目录
一、项目展示
二、项目创建
创建文件夹使用VsCode打开后，新建终端输入以下命令
打开UI创建项目
npm install -g @vue/cli # 安装vue
vue -ui # 在浏览器创建项目
UI创建步骤
配置端口与代理
const { defineConfig } = require('@vue/cli-service')
module.exports = defineConfig({
transpileDependencies: true,
devServer: {
port: 9898,
proxy: {
'/api': {
target: "http://localhost:9897",
changeOrigin: true
}
}
}
})
三、Vue语法
文本插值
<template>
<div id="app">
{{problems[0].id + problems[1].id}} {{problems[0].title}} {{problems[0].level}}
{{problems[0].level === "easy" ? "easy" : "other"}}
</div>
</template>
<script>
const options = {
data: function () {
return {
problems: [
{id: 1, title: "两数之和1", level: "easy"},
{id: 2, title: "两数之和2", level: "easy"},
{id: 3, title: "两数之和3", level: "easy"}
]
};
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>
属性绑定
<template>
<div id="app">
<input type="text" v-bind:value="name">
<input type="text" :value="name">
</div>
</template>
<script>
const options = {
data: function () {
return {
name: "王五"
};
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>
事件绑定
<template>
<div id="app">
<input type="button" v-bind:value="msg" v-on:click="login">
<input type="button" v-bind:value="msg" @click="login">
</div>
</template>
<script>
const options = {
data: function () {
return {
msg: "点我"
};
},
methods: {
login: function () {
alert(options.data().msg)
}
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>
案例加法器实现
<template>
<div id="app">
<input type="button" v-bind:value="addMessage" v-on:click="add">
{{cnt}}
<input type="button" v-bind:value="subMessage" @:click="sub">
</div>
</template>
<script>
const options = {
data: function () {
return {
addMessage: "点我+1",
subMessage: "点我-1",
cnt: 1
};
},
methods: {
sub: function () {
this.cnt = this.cnt - 1;
alert(this.cnt);
},
add: function () {
this.cnt = this.cnt + 1;
alert(this.cnt);
}
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>
双向绑定
<template>
<div id="app">
<input type="text" v-model="name">
{{name}}
</div>
</template>
<script>
const options = {
data: function () {
return {
name: "王五"
};
},
methods: {
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>
axios
安装
npm install axios -S
基础请求
token
携带参数
配置中携带参数
请求体携带参数（默认json）
请求体携带参数（不使用json）
multipart格式（上传头像可）
代码
<template>
<div id="app">
<input type="button" value="简单get" @click="login">
<input type="button" value="token" @click="token">
<input type="button" value="查询字符串带参数" @click="params">
<input type="button" value="配置携带参数" @click="configParams">
<input type="button" value="请求体中的json格式" @click="bodyParams">
<input type="button" value="请求体中的非json格式" @click="bodyParamsNoJson">
<input type="button" value="使用multipart格式" @click="multipartParams">
<input type="button" value="封装axios" @click="getAxios">
</div>
</template>
<script>
import axios from "axios";
const options = {
data: function () {
return {
};
},
methods: {
// 简单get
login: async function () {
const resp = await axios.get("http://localhost:8288/test/compile");
alert(resp.data.data);
localStorage.setItem("token", resp.data.data)
},
// 携带token
token: async function () {
const resp = await axios.post("http://localhost:8288/test/token", {}, {
headers: {
"token": localStorage.getItem("token")
}
})
alert(resp.data.data);
},
// 携带参数在查询字符串中
params: async function () {
const name = encodeURIComponent("张三")
const age = 12
const resp = await axios.post(`http://localhost:8288/test/params?name=${name}&age=${age}`, {}, {})
alert(resp.data.data);
},
// 携带参数在配置中
configParams: async function () {
const name = "张三"
const age = 12
const resp = await axios.post(`http://localhost:8288/test/params`, {}, {
params:{
name: name,
