实现效果
todolist
代码
1. main.js入口文件
//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),
beforeCreate() {
Vue.prototype.$bus = this
}
})
2. App.vue
<template>
<div id="root">
<div class="todo-container">
<div class="todo-wrap">
<HeaderInput @ReceiveAddTodo="ReceiveAddTodo" ></HeaderInput>
<TodoList :todos="todos" >
</TodoList>
<FooterTotal :todos="todos" @selectAllTodo="selectAllTodo" @clearAlll="clearAlll"></FooterTotal>
</div>
</div>
</div>
</template>
<script>
import HeaderInput from './components/HeaderInput.vue';
import TodoList from './components/TodoList.vue';
import FooterTotal from './components/FooterTotal.vue';
import pubsub from 'pubsub-js'
export default {
name:"App",
components:{
HeaderInput, TodoList, FooterTotal},
data(){
return{
todos:JSON.parse(localStorage.getItem("todos"))||[],
}
},
methods:{
//添加一个todo
ReceiveAddTodo(todo){
this.todos.unshift(todo)
},
//勾选一个todo
checkTodo(id){
this.todos.forEach((todo)=>{
if(todo.id===id) todo.done=!todo.done
})
},
//删除一个todo
deleteTodo(_,id){
if(confirm("确认删除吗？")){
this.todos = this.todos.filter((todo)=>{
return todo.id !== id
})
}
},
//全选
selectAllTodo(checkValue){
if(checkValue){
this.todos.forEach(todo=>todo.done=true)
}else{
this.todos.forEach(todo=>todo.done=false)
}
},
//清除已选
clearAlll(){
if(confirm("确认要清除已完成的任务吗？")){
this.todos=this.todos.filter(todo=>todo.done!==true)
}
},
editTitle(id,value){
this.todos.forEach(todo=>{
if(todo.id===id) todo.title=value
})
}
},
watch:{
todos:{
deep:true,
handler(value){
localStorage.setItem("todos",JSON.stringify(value))
}
}
},
mounted(){
this.$bus.$on("checkTodo",this.checkTodo)
// this.$bus.$on("deleteTodo",this.deleteTodo)
this.pubId = pubsub.subscribe("delId",this.deleteTodo)
this.$bus.$on("editTitle",this.editTitle)
},
beforeDestroy(){
this.$bus.$off("checkTodo")
// this.$bus.$off("checkTodo","deleteTodo")
pubsub.unsubscrube(this.pubId)
}
}
</script>
<style>
/*base*/
body {
background: #fff;
}
.btn {
display: inline-block;
padding: 4px 12px;
margin-bottom: 0;
font-size: 14px;
line-height: 20px;
text-align: center;
vertical-align: middle;
cursor: pointer;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
border-radius: 4px;
}
.btn-edit {
color: #fff;
background-color: skyblue;
border: 1px solid rgb(117, 173, 196);
}
.btn-edit:hover {
color: #fff;
background-color: rgb(89, 147, 171);
}
.btn-danger {
color: #fff;
background-color: #da4f49;
border: 1px solid #bd362f;
}
.btn-danger:hover {
color: #fff;
background-color: #bd362f;
}
.btn:focus {
outline: none;
}
.todo-container {
width: 600px;
margin: 0 auto;
}
.todo-container .todo-wrap {
padding: 10px;
border: 1px solid #ddd;
border-radius: 5px;
}
</style>
3. 头部组件 HeaderInput.vue
<template>
<div class="todo-header">
<input type="text" placeholder="请输入你的任务名称，按回车键确认" @keyup.enter="addTodo" v-model.trim="title"/>
</div>
</template>
<script>
import {
nanoid} from "nanoid"
export default {
name:"HeaderInput",
data(){
return{
title:""
}
},
methods:{
addTodo(){
if(this.title==="") return alert("不能为空")
const todoObj = {
id:nanoid(),title:this.title,done:false};
this.$emit("ReceiveAddTodo",todoObj);
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>
4. 列表组件TodoList.vue
<template>
<ul class="todo-main">
<TodoItem
v-for="todo in todos"
:key="todo.id"
:todo="todo" >
</TodoItem>
</ul>
</template>
<script>
import TodoItem from './TodoItem.vue'
export default {
name:"TodoList",
components:{
TodoItem},
props:["todos"]
}
</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>
5. 列表item组件TodoItem.vue
<template>
<li>
<label>
<input type="checkbox" :checked="todo.done" @click="check(todo.id)"/>
<span v-show="!todo.isEdit">{
{todo.title}}</span>
<input type="text"
:value="todo.title"
v-show="todo.isEdit"
@blur="cancelBlur(todo,$event) "
ref='edit'
>
</label>
<button class="btn btn-danger" @click="delT(todo.id)">删除</button>
<button class="btn btn-edit" @click="editTodo(todo)" v-show="!todo.isEdit">编辑</button>
</li>
</template>
<script>
import pubsub from 'pubsub-js'
export default {
name:"TodoItem",
props:["todo"],
methods:{
check(id){
this.$bus.$emit("checkTodo",id)
},
delT(id){
// this.$bus.$emit("deleteTodo",id)
pubsub.publish("delId",id)
},
//编辑
editTodo(todo){
if(Object.prototype.hasOwnProperty.call(todo,"isEdit")){
todo.isEdit=true
}else{
this.$set(todo,"isEdit",true)
}
this.$nextTick(function(){
this.$refs.edit.select()
})
},
//失去焦点
cancelBlur(todo,e){
if(e.target.value.trim()===""){
alert("输入不能为空")
}else{
todo.isEdit=false
this.$bus.$emit("editTitle",todo.id,e.target.value.trim())
}
}
}
}
</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>
6. 底部组件FooterTotal.vue
<template>
<div class="todo-footer" v-show="todos.length">
<label>
<!-- <input type="checkbox" @change="selectAll" :checked="isAll"/> -->
<input type="checkbox" v-model="isAll"/>
</label>
<span>
<span>已完成{
{todoDone}}</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:"FooterTotal",
props:["todos"],
computed:{
todoDone(){
// let quantity=0
// this.todos.forEach(todo => {
// if(todo.done){
// quantity++
// }
// });
// return quantity
return this.todos.reduce((pre,todo)=>pre+(todo.done==true?1:0),0)
},
isAll:{
get(){
return this.todoDone==this.todos.length&&this.todos.length>0
},
set(value){
this.$emit("selectAllTodo",value)
}
}
},
data(){
return {
selectA:""
}
},
// methods: {
// selectAll(e){
// this.selectAllTodo(e.target.checked)
// }
// }
methods:{
clearAll(){
this.$emit("clearAlll")
}
}
}
</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>