├── node_modules
├── public
│ ├── favicon.ico: 页签图标
│ ├── index.html: 主页面
├── src
│ ├── assets: 存放静态资源
│ │ └── logo.png
│ │── component: 存放组件
│ │ └── HelloWorld.vue
│ │── App.vue: 汇总所有组件
│ │── main.js: 入口文件
├── .gitignore: git 版本管制忽略的配置
├── babel.config.js: babel 的配置文件
├── package.json: 应用包配置文件
├── README.md: 应用描述文件
├── package-lock.json:包版本控制文件
## 脚手架文件结构
├── node_modules
├── public
│ ├── favicon.ico: 页签图标
│ └── index.html: 主页面
├── src
│ ├── assets: 存放静态资源
│ │ └── logo.png
│ │── component: 存放组件
│ │ └── HelloWorld.vue
│ │── App.vue: 汇总所有组件
│ │── main.js: 入口文件
├── .gitignore: git版本管制忽略的配置
├── babel.config.js: babel的配置文件
├── package.json: 应用包配置文件
├── README.md: 应用描述文件
├── package-lock.json:包版本控制文件
## 关于不同版本的Vue
1. vue.js与vue.runtime.xxx.js的区别:
1. vue.js是完整版的Vue,包含:核心功能 + 模板解析器。
2. vue.runtime.xxx.js是运行版的Vue,只包含:核心功能;没有模板解析器。
2. 因为vue.runtime.xxx.js没有模板解析器,所以不能使用template这个配置项,需要使用render函数接收到的createElement函数去指定具体内容。
## vue.config.js配置文件
1. 使用vue inspect > output.js可以查看到Vue脚手架的默认配置。
2. 使用vue.config.js可以对脚手架进行个性化定制,详情见:https://cli.vuejs.org/zh
// components/School.vue
<template>
<div class="school">
<h2>学校名称:{{name}}h2>
<h2>学校地址:{{address}}h2>
div>
template>
<script>
export default {
name:'School',
data() {
return {
name:'尚硅谷',
address:'北京·昌平'
}
},
}
script>
<style>
.school{
background-color: gray;
}
style>
// App.vue
<template>
<div>
<h1 v-text="msg" ref="title">h1>
<button ref="btn" @click="showDOM">点我输出上方的DOM元素button>
<School ref="sch"/>
div>
template>
<script>
//引入School组件
import School from './components/School'
export default {
name:'App',
components:{School},
data() {
return {
msg:'欢迎学习Vue!'
}
},
methods: {
showDOM(){
console.log(this.$refs.title) //真实DOM元素
console.log(this.$refs.btn) //真实DOM元素
console.log(this.$refs.sch) //School组件的实例对象(vc)
}
},
}
script>
// main.js
//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
//关闭Vue的生产提示
Vue.config.productionTip = false
//创建vm
new Vue({
el:'#app',
render: h => h(App)
})
## ref属性
1. 被用来给元素或子组件注册引用信息(id的替代者)
2. 应用在html标签上获取的是真实DOM元素,应用在组件标签上是组件实例对象(vc)
3. 使用方式:
1. 打标识:```<h1 ref="xxx">.....h1>```或 ```<School ref="xxx">School>```
2. 获取:```this.$refs.xxx```
// App.vue
<template>
<div>
<Student name="李四" sex="女" :age="18"/>
div>
template>
<script>
import Student from './components/Student'
export default {
name:'App',
components:{Student}
}
script>
// components/Student.vue
<template>
<div>
<h1>{{msg}}h1>
<h2>学生姓名:{{name}}h2>
<h2>学生性别:{{sex}}h2>
<h2>学生年龄:{{myAge+1}}h2>
<button @click="updateAge">尝试修改收到的年龄button>
div>
template>
<script>
export default {
name:'Student',
data() {
console.log(this)
return {
msg:'我是一个尚硅谷的学生',
myAge:this.age
}
},
methods: {
updateAge(){
this.myAge++
}
},
//简单声明接收
// props:['name','age','sex']
//接收的同时对数据进行类型限制
/* props:{
name:String,
age:Number,
sex:String
} */
//接收的同时对数据:进行类型限制+默认值的指定+必要性的限制
props:{
name:{
type:String, //name的类型是字符串
required:true, //name是必要的
},
age:{
type:Number,
default:99 //默认值
},
sex:{
type:String,
required:true
}
}
}
script>
## props配置项
1. 功能:让组件接收外部传过来的数据
2. 传递数据:```<Demo name="xxx"/>```
3. 接收数据:
1. 第一种方式(只接收):```props:['name'] ```
2. 第二种方式(限制类型):```props:{name:String}```
3. 第三种方式(限制类型、限制必要性、指定默认值):
```js
props:{
name:{
type:String, //类型
required:true, //必要性
