前端项目导入vue和element

1.安装nodejs

下载链接https://cdn.npmmirror.com/binaries/node/v18.18.0/node-v18.18.0-x64.msi

进入cmd 命令行模式管理员身份运行

输入（node -v）能看到版本号

npm config set prefix "C:\Program Files\nodejs" 默认路径

npm config set prefix " 写你安装的路径 "

切换npm 的淘宝镜像（npm config set registry https://registry.npm.taobao .org）

2.安装vue/cli

输入（ npm install -g @vue/cli ）

出现错误根据错误搜索

安装好了输入（nue ui）

浏览器自动打开（http://localhost:8000）这个网页我们在这里创建项目

桌面创建一个文件夹复制路径 get 关掉

路径改好了输入项目名称点击创建

点击创建就行了

然后刚刚启动vue 的cmd 窗口能看到创建项目

等几分钟完成

启动项目

导入vscode 搜索框输入npm

选择第一个然后就启动了

看到这个已经启动了

打开浏览器输入 http://localhost:8080/然后看到vue的见面

先停掉项目

进入vscode终端按ctrl+c

安装element

vscode 里面项目文件夹（右键）点击（在集成终端中打开）

输入 npm install element-ui@2.15.3

出现错误根据错误搜索

项目文件里看到这个文件 "node_modules\element-ui"已经安装好了

引入elemnt

vue.config.js

const { defineConfig } = require('@vue/cli-service')
module.exports = defineConfig({transpileDependencies: true,devServer:{port:7000}
})

main.js 文件

import Vue from 'vue'
import App from './App.vue'
import router from './router'
// eliment引入的
import ElementUI from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'Vue.config.productionTip = false
// eliment引入的
Vue.use(ElementUI);new Vue({router,render: h => h(App)
}).$mount('#app')

app.vue

<template><div><!-- <h1>{{ message }}</h1>  --><!-- <emp-view></emp-view> --><element-view></element-view></div>
</template><script>
import  ElementView from './views\element\ElementView.vue'export default {components: { ElementView},data() {return {message: "hello vue111",}},methods: {}
}
</script>
<style></style>

