版本说明：

{
  "name": "wx_vue_3.0",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build"
  },
  "dependencies": {
    "axios": "^0.27.2",
    "core-js": "^3.8.3",
    "vant": "^3.6.4",
    "vue": "^3.2.13",
    "vue-router": "^4.0.3",
    "vuex": "^4.0.0",
    "weixin-js-sdk": "^1.6.0"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "~5.0.0",
    "@vue/cli-plugin-router": "~5.0.0",
    "@vue/cli-plugin-vuex": "~5.0.0",
    "@vue/cli-service": "~5.0.0"
  }
}

仅简单配置Axios后引入使用，返回“参数错误”。并不是参数错误，而是后端接收不到参数。仔细看文档

 Axios中文文档

GET参数{params:{参数名:值}} 即{params:{paramName:paramValue}}

const getContent = () => {
  let params = {
    course_id:proxy.$route.params.course_id
  }
  let param = {
    course_id:proxy.$route.params.course_id
  }
  //proxy.$milliaAxios.get(baseUrl, {params}).then(response => {
  //proxy.$milliaAxios.get(baseUrl, {params:param}).then(response => {
  proxy.$milliaAxios.get(baseUrl, {params: {course_id:proxy.$route.params.course_id}}).then(response => {
    console.log(response.data)
  })
}
//axois.get(地址,{params}).then(response=>{})  
//注：params实际为params:{course_id:proxy.$route.params.course_id}

 POST参数 {参数名:值}即{paramName:paramValue}

const goTag = () => {
  let params = {
    activeId:store.state.activityID
  }
  proxy.$milliaAxios.post(baseUrl,param).then(response => {
    console.log(response.data)
}
//axois.post(地址,params).then(response=>{})  
//注：params实际为{activeId:store.state.activityID}