default:'老王' //默认值
}
}
```
> 备注:props是只读的,Vue底层会监测你对props的修改,如果进行了修改,就会发出警告,若业务需求确实需要修改,那么请复制props的内容到data中一份,然后去修改data中的数据。
// App.vue
<template>
<div>
<School/>
<hr>
<Student/>
div>
template>
<script>
import School from './components/School'
import Student from './components/Student'
export default {
name:'App',
components:{School,Student}
}
script>
// components/School.vue
<template>
<div>
<h2 @click="showName">学校名称:{{name}}h2>
<h2>学校地址:{{address}}h2>
div>
template>
<script>
//引入一个hunhe
// import {hunhe,hunhe2} from '../mixin'
export default {
name:'School',
data() {
return {
name:'尚硅谷',
address:'北京',
x:666
}
},
// mixins:[hunhe,hunhe2],
}
script>
// components/Student.vue
<template>
<div>
<h2 @click="showName">学生姓名:{{name}}h2>
<h2>学生性别:{{sex}}h2>
div>
template>
<script>
// import {hunhe,hunhe2} from '../mixin'
export default {
name:'Student',
data() {
return {
name:'张三',
sex:'男'
}
},
// mixins:[hunhe,hunhe2]
}
script>
// main.js
//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
import {hunhe,hunhe2} from './mixin'
//关闭Vue的生产提示
Vue.config.productionTip = false
Vue.mixin(hunhe)
Vue.mixin(hunhe2)
//创建vm
new Vue({
el:'#app',
render: h => h(App)
})
// mixin.js
export const hunhe = {
methods: {
showName(){
alert(this.name)
}
},
mounted() {
console.log('你好啊!')
},
}
export const hunhe2 = {
data() {
return {
x:100,
y:200
}
},
}
## mixin(混入)
1. 功能:可以把多个组件共用的配置提取成一个混入对象
2. 使用方式:
第一步定义混合:
```
{
data(){....},
methods:{....}
....
}
```
第二步使用混入:
全局混入:```Vue.mixin(xxx)```
局部混入:```mixins:['xxx'] ```
// plugins.js
export default {
install(Vue,x,y,z){
console.log(x,y,z)
//全局过滤器
Vue.filter('mySlice',function(value){
return value.slice(0,4)
})
//定义全局指令
Vue.directive('fbind',{
//指令与元素成功绑定时(一上来)
bind(element,binding){
element.value = binding.value
},
//指令所在元素被插入页面时
inserted(element,binding){
element.focus()
},
//指令所在的模板被重新解析时
update(element,binding){
element.value = binding.value
}
})
//定义混入
Vue.mixin({
data() {
return {
x:100,
y:200
}
},
})
//给Vue原型上添加一个方法(vm和vc就都能用了)
Vue.prototype.hello = ()=>{alert('你好啊')}
}
}
// main.js
//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
//引入插件
import plugins from './plugins'
//关闭Vue的生产提示
Vue.config.productionTip = false
//应用(使用)插件
Vue.use(plugins,1,2,3)
//创建vm
new Vue({
el:'#app',
render: h => h(App)
})
// App.vue
<template>
<div>
<School/>
<hr>
<Student/>
div>
template>
<script>
import School from './components/School'
import Student from './components/Student'
export default {
name:'App',
components:{School,Student}
}
script>
// components/School.vue
<template>
<div>
<h2>学校名称:{{name | mySlice}}h2>
<h2>学校地址:{{address}}h2>
<button @click="test">点我测试一个hello方法button>
div>
template>
<script>
export default {
name:'School',
data() {
return {
name:'小帽学堂',
address:'深圳',
}
},
methods: {
test(){
this.hello()
}
},
}
script>
// components/Student.vue
<template>
<div>
<h2>学生姓名:{{name}}h2>
<h2>学生性别:{{sex}}h2>
<input type="text" v-fbind:value="name">
div>
template>
<script>
export default {
name:'Student',
data() {
return {
name:'张三',
sex:'男'
}
},
}
script>
## 插件
1. 功能:用于增强Vue
2. 本质:包含install方法的一个对象,install的第一个参数是Vue,第二个以后的参数是插件使用者传递的数据。
3. 定义插件:
```js
对象.install = function (Vue, options) {
// 1. 添加全局过滤器
Vue.filter(....)
