Vue3——基础安装以及配置

目录

关于Vue3里面的getCurrentInstance

使用组合式Api

---

安装vue-cli，选择vue3

vue create Vue3

使用vue ui安装router，axios，vuex

安装完axios后可能会出现终端警告，这时配置以下代码即可运行

main.js

import axios from './plugins/axios' 
import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'

createApp(App).use(store).use(router).use(router).use(axios).mount('#app')

axios.js

"use strict";

import axios from "axios";

// Full config:  https://github.com/axios/axios#request-config
// axios.defaults.baseURL = process.env.baseURL || process.env.apiUrl || '';
// axios.defaults.headers.common['Authorization'] = AUTH_TOKEN;
// axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded';

let config = {
  baseURL: '路径'
  // timeout: 60 * 1000, // Timeout
  // withCredentials: true, // Check cross-site Access-Control
};

const _axios = axios.create(config);

_axios.interceptors.request.use(
  function(config) {
    // Do something before request is sent
    return config;
  },
  function(error) {
    // Do something with request error
    return Promise.reject(error);
  }
);

// Add a response interceptor
_axios.interceptors.response.use(
  function(response) {
    // Do something with response data
    return response;
  },
  function(error) {
    // Do something with response error
    return Promise.reject(error);
  }
);
export default{
  install:function(app){
    app.config.globalProperties.axios = _axios;
    app.config.globalProperties.$translate = (key) =>{
      return key
    }
  }
}
/* Plugin.install = function(Vue) {
  Vue.axios = _axios;
  window.axios = _axios;
  Object.defineProperties(Vue.prototype, {
    axios: {
      get() {
        return _axios;
      }
    },
    $axios: {
      get() {
        return _axios;
      }
    },
  });
};

Vue.use(Plugin)

export default Plugin; */

 替换以下代码：

export default{
  install:function(app){
    app.config.globalProperties.axios = _axios;
    app.config.globalProperties.$translate = (key) =>{
      return key
    }
  }
}

写好后在组件中引入Proxy，这里在HomeView.vue页面中引入

关于Vue3里面的getCurrentInstance

可以获取挂载在全局的属性和获取上下文

打印结果如下：

第二种请求方式：

使用组合式Api

import { getCurrentInstance, onMounted } from "vue";  
setup() {
    onMounted(() => {
      const { proxy } = getCurrentInstance();
      console.log(proxy);
      proxy.axios.get("/home/multidata").then((e) => {
        console.log(e);
      });
    });
  },