ElementView.vue

<template><div><el-row><el-button round>圆角按钮</el-button><el-button type="primary" round>主要按钮</el-button><el-button type="success" round>成功按钮</el-button><el-button type="info" round>信息按钮</el-button><el-button type="warning" round>警告按钮</el-button><el-button type="danger" round>危险按钮</el-button></el-row><!--     <el-row><el-button icon="el-icon-search" circle></el-button><el-button type="primary" icon="el-icon-edit" circle></el-button><el-button type="success" icon="el-icon-check" circle></el-button><el-button type="info" icon="el-icon-message" circle></el-button><el-button type="warning" icon="el-icon-star-off" circle></el-button><el-button type="danger" icon="el-icon-delete" circle></el-button>
</el-row> --><!-- 表格 --><br><el-table :data="tableData" border style="width: 100%"><el-table-column prop="date" label="日期" width="180"></el-table-column><el-table-column prop="name" label="姓名" width="180"></el-table-column><el-table-column prop="address" label="地址"></el-table-column></el-table><!-- pagination --><!-- <el-pagination background layout="prev, pager, next" :total="1000"></el-pagination> --><el-pagination background layout="total,sizes, prev, pager, next, jumper, ->,  slot" @size-change="handleSizeChange"@current-change="handleCurrentChange" :total="1000"></el-pagination><div><el-button type="text" @click="dialogTableVisible = true">打开嵌套表格的 Dialog</el-button><br><!-- 对话框 --><el-dialog title="收货地址" :visible.sync="dialogTableVisible"><el-table :data="gridData"><el-table-column property="date" label="日期" width="150"></el-table-column><el-table-column property="name" label="姓名" width="200"></el-table-column><el-table-column property="address" label="地址"></el-table-column></el-table></el-dialog><!-- 对话框for --><el-button type="text" @click="dialogFormeVisible = true">打开嵌form的 Dialog</el-button><!-- <el-table title="form表单" :visible.sync="dialogFormeVisible"></el-table> --><el-dialog title="收货地址" :visible.sync="dialogFormeVisible"><el-input v-model="input" placeholder="请输入内容"></el-input></el-dialog><br><!-- 对话框for --><el-button type="text" @click="Visible = true">打开嵌套表格的 Dialog</el-button><el-dialog title="收货地址" :visible.sync="Visible"><el-input v-model="input" placeholder="请输入内容"></el-input><el-table :data="gridData"><el-table-column property="date" label="日期" width="150"></el-table-column><el-table-column property="name" label="姓名" width="200"></el-table-column><el-table-column property="address" label="地址"></el-table-column></el-table></el-dialog></div><el-button type="text" @click="Visibleed = true">打开嵌套表格的 Dialog</el-button><el-dialog title="收货地址" :visible.sync="Visibleed"><el-form ref="form" :model="form" label-width="80px"><el-form-item label="活动名称"><el-input v-model="form.name"></el-input></el-form-item><el-form-item label="活动区域"><el-select v-model="form.region" placeholder="请选择活动区域"><el-option label="区域一" value="shanghai"></el-option><el-option label="区域二" value="beijing"></el-option></el-select></el-form-item><el-form-item label="活动时间"><el-col :span="11"><el-date-picker type="date" placeholder="选择日期" v-model="form.date1" style="width: 100%;"></el-date-picker></el-col><el-col class="line" :span="2">-</el-col><el-col :span="11"><el-time-picker placeholder="选择时间" v-model="form.date2" style="width: 100%;"></el-time-picker></el-col></el-form-item><el-form-item><el-button type="primary" @click="onSubmit">立即创建</el-button><el-button>取消</el-button></el-form-item>
</el-form></el-dialog></div>
</template><script>export default {data() {return {form:{name: '',region: '',date1: '',date2: '',},gridData: [{date: '2016-05-02',name: '王小虎',address: '上海市普陀区金沙江路 1518 弄'}, {date: '2016-05-04',name: '王小虎',address: '上海市普陀区金沙江路 1518 弄'}, {date: '2016-05-01',name: '王小虎',address: '上海市普陀区金沙江路 1518 弄'}, {date: '2016-05-03',name: '王小虎',address: '上海市普陀区金沙江路 1518 弄'}],dialogTableVisible: false,dialogFormeVisible: false,Visible: false,Visibleed: false,tableData: [{date: '2016-05-02',name: '王小虎',address: '上海市普陀区金沙江路 1518 弄'}, {date: '2016-05-04',name: '王小虎',address: '上海市普陀区金沙江路 1517 弄'}, {date: '2016-05-01',name: '王小虎',address: '上海市普陀区金沙江路 1519 弄'}, {date: '2016-05-03',name: '王小虎',address: '上海市普陀区金沙江路 1516 弄'},],};},methods: {handleSizeChange: function (val) {alert("每页记录变化" + val)},handleCurrentChange: function (val) {alert("每页记录数变化" + val)},onSubmit:function(){alert(JSON.stringify(this.form));}}
};</script><style ></style>