// 2. 添加全局指令
Vue.directive(....)
// 3. 配置全局混入(合)
Vue.mixin(....)
// 4. 添加实例方法
Vue.prototype.$myMethod = function () {...}
Vue.prototype.$myProperty = xxxx
}
```
4. 使用插件:```Vue.use()```
// App.vue
<template>
<div>
<h1 class="title">你好啊h1>
<School/>
<Student/>
div>
template>
<script>
import Student from './components/Student'
import School from './components/School'
export default {
name:'App',
components:{School,Student}
}
script>
<style scoped>
.title{
color: red;
}
style>
// main.js
//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
//关闭Vue的生产提示
Vue.config.productionTip = false
//创建vm
new Vue({
el:'#app',
render: h => h(App)
})
// components/School.vue
<template>
<div class="demo">
<h2 class="title">学校名称:{{name}}h2>
<h2>学校地址:{{address}}h2>
div>
template>
<script>
export default {
name:'School',
data() {
return {
name:'小帽学堂',
address:'深圳',
}
}
}
script>
<style scoped>
.demo{
background-color: skyblue;
}
style>
// components/Student.vue
<template>
<div class="demo">
<h2 class="title">学生姓名:{{name}}h2>
<h2 class="alex">学生性别:{{sex}}h2>
div>
template>
<script>
export default {
name:'Student',
data() {
return {
name:'张三',
sex:'男'
}
}
}
script>
<style lang="less" scoped>
.demo{
background-color: pink;
.alex{
font-size: 40px;
}
}
style>
## scoped样式
1. 作用:让样式在局部生效,防止冲突。
2. 写法:```<style scoped>```
// App.vue
<template>
<div id="root">
<div class="todo-container">
<div class="todo-wrap">
<MyHeader/>
<MyList/>
<MyFooter/>
div>
div>
div>
template>
<script>
import MyHeader from './components/MyHeader'
import MyList from './components/MyList'
import MyFooter from './components/MyFooter.vue'
export default {
name:'App',
components:{MyHeader,MyList,MyFooter}
}
script>
<style>
/*base*/
body {
background: #fff;
}
.btn {
display: inline-block;
padding: 4px 12px;
margin-bottom: 0;
font-size: 14px;
line-height: 20px;
text-align: center;
vertical-align: middle;
cursor: pointer;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
border-radius: 4px;
}
.btn-danger {
color: #fff;
background-color: #da4f49;
border: 1px solid #bd362f;
}
.btn-danger:hover {
color: #fff;
background-color: #bd362f;
}
.btn:focus {
outline: none;
}
.todo-container {
width: 600px;
margin: 0 auto;
}
.todo-container .todo-wrap {
padding: 10px;
border: 1px solid #ddd;
border-radius: 5px;
}
style>
// components/MyHeader.vue
<template>
<div class="todo-header">
<input type="text" placeholder="请输入你的任务名称,按回车键确认"/>
div>
template>
<script>
export default {
name:'MyHeader',
}
script>
<style scoped>
/*header*/
.todo-header input {
width: 560px;
height: 28px;
font-size: 14px;
border: 1px solid #ccc;
border-radius: 4px;
padding: 4px 7px;
}
.todo-header input:focus {
outline: none;
border-color: rgba(82, 168, 236, 0.8);
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
style>
// components/MyList.vue
<template>
<ul class="todo-main">
<MyItem/>
<MyItem/>
<MyItem/>
<MyItem/>
ul>
template>
<script>
import MyItem from './MyItem'
export default {
name:'MyList',
components:{MyItem}
}
script>
<style scoped>
/*main*/
.todo-main {
margin-left: 0px;
border: 1px solid #ddd;
border-radius: 2px;
padding: 0px;
}
.todo-empty {
height: 40px;
line-height: 40px;
border: 1px solid #ddd;
border-radius: 2px;
padding-left: 5px;
margin-top: 10px;
}
style>
// components/MyItem.vue
<template>
<li>
