// 配置API接口地址
var root = 'https://cnodejs.org/api/v1'
// 引用axios
var axios = require('axios')
// 自定義判斷元素類型JS
function toType (obj) {
 return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
}
// 參數(shù)過濾函數(shù)
function filterNull (o) {
 for (var key in o) {
  if (o[key] === null) {
   delete o[key]
  }
  if (toType(o[key]) === 'string') {
   o[key] = o[key].trim()
  } else if (toType(o[key]) === 'object') {
   o[key] = filterNull(o[key])
  } else if (toType(o[key]) === 'array') {
   o[key] = filterNull(o[key])
  }
 }
 return o
}
/*
 接口處理函數(shù)
 這個函數(shù)每個項(xiàng)目都是不一樣的，我現(xiàn)在調(diào)整的是適用于
 https://cnodejs.org/api/v1 的接口，如果是其他接口
 需要根據(jù)接口的參數(shù)進(jìn)行調(diào)整。參考說明文檔地址：
 https://cnodejs.org/topic/5378720ed6e2d16149fa16bd
 主要是，不同的接口的成功標(biāo)識和失敗提示是不一致的。
 另外，不同的項(xiàng)目的處理方法也是不一致的，這里出錯就是簡單的alert
*/
function apiAxios (method, url, params, success, failure) {
 if (params) {
  params = filterNull(params)
 }
 axios({
  method: method,
  url: url,
  data: method === 'POST' || method === 'PUT' ? params : null,
  params: method === 'GET' || method === 'DELETE' ? params : null,
  baseURL: root,
  withCredentials: false
 })
 .then(function (res) {
 if (res.data.success === true) {
  if (success) {
   success(res.data)
  }
 } else {
  if (failure) {
   failure(res.data)
  } else {
   window.alert('error: ' + JSON.stringify(res.data))
  }
 }
 })
 .catch(function (err) {
  let res = err.response
  if (err) {
   window.alert('api error, HTTP CODE: ' + res.status)
  }
 })
}
// 返回在vue模板中的調(diào)用接口
export default {
 get: function (url, params, success, failure) {
  return apiAxios('GET', url, params, success, failure)
 },
 post: function (url, params, success, failure) {
  return apiAxios('POST', url, params, success, failure)
 },
 put: function (url, params, success, failure) {
  return apiAxios('PUT', url, params, success, failure)
 },
 delete: function (url, params, success, failure) {
  return apiAxios('DELETE', url, params, success, failure)
 }
}

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
Vue.config.productionTip = false
/* eslint-disable no-new */
 new Vue({
 el: '#app',
 router,
 template: '<App/>',
 components: { App }
})

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
// 引用API文件
import api from './api/index.js'
// 將API方法綁定到全局
Vue.prototype.$api = api
Vue.config.productionTip = false
/* eslint-disable no-new */
new Vue({
 el: '#app',
 router,
 template: '<App/>',
 components: { App }
})

<template>
 <div>index page</div>
</template>
<script>
export default {
 created () {
  this.$api.get('topics', null, r => {
   console.log(r)
  })
 }
}
</script>