关于前端:使用vite快速搭建vue3ElementPlus项目

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通过在终端中运行以下命令，能够应用 Vite 疾速构建 Vue 我的项目。

$ npm init vite-app <project-name>
$ cd <project-name>
$ npm install
$ npm run dev

装置 Element Plus:

npm install element-plus --save

main.js 中残缺引入 Element Plus：

import {createApp} from 'vue'
import ElementPlus from 'element-plus';
import 'element-plus/lib/theme-chalk/index.css';
import App from './App.vue';

const app = createApp(App)
app.use(ElementPlus)
app.mount('#app')

执行命令装置 sass，npm i sass -D，而后在 vue 文件的 style 标签下退出 lang=”scss” 即可，这些与以前 vue2 都是一样的。

npm i sass -D

装置 eslint

npm i eslint -D

应用 eslint 对本我的项目进行初始化

npx eslint --init

依照提醒进行设置，这是我抉择的设置

装置 Vue Router 4

npm install vue-router@4

在 src 目录下新建 router 文件夹，并在 router 下新建 index.js 进行路由配置

import * as VueRouter from 'vue-router'

const routes = [
  {
    path: '/',
    component: () => import('../page/Home.vue')
  }, {
    path: '/login',
    component: () => import('../page/Login.vue')
  }
]

export default VueRouter.createRouter({history: VueRouter.createWebHashHistory(),
  routes
})

在 main.js 下应用该中间件

import router from './router'
//...
app.use(router)

装置 vuex

npm install vuex@next --save

在 src 下创立 store 门路，并在 store 下创立 index.js

import {createStore} from 'vuex'

export default createStore({state () {
    return {username: ''}
  },
  mutations: {setUserName (state, payload) {state.username = payload}
  }
})

在 main.js 下应用 store

import vuex from './store'
//...
app.use(vuex)

对于网络申请，这里应用 axios，首先装置 axios

npm i axios

在 src 目录下创立 api 目录，并在 api 门路下创立 axios.js，配置 axios 实例

// axios.js
import axios from 'axios'
// import config from '../../config'
import {useRouter} from 'vue-router'

export default function () {
  // 1. 发送申请的时候，如果有 token，须要附带到申请头中
  const token = localStorage.getItem('token')
  let instance = axios

  if (token) {
    instance = axios.create({
      // baseURL: config.server,
      headers: {authorization: 'Bearer' + token}
    })
  }

  const router = useRouter()
  instance.interceptors.response.use((resp) => {
      // 2. 响应的时候，如果有 token，保留 token 到本地（localstorage）if (resp.data.data.token) {localStorage.setItem('token', resp.data.data.token)
      }
      // 3. 响应的时候，如果响应的音讯码是 403（没有 token，token 生效），在本地删除 token
      if (resp.data.code === 403) {localStorage.removeItem('token')
        localStorage.removeItem('username')
        router.push({name: 'Login'})
      }
      return resp
    },
    (err) => {return Promise.reject(err)
    }
  )

  return instance
}

在 api 门路下创立 index.js 编写 api

import request from './axios.js'
import config from '../../config'
export default {
  // 登录
  login (params) {return request().post(`${config.server}/login`, params)
  },
  // 获取用户列表
  getUserList (params) {return request().get(`${config.server}/user/list`, {params: params})
  },
  // 增加一个用户
  createUser (params) {return request().post(`${config.server}/user/`, params)
  },
  //...

接下来应用 vue3 的 composition api 进行组件的开发，这里列举一个 User 模块的开发:

<template>
  <div class="user-wrap">
      <el-button
        class="create-btn"
        type="success"
        size="small"
      @click="handleCreate"> 新增用户 +</el-button>
      <el-table
        :data="tableData"
        style="width: 100%">
        <el-table-column
            label="用户名"
            prop="username">
        </el-table-column>
        <el-table-column
            label="明码"
            prop="password">
        </el-table-column>
        <el-table-column
            align="right">
            <template #header>
                <el-input
                v-model="search"
                @blur="searchUser"
                size="mini"
                placeholder="输出用户名搜寻"/>
            </template>
            <template #default="scope">
                <el-button
                size="mini"
                @click="handleEdit(scope.$index, scope.row)"> 编辑 </el-button>
                <el-button
                size="mini"
                type="danger"
                @click="handleDelete(scope.$index, scope.row)"> 删除 </el-button>
            </template>
        </el-table-column>
    </el-table>
    <el-pagination
      :hide-on-single-page="hideOnSinglePage"
      class="page-wrap"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="currentPage"
      :page-sizes="[10, 20, 30, 40]"
      :page-size="pageSize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="totalCount">
    </el-pagination>
    <el-dialog title="用户信息" v-model="dialogFormVisible">
        <el-form :model="form">
            <el-form-item label="用户名" :label-width="formLabelWidth">
                <el-input v-model="form.username" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="明码" :label-width="formLabelWidth">
                <el-input v-model="form.password" autocomplete="off"></el-input>
            </el-form-item>
        </el-form>
        <template #footer>
            <span class="dialog-footer">
                <el-button @click="dialogFormVisible = false"> 取 消 </el-button>
                <el-button type="primary" @click="confirmUser"> 确 定 </el-button>
            </span>
        </template>
    </el-dialog>
  </div>
</template>