<label>
<input type="checkbox">
<span>xxxxxspan>
label>
<button class="btn btn-danger" @style="display:none">删除button>
li>
template>
<script>
export default {
name:'MyItem'
}
script>
<style scoped>
/*item*/
li {
list-style: none;
height: 36px;
line-height: 36px;
padding: 0 5px;
border-bottom: 1px solid #ddd;
}
li label {
float: left;
cursor: pointer;
}
li label li input {
vertical-align: middle;
margin-right: 6px;
position: relative;
top: -1px;
}
li button {
float: right;
display: none;
margin-top: 3px;
}
li:before {
content: initial;
}
li:last-child {
border-bottom: none;
}
li:hover{
background-color: #ddd;
}
li:hover button{
display: block;
}
style>
// components/MyList.vue
<template>
<ul class="todo-main">
<MyItem
v-for="todoObj in todos"
:key="todoObj.id"
:todo="todoObj"
/>
ul>
template>
<script>
import MyItem from './MyItem'
export default {
name:'MyList',
components:{MyItem},
data(){
return {
todos: [
{id:'001', title:'抽烟',done:true},
{id:'002', title:'喝酒',done:false},
{id:'003', title:'开车',done:true}
]
}
}
}
script>
<style scoped>
...
style>
// components/MyItem.vue
<template>
<li>
<label>
<input type="checkbox" :checked="todo.done" />
<span>{{todo.title}}span>
label>
<button class="btn btn-danger" style="display:none">删除button>
li>
template>
<script>
export default {
name:'MyItem',
//声明接收todo对象
props:['todo']
}
script>
<style scoped>
...
style>
// components/MyHeader.vue
<template>
<div class="todo-header">
<input type="text" placeholder="请输入你的任务名称,按回车键确认" v-model="title" @keyup.enter="add"/>
div>
template>
<script>
import {nanoid} from 'nanoid'
export default {
name:'MyHeader',
props:['addTodo'],
data() {
return {
//收集用户输入的title
title:''
}
},
methods: {
add(){
//校验数据
if(!this.title.trim()) return alert('输入不能为空')
//将用户的输入包装成一个todo对象
const todoObj = {id:nanoid(),title:this.title,done:false}
//通知App组件去添加一个todo对象
this.addTodo(todoObj)
//清空输入
this.title = ''
}
}
}
script>
<style scoped>
...
style>
// App.vue
<template>
<div id="root">
<div class="todo-container">
<div class="todo-wrap">
<MyHeader :addTodo="addTodo" />
<MyList :todos="todos"/>
<MyFooter/>
div>
div>
div>
template>
<script>
import MyHeader from './components/MyHeader'
import MyList from './components/MyList'
import MyFooter from './components/MyFooter.vue'
export default {
name:'App',
components:{MyHeader,MyList,MyFooter},
data() {
return {
todos: [
{id:'001', title:'抽烟',done:true},
{id:'002', title:'喝酒',done:false},
{id:'003', title:'开车',done:true}
]
}
},
methods: {
addTodo(todoObj) {
this.todos.unshift(todoObj)
}
}
}
script>
<style>
...
style>
// components/MyList.vue
<template>
<ul class="todo-main">
<MyItem
v-for="todoObj in todos"
:key="todoObj.id"
:todo="todoObj"
/>
ul>
template>
<script>
import MyItem from './MyItem'
export default {
name:'MyList',
components:{MyItem},
props:['todos']
}
script>
<style scoped>
...
style>
// components/MyItem.vue
<template>
<li>
<label>
<input type="checkbox" :checked="todo.done" @change="handleCheck(todo.id)"/>
<span>{{todo.title}}span>
label>
<button class="btn btn-danger" style="display:none">删除button>
li>
template>
<script>
export default {
name:'MyItem',
//声明接收todo对象
props:['todo', 'checkTodo'],
methods: {
//勾选or取消勾选
handleCheck(id){
//通知App组件将对应的todo对象的done值取反
this.checkTodo(id)
}
},
}
script>
<style scoped>
...
