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vue3 todolist 简单例子

作者 : admin 本文共8753个字，预计阅读时间需要22分钟 发布时间： 2024-06-8 共6人阅读

vue3 简单的TodList
地址： http://gitee.com/cheng_yong_xu/vue3-composition-api-todo-app-my

效果
vue3 todolist 简单例子插图

step-1

初始化项项目
vue3 todolist 简单例子插图(1)
我们不采用vue cli 搭建项目

直接将上图文件夹，复制到vscode编辑器，清空App.vue的内容

安装包

# 安装包
npm i
# 启动
npm run serve

vue3 todolist 简单例子插图(2)

step-2

先写样式结构
vue3 todolist 简单例子插图(3)


<template>
<h1>ToDo App</h1>
<form>
<label for="">添加待办项</label>
<input type="text" name="newTodo" autocomplete="off" />
<button>添 加</button>
</form>
<h2>待办列表</h2>
<ul>
<li>
<span>代办列表</span>
<button>删 除</button>
</li>
</ul>
</template>
<script>
export default {}
</script>
<style lang="scss">
$size1: 6px;
$size2: 12px;
$size3: 18px;
$size4: 24px;
$size5: 48px;
$backgroundColor: #27292d;
$primaryColor: #EC23F3;
$secondTextColor: #1f2023;
$border: 2px solid rgba($color: white,
$alpha: 0.35,
);
$textColor: white;
$border_r: 2px solid red;
$border_y: 2px solid rgb(241, 229, 50);
$border_g: 2px solid rgb(50, 241, 50);
$border_w: 2px solid white;
body {
margin: 0;
padding: 0;
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
background-color: $backgroundColor;
color: $textColor;
#app {
max-width: 600px;
margin-left: auto;
margin-right: auto;
padding: 20px;
// border: $border_w;
h1 {
font-weight: bold;
font-size: 28px;
text-align: center;
// border: $border_r;
}
form {
display: flex;
flex-direction: column;
width: 100%;
label {
font-size: 14px;
font-weight: bold;
}
input,
button {
height: $size5;
box-shadow: none;
outline: none;
padding-left: $size2;
padding-right: $size2;
border-radius: $size1;
font-size: 18px;
margin-top: $size1;
margin-bottom: $size2;
transition: all 0.2s ease-in-out;
/* 添加过渡效果，使变化平滑 */
}
input {
background-color: transparent;
border: $border;
color: inherit;
}
input:hover {
border: 2px solid rgb(236, 35, 243);
}
button {
cursor: pointer;
background-color: rgb(236, 35, 243);
border: 1px solid $primaryColor;
font-weight: bold;
color: white;
border-radius: $size1;
}
}
h2 {
// border: $border_g;
font-size: 22px;
border-bottom: $border;
padding-bottom: $size1;
}
ul {
padding: 10px;
li {
display: flex;
justify-content: space-between;
align-items: center;
border: $border;
padding: 10px;
border-radius: $size1;
margin-bottom: $size2;
span {
cursor: pointer;
}
button {
cursor: pointer;
font-size: $size2;
background-color: rgb(236, 35, 243);
border: 1px solid $primaryColor;
font-weight: bold;
color: white;
padding: 5px 15px;
border-radius: $size1;
}
}
}
}
}
</style>

step-3

双向绑定数据

<!-- src\App.vue -->
<template>
<h1>ToDo App</h1>
<form @submit.prevent="addTodo()">
<label for="">添加待办项</label>
<input type="text" name="newTodo" autocomplete="off" v-model="newTodo"/>
<button>添 加</button>
</form>
<h2>待办列表</h2>
<ul>
<li>
<span>代办列表</span>
<button>删 除</button>
</li>
</ul>
</template>
<script>
import {ref } from 'vue';
export default {
name: 'App',
setup(){
const newTodo = ref('');
function addTodo(){
if(newTodo.value){
console.log(newTodo.value);
}
}
return {
newTodo,
addTodo
}
}
}
</script>

