fetch和axios区别，摘自Stack Overflow网站答案

fetch 请求
let url = 'https://someurl.com';
let options = {
            method: 'POST',
            mode: 'cors',
            headers: {
                'Accept': 'application/json',
                'Content-Type': 'application/json;charset=UTF-8'
            },
            body: JSON.stringify({
                property_one: value_one,
                property_two: value_two
            })
        };
let response = await fetch(url, options);
let responseOK = response && response.ok;
if (responseOK) {
    let data = await response.json();
    // do something with data
}

　　

axios请求示例

let url = 'https://someurl.com';
let options = {
            method: 'POST',
            url: url,
            headers: {
                'Accept': 'application/json',
                'Content-Type': 'application/json;charset=UTF-8'
            },
            data: {
                property_one: value_one,
                property_two: value_two
            }
        };
let response = await axios(options);
let responseOK = response && response.status === 200 && response.statusText === 'OK';
if (responseOK) {
    let data = await response.data;
    // do something with data
}

　　原答案：

• Fetch's body = Axios' data
• Fetch's body has to be stringified, Axios' data contains the object
• Fetch has no url in request object, Axios has url in request object
• Fetch request function includes the url as parameter, Axios request function does not include the url as parameter.
• Fetch request is ok when response object contains the ok property, Axios request is ok when status is 200 and statusText is 'OK'
• To get the json object response: in fetch call the json() function on the response object, in Axios get data property of the response object.

自己理解答案：

　　fetch 中的body是axios的data项

　　fetch的请求体必须是字符串，axios是对象

　　fetch请求对象不包含URL，axios请求对象包含url

　　fetch方法包含url作为参数，axios不用；

　　当接收到一个代表错误的 HTTP 状态码时，从 fetch()返回的 Promise 不会被标记为 reject， 即使该 HTTP 响应的状态码是 404 或 500。相反，它会将 Promise 状态标记为 resolve （但是会将 resolve 的返回值的 ok 属性设置为 false ）， 仅当网络故障时或请求被阻止时，才会标记为 reject。