3);

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