age: age
}
})
alert(resp.data.data);
},
// 请求体中传参,参数默认是json格式
bodyParams: async function () {
const name = "张三"
const age = 12
const resp = await axios.post(`http://localhost:8288/test/params`, {
name: name,
age: age
}, {})
alert(resp.data.data);
},
// 请求体中传参,不用json
bodyParamsNoJson: async function () {
const params = new URLSearchParams()
params.append("name", "往往")
params.append("age", 28)
const resp = await axios.post(`http://localhost:8288/test/params`, params, {})
alert(resp.data.data);
},
// 使用multipart格式---上传头像
multipartParams: async function () {
const params = new FormData()
params.append("name", "lisi")
params.append("age", 11)
const resp = await axios.post(`http://localhost:8288/test/params`, params, {})
alert(resp.data.data);
},
// 封装axios--不可用
getAxios: async function () {
const _axios = axios.create({
baseURL: "http://localhost:8288",
withCredentials: true, // 允许携带token
})
const params = new URLSearchParams()
params.append("name", "往往")
params.append("age", 28)
const resp = await _axios.post(`/test/paramsToken`, params, {
headers: {
"token":"111"
}
})
alert(resp.data.data);
},
},
computed: {
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>响应数据
条件渲染
if-else
代码
<template>
<div id="app">
<div v-if="problems.length > 0">显示数据</div>
<div v-else>不显示</div>
</div>
</template>
<script>
const options = {
data: function () {
return {
problems: [
{id: 1, title: "A+B1", level: "easy"},
{id: 2, title: "A+B2", level: "easy"},
{id: 3, title: "A+B3", level: "easy"},
{id: 4, title: "A+B4", level: "easy"},
]
};
},
methods: {
},
computed: {
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>列表渲染
for
代码
<template>
<div id="app">
<div v-if="problems.length > 0">
<div class="row" v-for="problem of problems" :key="problem.id">
<span>{{problem.id}} </span>
<span>{{problem.title}} </span>
<span>{{problem.level}} </span>
</div>
</div>
<div v-else>不显示</div>
</div>
</template>
<script>
const options = {
data: function () {
return {
problems: [
{id: 1, title: "A+B1", level: "easy"},
{id: 2, title: "A+B2", level: "easy"},
{id: 3, title: "A+B3", level: "easy"},
{id: 4, title: "A+B4", level: "easy"},
]
};
},
methods: {
},
computed: {
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>页面加载就执行方法
组件复用
创建组件
导入组件
使用组件
代码
<template>
<div id="app">
<my-button></my-button>
</div>
</template>
<script>
import MyButton from '@/components/ExamplyView.vue'
const options = {
data: function () {
return {
};
},
components: {
MyButton,
},
mounted() { // 组件加载就执行
},
methods: {
},
computed: {
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>组件插槽
自定义化组件
类似于参数传参
子组件
父组件
四、Element-UI
安装ElementUI
npm install element-ui -S
引入ElementUI
import Vue from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import Element from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'
Vue.use(Element)
Vue.config.productionTip = false
new Vue({
router,
store,
render: h => h(App)
}).$mount('#app')表格
<template>
<div id="app">
<el-table :data="problems">
<el-table-column label="序号" prop="id"></el-table-column>
<el-table-column label="题目" prop="title"></el-table-column>
<el-table-column label="难点" prop="level"></el-table-column>
</el-table>
</div>
</template>
<script>
import MyButton from '@/components/ExamplyView.vue'
const options = {
data: function () {
return {
problems: [
{id: 1, title: "A+B1", level: "easy"},
{id: 2, title: "A+B2", level: "easy"},
{id: 3, title: "A+B3", level: "easy"},
{id: 4, title: "A+B4", level: "easy"},
]
};
},
components: {
MyButton,
},
mounted() { // 组件加载就执行
},
methods: {
},
computed: {
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>分页
