vue.js - 在 vue3 项目中安装 element ui 插件的问题

Question

大家好，我在 Vue js 上安装插件时遇到问题，所以我尝试在我的项目上安装 Element Ui 插件，安装成功，但在我的 Vs Code 终端中它显示了这个:

Compiled with 1 warning
warning in ./src/plugins/element.js "export 'default' (imported as 'Vue') was not found in 'vue'

而且我无法在本地主机服务器上访问我的项目，它只是空白。

我的 Main.JS 文件

import App from "./App.vue";
import router from "./router";
import store from "./store";
import "./plugins/element.js";

createApp(App)
  .use(store)
  .use(router)
  .mount("#app");

打包.Json

  "name": "jargonapp",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint"
  },
  "dependencies": {
    "core-js": "^3.6.5",
    "element-ui": "^2.4.5",
    "vue": "^3.0.0",
    "vue-router": "^4.0.0-0",
    "vuex": "^4.0.0-0"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "~4.5.0",
    "@vue/cli-plugin-eslint": "~4.5.0",
    "@vue/cli-plugin-router": "~4.5.0",
    "@vue/cli-plugin-vuex": "~4.5.0",
    "@vue/cli-service": "~4.5.0",
    "@vue/compiler-sfc": "^3.0.0",
    "babel-eslint": "^10.1.0",
    "eslint": "^6.7.2",
    "eslint-plugin-vue": "^7.0.0-0",
    "vue-cli-plugin-element": "~1.0.1"
  },
  "eslintConfig": {
    "root": true,
    "env": {
      "node": true
    },
    "extends": [
      "plugin:vue/vue3-essential",
      "eslint:recommended"
    ],
    "parserOptions": {
      "parser": "babel-eslint"
    },
    "rules": {}
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not dead"
  ]
}

Answer 1

看来您使用的元素 ui 2 与 vue 3 不兼容，要使用 Vue 3，您必须安装 element ui plus

卸载当前版本:

npm uninstall  element-ui -S

然后安装最新的:

npm i element-plus -S

main.js 最小内容:

import { createApp } from "vue";
import router from "./router";
import store from "./store";

import ElementPlus from "element-plus";
import "element-plus/lib/theme-chalk/index.css";

import App from "./App.vue";

createApp(App)
.use(ElementPlus)
.use(store)
.use(router)
.mount("#app");