自己创建一个文件 src\views\名字文件夹的\ElementView.vue 注意大小

app.文件

错误

npm ERR! code ERESOLVE
npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: day5-demo@0.0.0
npm ERR! Found: vue@3.0.2
npm ERR! node_modules/vue
npm ERR!   peer vue@"3.0.2" from @vue/compiler-sfc@3.0.2
npm ERR!   node_modules/@vue/compiler-sfc
npm ERR!     peer @vue/compiler-sfc@"*" from rollup-plugin-vue@6.0.0-beta.10
npm ERR!     node_modules/rollup-plugin-vue
npm ERR!       rollup-plugin-vue@"^6.0.0-beta.10" from vite@1.0.0-rc.6
npm ERR!       node_modules/vite
npm ERR!         dev vite@"^1.0.0-rc.1" from the root project
npm ERR!     @vue/compiler-sfc@"^3.0.0-rc.10" from vite@1.0.0-rc.6
npm ERR!     node_modules/vite
npm ERR!       dev vite@"^1.0.0-rc.1" from the root project
npm ERR!     1 more (the root project)
npm ERR!   vue@"^3.0.0-rc.10" from vite@1.0.0-rc.6
npm ERR!   node_modules/vite
npm ERR!     dev vite@"^1.0.0-rc.1" from the root project
npm ERR!   1 more (the root project)
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! vue-router@"4.0.13" from the root project
npm ERR!
npm ERR! Conflicting peer dependency: vue@3.2.41
npm ERR!   peer vue@"^3.2.0" from vue-router@4.0.13
npm ERR!   node_modules/vue-router
npm ERR!     vue-router@"4.0.13" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See C:\Users\zeyi\AppData\Local\npm-cache\eresolve-report.txt for a full report.npm ERR! A complete log of this run can be found in:

根据错误提示，在命令行中加入–legacy-peer-deps，由于vue与vue-router版本兼容的问题，需要在安装语句后加入需要下载vue-router版本，不然会下载最新的vue-router版本。

npm install --legacy-peer-deps vue-router@4.0.13

也有可能因为是你要下载的router版本过高，如果下载版本过高，在启动项目时会报错，可以下载低版本的vue-router

npm install vue-router@3.1.3 --save-dev

最后在package.json文件中查看是否下载成功

npm install element-ui@2.15.3

错误

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Admin\AppData\Local\npm-cache\_logs\2022-06-14T08_44_12_502Z-debug-0.log

删除node_modules和package-lock.json，然后运行
```
npm install
```
或尝试清除NPM缓存
```
npm cache clean --force
```
或使用--legacy-peer-deps选项运行命令
```
npm install --legacy-peer-deps
```
或使用--force选项运行命令
```
npm install --force
```
npm install element-ui@2.15.3

错误

npm install --legacy-peer-deps

A complete log of this run can be found in: C:\Users\Mamkap\AppData\Local\npm-cache\_logs\2023-11-08T03_49_10_551Z-debug-0.log
Waiting for the debugger to disconnect...

执行 npm install npm@latest -g 升级到最新版本（若升级到最新版本还是报错，则还需要再全局更新一下npm，更新后检查npm版本号不会变，内部应该有更新）；
.删除本地node_modules 依赖包；
执行 npm cache clean --force 清理缓存；
npm i 安装依赖；
以上过程，尝试一次不行，可以多尝试几次就OK了

错误

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: vol.vue3@0.1.0
npm ERR! Found: vue@3.2.20
npm ERR! node_modules/vue
npm ERR!   vue@"^3.0.0" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer vue@"^2.5.17" from element-ui@2.15.6
npm ERR! node_modules/element-ui
npm ERR!   element-ui@"*" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See C:\Users\Administrator\AppData\Local\npm-cache\eresolve-report.txt for a full report.npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Administrator\AppData\Local\npm-cache\_logs\2021-10-11T06_27_44_908Z-debug.log

npm i element-ui @xdh/my --legacy-peer-deps

`npm install npm -g` 更新一下

我这里是使用清除npm的缓存解决的（npm cache clean --force）

错误

解决方案：

降级npm到6版本，在终端运行以下命令

npm install --legacy-peer-deps

npm install vue@2.5.17 --save

npx -p npm@6 npm i --legacy-peer-deps

这个错误通常是由于 npm 无法解决依赖关系而引起的。你可以尝试以下几个步骤
1.清除npm 缓存: npm cache clean --force
2.更新 npm: npm install -g npm@latest
3.删除 node modules 文件夹:rm -rf node modules
4.删除 package-lock.json 文件: rm -rf package-lock.json
5.重新安装依赖: npm install