<script>
import {ref, computed} from 'vue'
import api from '../../../api/index'
import {ElMessage, ElMessageBox} from 'element-plus'

export default {setup () {
    let status = ''
    let userId = null
    const formLabelWidth = ref('120px')

    // 获取用户列表
    const tableData = ref([])
    async function getList (params) {const res = await api.getUserList(params)
      if (res.data.success) {
        tableData.value = res.data.data.userList
        totalCount.value = res.data.data.count
        search.value = ''
      } else {ElMessage.error('获取用户列表失败：' + res.data.msg)
      }
    }
    getList()

    const form = ref({
      username: '',
      password: ''
    })

    const dialogFormVisible = ref(false)

    // 提交用户信息
    async function confirmUser () {
      // 验证信息是否齐全
      if (!(form.value.username && form.value.password)) {ElMessage.error('表单信息不全')
        return
      }
      switch (status) {
        case 'create':
          createUser(form.value)
          break
        case 'edit':
          updateUser(userId, form.value)
          break
      }
    }

    // 增加用户
    async function handleCreate () {
      form.value = {
        username: '',
        password: ''
      }
      dialogFormVisible.value = true
      status = 'create'
    }
    // 增加用户信息
    async function createUser (params) {const res = await api.createUser(params)
      if (res.data.success) {getList()
        ElMessage.success({
          message: '增加胜利',
          type: 'success'
        })
        dialogFormVisible.value = false
      } else {ElMessage.error('增加失败：' + res.data.msg)
      }
    }

    // 编辑用户
    async function handleEdit (index, row) {console.log(index, row)
      dialogFormVisible.value = true
      status = 'edit'
      form.value.username = row.username
      form.value.password = row.password
      userId = row.id
    }
    // 批改用户信息
    async function updateUser (id, params) {const res = await api.updateUser(id, params)
      if (res.data.success) {
        ElMessage.success({
          message: '批改胜利',
          type: 'success'
        })
        getList()
        dialogFormVisible.value = false
      } else {ElMessage.error('批改失败：' + res.data.msg)
      }
    }

    // 删除用户
    const handleDelete = async (index, row) => {
      ElMessageBox.confirm('此操作将永恒删除该用户, 是否持续?', '提醒', {
        confirmButtonText: '确定',
        cancelButtonText: '勾销',
        type: 'warning'
      }).then(async () => {await delUser(row.id)
      }).catch(() => {
        ElMessage({
          type: 'info',
          message: '已勾销删除'
        })
      })
    }
    // 删除用户信息
    async function delUser (id) {const res = await api.delUser(id)
      if (res.data.success) {getList()
        ElMessage.success({
          type: 'success',
          message: '删除胜利!'
        })
      } else {ElMessage.error('删除失败：' + res.data.msg)
      }
    }

    // 搜寻用户
    const search = ref('')
    async function searchUser () {
      currentPage.value = 1
      pageSize.value = 10
      if (search.value === '') {getList({ pageindex: currentPage.value, pagesize: pageSize.value})
        return
      }
      currentPage.val = 1
      const res = await api.findUserByUsername({username: search.value})
      if (res.data.success) {
        tableData.value = res.data.data.userList
        ElMessage.success({
          message: '搜寻胜利',
          type: 'success'
        })
      } else {ElMessage.error('批改失败：' + res.data.msg)
      }
    }

    // 分页相干
    const totalCount = ref(0)
    const currentPage = ref(1)
    const pageSize = ref(10)
    function handleSizeChange (val) {
      pageSize.value = val
      getList({pageindex: currentPage.value, pagesize: val})
    }
    function handleCurrentChange (val) {
      currentPage.value = val
      getList({pageindex: val, pagesize: pageSize.value})
    }
    // 超过一页就暗藏分页插件
    const hideOnSinglePage = computed(() => {return totalCount.value <= 10})

    return {
      tableData,
      search,
      dialogFormVisible,
      form,
      formLabelWidth,
      createUser,
      handleEdit,
      handleDelete,
      confirmUser,
      handleCreate,
      searchUser,
      currentPage,
      totalCount,
      handleSizeChange,
      handleCurrentChange,
      pageSize,
      hideOnSinglePage
    }
  }
}
</script>

<style lang="scss" scoped>
    .user-wrap{
        width: 100%;
        min-width: 500px;
        .create-btn{
            margin-bottom: 10px;
            display: flex;
            justify-content: flex-end;
        }
        .page-wrap{margin-top: 10px;}
    }
</style>

正文完