静态页面
事件绑定
代码
<template>
<div id="app">
<el-table :data="problems">
<el-table-column label="序号" prop="id"></el-table-column>
<el-table-column label="题目" prop="title"></el-table-column>
<el-table-column label="难点" prop="level"></el-table-column>
</el-table>
<el-pagination
:total="problems.length"
:page-size="pageSize"
:current-page="currentPage"
layout="prev, pager, sizes, next, ->, total"
:page-sizes="pageSizes"
@current-change="currentChange"
@size-change="sizeChange">
</el-pagination>
</div>
</template>
<script>
import MyButton from '@/components/ExamplyView.vue'
const options = {
data: function () {
return {
problems: [
{id: 1, title: "A+B1", level: "easy"},
{id: 2, title: "A+B2", level: "easy"},
{id: 3, title: "A+B3", level: "easy"},
{id: 4, title: "A+B4", level: "easy"},
{id: 5, title: "A+B4", level: "easy"},
{id: 6, title: "A+B4", level: "easy"},
{id: 7, title: "A+B4", level: "easy"},
],
pageSize: 2,
currentPage: 1,
pageSizes: [2, 4]
};
},
components: {
MyButton,
},
mounted() { // 组件加载就执行
},
methods: {
currentChange: function (page) {
// 页面改变 发起请求获取分页数据
this.currentPage = page;
alert(page + ":" + this.pageSize)
},
sizeChange: function(size) {
// 页面展示数据条数改变 发起请求获取数据
this.pageSize = size;
alert(this.currentPage + ":" + size)
}
},
computed: {
}
};
export default options;
</script>
<style>
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>表格+分页+搜索小demo
<template>
<div id="app">
<el-input size="mini" placeholder="请输入题目" style="width: 300px;" v-model="queryVo.title" clearable></el-input>
<el-select placeholder="选择题号" size="mini" style="margin-left: 20px" v-model="queryVo.ids" clearable>
<div v-for="problem in problems" :key="problem.id">
<el-option :value="problem.id"></el-option>
</div>
</el-select>
<el-button size="mini" type="primary" style="margin-left: 20px" @click="query">提交</el-button>
<el-divider></el-divider>
<el-table :data="problems">
<el-table-column label="序号" prop="id"></el-table-column>
<el-table-column label="题目" prop="title"></el-table-column>
<el-table-column label="难点" prop="level"></el-table-column>
</el-table>
<el-pagination
:total="problems.length"
:page-size="pageSize"
:current-page="currentPage"
layout="prev, pager, sizes, next, ->, total"
:page-sizes="pageSizes"
@current-change="currentChange"
@size-change="sizeChange">
</el-pagination>
</div>
</template>
<script>
import MyButton from '@/components/ExamplyView.vue'
const options = {
data: function () {
return {
queryVo: {
title: "",
ids: []
},
problems: [
{id: 1, title: "A+B1", level: "easy"},
{id: 2, title: "A+B2", level: "easy"},
{id: 3, title: "A+B3", level: "easy"},
{id: 4, title: "A+B4", level: "easy"},
{id: 5, title: "A+B4", level: "easy"},
{id: 6, title: "A+B4", level: "easy"},
{id: 7, title: "A+B4", level: "easy"},
],
pageSize: 2,
currentPage: 1,
pageSizes: [2, 4]
};
},
components: {
MyButton,
},
mounted() { // 组件加载就执行
},
methods: {
currentChange: function (page) {
// 页面改变 发起请求获取分页数据
this.currentPage = page;
alert(page + ":" + this.pageSize)
},
sizeChange: function(size) {
// 页面展示数据条数改变 发起请求获取数据
this.pageSize = size;
alert(this.currentPage + ":" + size)
},
query: function () {
// 根据条件进行查询
alert(this.queryVo.title + ":" + this.queryVo.ids)
}
},
computed: {
}
};
export default options;
</script>
<style>
.input1 {
width: 50px;
}
#app {
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
}
nav {
padding: 30px;
}
nav a {
font-weight: bold;
color: #2c3e50;
}
nav a.router-link-exact-active {
color: #42b983;
}
</style>
级联选择器
五、Router
路由配置
路由跳转
<router-link to="target"></router-link> // 页面
this.$router.push(url) // js导航栏案例
六、VueX
vuex
没用到
七、开发