style>
// App.vue
<template>
<div id="root">
<div class="todo-container">
<div class="todo-wrap">
<MyHeader :addTodo="addTodo" />
<MyList :todos="todos" :checkTodo="checkTodo"/>
<MyFooter/>
div>
div>
div>
template>
<script>
import MyHeader from './components/MyHeader'
import MyList from './components/MyList'
import MyFooter from './components/MyFooter.vue'
export default {
name:'App',
components:{MyHeader,MyList,MyFooter},
data() {
return {
todos: [
{id:'001', title:'抽烟',done:true},
{id:'002', title:'喝酒',done:false},
{id:'003', title:'开车',done:true}
]
}
},
methods: {
addTodo(todoObj) {
this.todos.unshift(todoObj)
},
//勾选or取消勾选一个todo
checkTodo(id){
this.todos.forEach((todo)=>{
if(todo.id === id) todo.done = !todo.done
})
}
}
}
script>
<style>
...
style>
// components/MyList.vue
<template>
<ul class="todo-main">
<MyItem
v-for="todoObj in todos"
:key="todoObj.id"
:todo="todoObj"
:checkTodo="checkTodo"
/>
ul>
template>
<script>
import MyItem from './MyItem'
export default {
name:'MyList',
components:{MyItem},
props:['todos', 'checkTodo']
}
script>
<style scoped>
...
style>
// components/MyItem.vue
<template>
<li>
<label>
<input type="checkbox" :checked="todo.done" @change="handleCheck(todo.id)"/>
<span>{{todo.title}}span>
label>
<button class="btn btn-danger" @click="handleDelete(todo.id)">删除button>
li>
template>
<script>
export default {
name:'MyItem',
//声明接收todo、checkTodo、deleteTodo
props:['todo','checkTodo','deleteTodo'],
methods: {
//勾选or取消勾选
handleCheck(id){
//通知App组件将对应的todo对象的done值取反
this.checkTodo(id)
},
//删除
handleDelete(id){
if(confirm('确定删除吗?')){
//通知App组件将对应的todo对象删除
this.deleteTodo(id)
}
}
},
}
script>
<style scoped>
...
style>
// App.vue
<template>
<div id="root">
<div class="todo-container">
<div class="todo-wrap">
<MyHeader :addTodo="addTodo" />
<MyList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo"/>
<MyFooter/>
div>
div>
div>
template>
<script>
import MyHeader from './components/MyHeader'
import MyList from './components/MyList'
import MyFooter from './components/MyFooter.vue'
export default {
name:'App',
components:{MyHeader,MyList,MyFooter},
data() {
return {
todos: [
{id:'001', title:'抽烟',done:true},
{id:'002', title:'喝酒',done:false},
{id:'003', title:'开车',done:true}
]
}
},
methods: {
addTodo(todoObj) {
this.todos.unshift(todoObj)
},
//勾选or取消勾选一个todo
checkTodo(id){
this.todos.forEach((todo)=>{
if(todo.id === id) todo.done = !todo.done
})
},
//删除一个todo
deleteTodo(id){
this.todos = this.todos.filter( todo => todo.id !== id )
}
}
}
script>
<style>
...
style>
// components/MyList.vue
<template>
<ul class="todo-main">
<MyItem
v-for="todoObj in todos"
:key="todoObj.id"
:todo="todoObj"
:checkTodo="checkTodo"
:deleteTodo="deleteTodo"
/>
ul>
template>
<script>
import MyItem from './MyItem'
export default {
name:'MyList',
components:{MyItem},
//声明接收App传递过来的数据,其中todos是自己用的,checkTodo和deleteTodo是给子组件MyItem用的
props:['todos','checkTodo','deleteTodo']
}
script>
<style scoped>
...
