渲染功能：
1.提供数据： 提供在公共的父组件 App.vue
2.通过父传子，将数据传递给TodoMain
3.利用 v-for渲染
添加功能：
1.收集表单数据 v-model
2.监听事件（回车+点击都要添加）
3.子传父，讲任务名称传递给父组件 App.vue
4.进行添加 unshift（自己的数据自己负责）
5.清空文本框输入的内容
6.对输入的空数据 进行判断
删除功能
1.监听事件（监听删除的点击） 携带id
2.子传父，讲删除的id传递给父组件的App.vue
3.进行删除filter（自己的数据 自己负责）
底部合计：父传子 传list 渲染
清空功能：子传父 通知父组件 → 父组件进行更新
持久化存储：watch深度监视list的变化 -> 往本地存储 ->进入页面优先读取本地数据
App.vue
<template>
<!-- 主体区域 -->
<section id="app">
<TodoHeader @add="handleAdd"></TodoHeader>
<TodoMain :list="list" @handelDel="handelDel"></TodoMain>
<TodoFooter :list="list" @clear="handleClear"></TodoFooter>
</section>
</template>
<script>
import TodoFooter from "./components/TodoFooter.vue";
import TodoHeader from "./components/TodoHeader.vue";
import TodoMain from "./components/TodoMain.vue";
export default {
data() {
return {
list: JSON.parse(localStorage.getItem('list')) || [
{ id: 1, name: "打篮球" },
{ id: 2, name: "看电影" },
{ id: 3, name: "逛街" },
],
};
},
components: {
TodoFooter,
TodoHeader,
TodoMain,
},
methods:{
handleAdd(value){
this.list.unshift({
id : +new Date(),
name : value
})
},
handelDel(value){
this.list = this.list.filter(item =>item.id !== value)
},
handleClear(){
this.list = []
}
},
watch:{
list:{
deep : true,
handler(newValue){
localStorage.setItem('list',JSON.stringify(newValue))
}
}
}
};
</script>
<style>
</style>
components
TodoHeader
<template>
<header class="header">
<!-- 输入框 -->
<h1>小黑记事本</h1>
<input
@keyup.enter="add()"
placeholder="请输入任务"
class="new-todo"
v-model.trim="TodoName"
/>
<button @click="add()" class="add">添加任务</button>
</header>
</template>
<script>
export default {
data() {
return {
TodoName: "",
};
},
methods: {
add() {
if (!this.TodoName) {
alert("输入内容不能为空！");
return
}
this.$emit("add", this.TodoName);
this.TodoName = ''
},
},
};
</script>
<style>
</style>TodoMain
<template>
<!-- 列表区域 -->
<section class="main">
<ul class="todo-list">
<li class="todo" v-for="(item,index) in list" :key="item.id">
<div class="view">
<span class="index">{{index+1}}.</span> <label>{{item.name}}</label>
<button class="destroy" @click="del(item.id)"></button>
</div>
</li>
</ul>
</section>
</template>
<script>
export default {
props:{
list:Array
},
methods:{
del(id){
this.$emit('handelDel',id)
}
}
};
</script>
<style>
</style>TodoFooter
<template>
<!-- 统计和清空 -->
<footer class="footer">
<!-- 统计 -->
<span class="todo-count">合 计:<strong> {{list.length}} </strong></span>
<!-- 清空 -->
<button class="clear-completed" @click="clear">清空任务</button>
</footer>
</template>
<script>
export default {
props:{
list : Array
},
methods:{
clear(){
this.$emit('clear')
}
}
};
</script>
<style>
</style>main.js
import Vue from 'vue'
import App from './App.vue'
import './styles/index.css'
Vue.config.productionTip = false
new Vue({
render: h => h(App),
}).$mount('#app')
Styles
index.css
html,
body {
margin: 0;
padding: 0;
}
body {
background: #fff;
}
button {
margin: 0;
padding: 0;
border: 0;
background: none;
font-size: 100%;
vertical-align: baseline;
font-family: inherit;
font-weight: inherit;
color: inherit;
-webkit-appearance: none;
appearance: none;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
body {
font: 14px 'Helvetica Neue', Helvetica, Arial, sans-serif;
line-height: 1.4em;
background: #f5f5f5;
color: #4d4d4d;
min-width: 230px;
max-width: 550px;
margin: 0 auto;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
font-weight: 300;
}
:focus {
outline: 0;
}
.hidden {
display: none;
}
#app {
background: #fff;
margin: 180px 0 40px 0;
padding: 15px;
position: relative;
box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 25px 50px 0 rgba(0, 0, 0, 0.1);
}
#app .header input {
border: 2px solid rgba(175, 47, 47, 0.8);
border-radius: 10px;
}
#app .add {
position: absolute;
right: 15px;
top: 15px;
height: 68px;
width: 140px;
text-align: center;
background-color: rgba(175, 47, 47, 0.8);
color: #fff;
cursor: pointer;
font-size: 18px;
border-radius: 0 10px 10px 0;
}
#app input::-webkit-input-placeholder {
font-style: italic;
font-weight: 300;
color: #e6e6e6;
}
#app input::-moz-placeholder {
font-style: italic;
font-weight: 300;
color: #e6e6e6;
}
#app input::input-placeholder {
font-style: italic;
font-weight: 300;
color: gray;
}
#app h1 {
position: absolute;
top: -120px;
width: 100%;
left: 50%;
transform: translateX(-50%);
font-size: 60px;
font-weight: 100;
text-align: center;
color: rgba(175, 47, 47, 0.8);
-webkit-text-rendering: optimizeLegibility;
