一张图看懂 axios

HEAD

respoonse interceptor 1

auth

config

settle

data  transform

request.onreadystatechangerequest.onabortrequest.onerrorrequest.ontimeout request.addEventListener('progress')

dispatchRequest 

response

XHR

request.send

create transport request

buildURL

axios（扩展静态方法）

axios.create = function () {}

new Axios(instanceConfig)

request.Authorization

request interceptor 1

PATCH

axios.Cancelaxios.CancelTokenaxios.isCancel

Node

POST

request interceptor 2

PUT

adapter 请求适配器

GET

options

req.on('data')req.on('error')req.on('end')

构建 Promise Chain

axios.all = function () {}

DELETE

new XMLHttpRequest

request.open

axios.spread = function () {}

request interceptor 3

Axios.prototype.request

Axios

proxy

handle response

respoonse interceptor 2

is Form Data

OPTION

添加默认值Axios.defaults = instanceConfig

req.send

const axios = createInstance()