vue3 todolist 简单例子插图(4)

step-4

定义数据并将数据变成响应式的
将数据持久化到本地

定义数据并将数据变成响应式的


<script>
import { ref } from 'vue';
export default {
name: 'App',
setup() {
const newTodo = ref('');
const defaultData = ref([
{
done: false,
content: '今天要学习Vue'
}
]);
const todos = ref(defaultData);
function addTodo() {
if (newTodo.value) {
todos.value.push({
done: false,
content: newTodo.value
})
}
console.log(todos.value)
}
return {
newTodo,
addTodo
}
}
}
</script>

vue3 todolist 简单例子插图(5)

将数据持久化到本地

<script>
import { ref } from 'vue';
export default {
name: 'App',
setup() {
const newTodo = ref('');
const defaultData = ref([
{
done: false,
content: '今天要学习Vue'
}
]);
const todos = ref(defaultData);
function addTodo() {
if (newTodo.value) {
todos.value.push({
done: false,
content: newTodo.value
})
}
saveData()
console.log(sessionStorage.getItem('todos'))
}
function saveData () {
const storageData = JSON.stringify(todos.value)
sessionStorage.setItem('todos', storageData)
}
return {
newTodo,
addTodo
}
}
}
</script>

vue3 todolist 简单例子插图(6)

step-5

渲染待办列表

	<h2>待办列表</h2>
<ul>
<li v-for="(todo, index) in todos" :key="index">
<span>{{ todo.content }}</span>
<button>删 除</button>
</li>
</ul>

vue3 todolist 简单例子插图(7)
点击文字划横线
点击删除从待办列表移除

<!-- src\App.vue -->
<template>
<h1>ToDo App</h1>
<form @submit.prevent="addTodo()">
<label for="">添加待办项</label>
<input type="text" name="newTodo" autocomplete="off" v-model="newTodo" />
<button>添 加</button>
</form>
<h2>待办列表</h2>
<ul>
<li v-for="(todo, index) in todos" :key="index">
<span
:class="{ done: todo.done }"
@click="todo.done = !todo.done"
>{{ todo.content }}</span>
<button @click="removeTodo(index)">删 除</button>
</li>
</ul>
</template>
<script>
import { ref } from 'vue';
export default {
name: 'App',
setup() {
const newTodo = ref('');
const defaultData = ref([
{
done: false,
content: '今天要学习Vue'
}
]);
const todos = ref(defaultData);
function addTodo() {
if (newTodo.value) {
todos.value.push({
done: false,
content: newTodo.value
})
newTodo.value = ''
}
saveData()
console.log(sessionStorage.getItem('todos'))
}
function removeTodo(index) {
todos.value.splice(index, 1)
saveData()
}
function saveData() {
const storageData = JSON.stringify(todos.value)
sessionStorage.setItem('todos', storageData)
}
return {
newTodo,
todos,
addTodo,
removeTodo
}
}
}
</script>
<style lang="scss">
$size1: 6px;
$size2: 12px;
$size3: 18px;
$size4: 24px;
$size5: 48px;
$backgroundColor: #27292d;
$primaryColor: #EC23F3;
$secondTextColor: #1f2023;
$border: 2px solid rgba($color: white,
$alpha: 0.35,
);
$textColor: white;
$border_r: 2px solid red;
$border_y: 2px solid rgb(241, 229, 50);
$border_g: 2px solid rgb(50, 241, 50);
$border_w: 2px solid white;
body {
margin: 0;
padding: 0;
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
background-color: $backgroundColor;
color: $textColor;
#app {
max-width: 600px;
margin-left: auto;
margin-right: auto;
padding: 20px;
// border: $border_w;
h1 {
font-weight: bold;
font-size: 28px;
text-align: center;
// border: $border_r;
}
form {
display: flex;
flex-direction: column;
width: 100%;
label {
font-size: 14px;
font-weight: bold;
}
input,
button {
height: $size5;
box-shadow: none;
outline: none;
padding-left: $size2;
padding-right: $size2;
border-radius: $size1;
font-size: 18px;
margin-top: $size1;
margin-bottom: $size2;
transition: all 0.2s ease-in-out;
/* 添加过渡效果，使变化平滑 */
}
input {
background-color: transparent;
border: $border;
color: inherit;
}
input:hover {
border: 2px solid rgb(236, 35, 243);
}
button {
cursor: pointer;
background-color: rgb(236, 35, 243);
border: 1px solid $primaryColor;
font-weight: bold;
color: white;
border-radius: $size1;
}
}
h2 {
// border: $border_g;
font-size: 22px;
border-bottom: $border;
padding-bottom: $size1;
}
ul {
padding: 10px;
li {
display: flex;
justify-content: space-between;
align-items: center;
border: $border;
padding: 10px;
border-radius: $size1;
margin-bottom: $size2;
span {
cursor: pointer;
}
.done {
text-decoration: line-through;
}
button {
cursor: pointer;
font-size: $size2;
background-color: rgb(236, 35, 243);
border: 1px solid $primaryColor;
font-weight: bold;
color: white;
padding: 5px 15px;
border-radius: $size1;
}
}
}
h4 {
text-align: center;
opacity: 0.5;
margin: 0;
}
}
}
</style>