-moz-text-rendering: optimizeLegibility;
text-rendering: optimizeLegibility;
}
.new-todo,
.edit {
position: relative;
margin: 0;
width: 100%;
font-size: 24px;
font-family: inherit;
font-weight: inherit;
line-height: 1.4em;
border: 0;
color: inherit;
padding: 6px;
box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
box-sizing: border-box;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
.new-todo {
padding: 16px;
border: none;
background: rgba(0, 0, 0, 0.003);
box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
}
.main {
position: relative;
z-index: 2;
}
.todo-list {
margin: 0;
padding: 0;
list-style: none;
overflow: hidden;
}
.todo-list li {
position: relative;
font-size: 24px;
height: 60px;
box-sizing: border-box;
border-bottom: 1px solid #e6e6e6;
}
.todo-list li:last-child {
border-bottom: none;
}
.todo-list .view .index {
position: absolute;
color: gray;
left: 10px;
top: 20px;
font-size: 22px;
}
.todo-list li .toggle {
text-align: center;
width: 40px;
/* auto, since non-WebKit browsers doesn't support input styling */
height: auto;
position: absolute;
top: 0;
bottom: 0;
margin: auto 0;
border: none; /* Mobile Safari */
-webkit-appearance: none;
appearance: none;
}
.todo-list li .toggle {
opacity: 0;
}
.todo-list li .toggle + label {
/*
Firefox requires `#` to be escaped - https://bugzilla.mozilla.org/show_bug.cgi?id=922433
IE and Edge requires *everything* to be escaped to render, so we do that instead of just the `#` - https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7157459/
*/
background-image: url('data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23ededed%22%20stroke-width%3D%223%22/%3E%3C/svg%3E');
background-repeat: no-repeat;
background-position: center left;
}
.todo-list li .toggle:checked + label {
background-image: url('data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23bddad5%22%20stroke-width%3D%223%22/%3E%3Cpath%20fill%3D%22%235dc2af%22%20d%3D%22M72%2025L42%2071%2027%2056l-4%204%2020%2020%2034-52z%22/%3E%3C/svg%3E');
}
.todo-list li label {
word-break: break-all;
padding: 15px 15px 15px 60px;
display: block;
line-height: 1.2;
transition: color 0.4s;
}
.todo-list li.completed label {
color: #d9d9d9;
text-decoration: line-through;
}
.todo-list li .destroy {
display: none;
position: absolute;
top: 0;
right: 10px;
bottom: 0;
width: 40px;
height: 40px;
margin: auto 0;
font-size: 30px;
color: #cc9a9a;
margin-bottom: 11px;
transition: color 0.2s ease-out;
}
.todo-list li .destroy:hover {
color: #af5b5e;
}
.todo-list li .destroy:after {
content: '×';
}
.todo-list li:hover .destroy {
display: block;
}
.todo-list li .edit {
display: none;
}
.todo-list li.editing:last-child {
margin-bottom: -1px;
}
.footer {
color: #777;
padding: 10px 15px;
height: 20px;
text-align: center;
border-top: 1px solid #e6e6e6;
}
.footer:before {
content: '';
position: absolute;
right: 0;
bottom: 0;
left: 0;
height: 50px;
overflow: hidden;
box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), 0 8px 0 -3px #f6f6f6,
0 9px 1px -3px rgba(0, 0, 0, 0.2), 0 16px 0 -6px #f6f6f6,
0 17px 2px -6px rgba(0, 0, 0, 0.2);
}
.todo-count {
float: left;
text-align: left;
}
.todo-count strong {
font-weight: 300;
}
.filters {
margin: 0;
padding: 0;
list-style: none;
position: absolute;
right: 0;
left: 0;
}
.filters li {
display: inline;
}
.filters li a {
color: inherit;
margin: 3px;
padding: 3px 7px;
text-decoration: none;
border: 1px solid transparent;
border-radius: 3px;
}
.filters li a:hover {
border-color: rgba(175, 47, 47, 0.1);
}
.filters li a.selected {
border-color: rgba(175, 47, 47, 0.2);
}
.clear-completed,
html .clear-completed:active {
float: right;
position: relative;
line-height: 20px;
text-decoration: none;
cursor: pointer;
}
.clear-completed:hover {
text-decoration: underline;
}
.info {
margin: 50px auto 0;
color: #bfbfbf;
font-size: 15px;
text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
text-align: center;
}
.info p {
line-height: 1;
}
.info a {
color: inherit;
text-decoration: none;
font-weight: 400;
}
.info a:hover {
text-decoration: underline;
}
/*
Hack to remove background from Mobile Safari.
Can't use it globally since it destroys checkboxes in Firefox
*/
@media screen and (-webkit-min-device-pixel-ratio: 0) {
.toggle-all,
.todo-list li .toggle {
background: none;
}
.todo-list li .toggle {
height: 40px;
}
}
@media (max-width: 430px) {
.footer {
height: 50px;
}
.filters {
bottom: 10px;
}
}
