module.exports = {
 /*
  ** Nuxt.js modules
  */
 modules: ["@nuxtjs/axios"],
 /*
  ** axios proxy
  */
 axios: {
  proxy: true
 },
 /*
  ** proxy
  */
 proxy: {
  "/api": "http://localhost:3000"
 },
 /*
  ** Build configuration
  ** See https://nuxtjs.org/api/configuration-build/
  */
 build: {
  vendor: ["axios"]
 }
}

// plugins/axios.js
export default function({ $axios, redirect }) {

 $axios.onResponse(res => {
  return res.data
 })

 $axios.onError(error => {
  const code = parseInt(error.response && error.response.status);
  if (code === 400) {
   redirect("/400");
  }
 });
}

module.exports = {
 /*
  ** Plugins to load before mounting the App
  ** https://nuxtjs.org/guide/plugins
  */
 plugins: ["@/plugins/axios"],
}

async asyncData({ $axios }) {
 const ip = await $axios.get('http://icanhazip.com')
 return { ip }
}

methods: {
 async fetchSomething() {
  const ip = await this.$axios.get('http://icanhazip.com')
  this.ip = ip
 }
}

npm i axios qs
npm i @nuxtjs/axios @nuxtjs/proxy --save-dev 

import qs from "qs";
 
export default function({ $axios, redirect }) {
 $axios.onRequest(config => {
  config.data = qs.stringify(config.data, {
   allowDots: true //Option allowDots can be used to enable dot notation
  });
  return config;
 });
 
 $axios.onResponse(response => {
  return Promise.resolve(response.data);
 });
 
 $axios.onError(error => {
  return Promise.reject(error);
 });
}

 plugins: [
  { src: "~plugins/axios.js", ssr: true },
 ],
 //处理跨域问题
 modules: ["@nuxtjs/axios", "@nuxtjs/proxy"],
 axios: {
  retry: { retries: 3 },
  //开发模式下开启debug
  debug: process.env._ENV == "production" "production"
    "http://localhost:3000/api"
    : "http://localhost:3000/api",
  withCredentials: true,
 },
 proxy: {
  //开启代理
  "/api/": {
   target: "http://192.168.1.2:10086/v1",
   pathRewrite: { "^/api/": "" }
  }
 }