style>
// components/MyFooter.vue
<template>
<div class="todo-footer" v-show="total">
<label>
<input type="checkbox" v-model="isAll"/>
label>
<span>
<span>已完成{{doneTotal}}span> / 全部{{todos.length}}
span>
<button class="btn btn-danger" @click="clearAll">清除已完成任务button>
div>
template>
<script>
export default {
name:'MyFooter',
props:['todos'],
computed: {
//已完成数
doneTotal(){
//此处使用reduce方法做条件统计
/* const x = this.todos.reduce((pre,current)=>{
console.log('@',pre,current)
return pre + (current.done ? 1 : 0)
},0) */
//简写
return this.todos.reduce((pre,todo)=> pre + (todo.done ? 1 : 0) ,0)
}
}
}
script>
<style scoped>
/*footer*/
.todo-footer {
height: 40px;
line-height: 40px;
padding-left: 6px;
margin-top: 5px;
}
.todo-footer label {
display: inline-block;
margin-right: 20px;
cursor: pointer;
}
.todo-footer label input {
position: relative;
top: -1px;
vertical-align: middle;
margin-right: 5px;
}
.todo-footer button {
float: right;
margin-top: 5px;
}
style>
// components/MyFooter.vue
<template>
<div class="todo-footer" v-show="total">
<label>
<input type="checkbox" v-model="isAll"/>
label>
<span>
<span>已完成{{doneTotal}}span> / 全部{{total}}
span>
<button class="btn btn-danger" @click="clearAll">清除已完成任务button>
div>
template>
<script>
export default {
name:'MyFooter',
props:['todos','checkAllTodo','clearAllTodo'],
computed: {
//总数
total(){
return this.todos.length
},
//已完成数
doneTotal(){
//此处使用reduce方法做条件统计
/* const x = this.todos.reduce((pre,current)=>{
console.log('@',pre,current)
return pre + (current.done ? 1 : 0)
},0) */
//简写
return this.todos.reduce((pre,todo)=> pre + (todo.done ? 1 : 0) ,0)
},
//控制全选框
isAll:{
//全选框是否勾选
get(){
return this.doneTotal === this.total && this.total > 0
},
//isAll被修改时set被调用
set(value){
this.checkAllTodo(value)
}
}
},
methods: {
/* checkAll(e){
this.checkAllTodo(e.target.checked)
} */
//清空所有已完成
clearAll(){
this.clearAllTodo()
}
},
}
script>
<style scoped>
...
style>
// App.vue
<template>
<div id="root">
<div class="todo-container">
<div class="todo-wrap">
<MyHeader :addTodo="addTodo"/>
<MyList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo"/>
<MyFooter :todos="todos" :checkAllTodo="checkAllTodo" :clearAllTodo="clearAllTodo"/>
div>
div>
div>
template>
<script>
import MyHeader from './components/MyHeader'
import MyList from './components/MyList'
import MyFooter from './components/MyFooter.vue'
export default {
name:'App',
components:{MyHeader,MyList,MyFooter},
data() {
return {
//由于todos是MyHeader组件和MyFooter组件都在使用,所以放在App中(状态提升)
todos:[
{id:'001',title:'抽烟',done:true},
{id:'002',title:'喝酒',done:false},
{id:'003',title:'开车',done:true}
]
}
},
methods: {
//添加一个todo
addTodo(todoObj){
this.todos.unshift(todoObj)
},
//勾选or取消勾选一个todo
checkTodo(id){
this.todos.forEach((todo)=>{
if(todo.id === id) todo.done = !todo.done
})
},
//删除一个todo
deleteTodo(id){
this.todos = this.todos.filter( todo => todo.id !== id )
},
//全选or取消全选
checkAllTodo(done){
this.todos.forEach((todo)=>{
todo.done = done
})
},
//清除所有已经完成的todo
clearAllTodo(){
this.todos = this.todos.filter((todo)=>{
return !todo.done
})
}
}
}
script>
<style>
...
style>
## 总结TodoList案例
1. 组件化编码流程:
(1).拆分静态组件:组件要按照功能点拆分,命名不要与html元素冲突。
(2).实现动态组件:考虑好数据的存放位置,数据是一个组件在用,还是一些组件在用:
1).一个组件在用:放在组件自身即可。
2). 一些组件在用:放在他们共同的父组件上(<span style="color:red">状态提升span>)。
(3).实现交互:从绑定事件开始。
2. props适用于:
(1).父组件 ==> 子组件 通信
(2).子组件 ==> 父组件 通信(要求父先给子一个函数)
3. 使用v-model时要切记:v-model绑定的值不能是props传过来的值,因为props是不可以修改的!
4. props传过来的若是对象类型的值,修改对象中的属性时Vue不会报错,但不推荐这样做。