srcTodoList自定义事件
# 代码
# 代码路径
$ tree -N
.
├── App.vue
├── components
│ ├── MyFooter.vue
│ ├── MyHeader.vue
│ ├── MyItem.vue
│ └── MyList.vue
└── main.js
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# App.vue
<template>
<div id="app">
<div class="todo-container">
<div class="todo-wrap">
<!-- header -->
<MyHeader @addTodo="addTodo"></MyHeader>
<MyList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo"></MyList>
<MyFooter
:todos="todos"
@checkAllTodo="checkAllTodo"
@clearAllTodo="clearAllTodo">
</MyFooter>
</div>
</div>
</div>
</template>
<script>
import MyFooter from './components/MyFooter.vue'
import MyHeader from './components/MyHeader.vue'
import MyList from './components/MyList.vue'
export default {
name:'App',
components:{MyFooter,MyHeader,MyList},
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: {
// 添加一个todo
addTodo(todoObj){
// console.log('我是App，我接收到了数据：',x);
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 => {
return todo.id !== id
})
},
// 全选or取消全选
checkAllTodo(done){
this.todos.forEach(todo => {
todo.done = done
});
},
// 清除所有已完成的todo
clearAllTodo(){
this.todos = this.todos.filter((todo) =>{
return !todo.done
})
}
},
}
</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>
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# MyFooter.vue
<template>
<div class="todo-footer" v-show="total">
<label>
<!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> -->
<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'],
computed:{
total(){
return this.todos.length
},
doneTotal(){
// 第一种：使用遍历的方式
// let i = 0
// this.todos.forEach(todo => {
// if(todo.done){
// i++
// }
// });
// return i
// 第二种：使用 reduce 处理
// return this.todos.reduce((pre, todo) => pre+(todo.done ? 1 : 0), 0);
// 第三种：使用filter处理
const a = this.todos.filter(todo => {
return todo.done
});
return a.length
},
isAll:{
get(){
return this.total === this.doneTotal && this.total > 0
},
set(value){
// this.checkAllTodo(value)
this.$emit('checkAllTodo', value);
}
}
},
methods: {
clearAll(){
console.log('aaaa');
// this.clearAllTodo()
this.$emit('clearAllTodo')
}
// checkAll(e){
// this.checkAllTodo(e.target.checked)
// }
},
}
</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>
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# 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 {
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组件添加一个todo对象
this.$emit('addTodo',todoObj)
// 清空输入框
this.title=''
}
},
}
</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>
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# MyItem.vue
<template>
<li>
<label>
<input type="checkbox"
:checked="todo.done"
@change="changeTodo(todo.id)"/>
<span>{{todo.title}}</span>
</label>
<button class="btn btn-danger" @click="handlerTodo(todo.id)">删除</button>
</li>
</template>
<script>
export default {
name:'MyItem',
// 声明接收todo对象
props:['todo','checkTodo','deleteTodo'],
methods: {
// 勾选or取消勾选
changeTodo(id){
// 通知App组件将对应的todo对象的done值取反
this.checkTodo(id)
},
// 删除todo
handlerTodo(id){
if(confirm('确定删除吗？')){
this.deleteTodo(id)
}
}
},
}
</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: gray;
}
li:hover button{
display: block;
}
</style>
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# MyList.vue
<template>
<ul class="todo-main">
<MyItem
v-for="t in todos"
:key="t.id"
:todo="t"
:checkTodo="checkTodo"
:deleteTodo="deleteTodo"/>
</ul>
</template>
<script>
import MyItem from "./MyItem.vue";
export default {
name:'MyList',
components:{MyItem},
props:['todos','checkTodo','deleteTodo'],
}
</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>
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# main.js
import Vue from "vue"
import App from './App.vue'
Vue.config.productionTip = false
new Vue({
el: '#app',
components:{App},
render: h => h(App)
});
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上次更新: 2024/02/28, 13:00:35
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