尝试使用fetch访问响应数据 [英] Trying to access response data using fetch

问题描述

我正在尝试一些简单的方法，我使用fetch API从我的应用程序的前端发出请求，如此

I'm trying something simple where I make a request from the front end of my app using the fetch API like so

let request = new Request('http://localhost:3000/add', {
    headers: new Headers({
        'Content-Type': 'text/json' 
    }),
    method: 'GET'
});

fetch(request).then((response) => {
    console.log(response);
});

我在服务器上处理此请求，如此，

I am handling this request on the server like so,

app.get('/add', (req, res) => {
    const data = {
        "number1": "2", 
        "number2": "4"
    };
    res.send(data);
});

然而，当我尝试在前端console.log（响应）上访问我的数据时，我获取以下对象

However, when I try to access my data on the front end console.log(response), I get the following object

Response {type: "basic", url: "http://localhost:3000/add", redirected: false, status: 200, ok: true…}
body:(...)
bodyUsed:false
headers:Headers
ok:true
redirected:false
status:200
statusText:"OK"
type:"basic"
url:"http://localhost:3000/add"
__proto__:Response

响应正文为空。我认为这是数据出现的地方？如何有效地从服务器传递数据？

The response body is empty. I assumed that's where the data would show up? How do I pass data effectively from the server?

推荐答案

好的，这适用于我的前端

Okay, this works on my front end

fetch(request).then((response) => {
    console.log(response);
    response.json().then((data) => {
        console.log(data);
    });
});

关键部分是承诺链的解决方案。

The key part was the resolution of the promise chain.

此处类似的问题 JavaScript fetch API - 为什么response.json（）返回一个promise对象（而不是JSON）？

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