vue3 todolist 简单例子插图(8)

step-6

目前我们的数据虽然存在本地，但是我们使用的是内存中的数据，应该使用本地的数据
关闭浏览器再打开看到的还是和关闭之前一样的数据

<template>
<h1>ToDo App</h1>
<form @submit.prevent="addTodo()">
<label>New ToDo </label>
<input
v-model="newTodo"
name="newTodo"
autocomplete="off"
>
<button>Add ToDo</button>
</form>
<h2>ToDo List</h2>
<ul>
<li
v-for="(todo, index) in todos"
:key="index"
>
<span
:class="{ done: todo.done }"
@click="doneTodo(todo)"
>{{ todo.content }}</span>
<button @click="removeTodo(index)">Remove</button>
</li>
</ul>
<h4 v-if="todos.length === 0">Empty list.</h4>
</template>
<script>
import { ref } from 'vue';
export default {
name: 'App',
setup () {
const newTodo = ref('');
const defaultData = [{
done: false,
content: 'Write a blog post'
}]
const todosData = JSON.parse(localStorage.getItem('todos')) || defaultData;
const todos = ref(todosData);
function addTodo () {
if (newTodo.value) {
todos.value.push({
done: false,
content: newTodo.value
});
newTodo.value = '';
}
saveData();
}
function doneTodo (todo) {
todo.done = !todo.done
saveData();
}
function removeTodo (index) {
todos.value.splice(index, 1);
saveData();
}
function saveData () {
const storageData = JSON.stringify(todos.value);
localStorage.setItem('todos', storageData);
}
return {
todos,
newTodo,
addTodo,
doneTodo,
removeTodo,
saveData
}
}
}
</script>
<style lang="scss">
$border: 2px solid
rgba(
$color: white,
$alpha: 0.35,
);
$size1: 6px;
$size2: 12px;
$size3: 18px;
$size4: 24px;
$size5: 48px;
$backgroundColor: #27292d;
$textColor: white;
$primaryColor: #a0a4d9;
$secondTextColor: #1f2023;
body {
margin: 0;
padding: 0;
font-family: Avenir, Helvetica, Arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
background-color: $backgroundColor;
color: $textColor;
#app {
max-width: 600px;
margin-left: auto;
margin-right: auto;
padding: 20px;
h1 {
font-weight: bold;
font-size: 28px;
text-align: center;
}
form {
display: flex;
flex-direction: column;
width: 100%;
label {
font-size: 14px;
font-weight: bold;
}
input,
button {
height: $size5;
box-shadow: none;
outline: none;
padding-left: $size2;
padding-right: $size2;
border-radius: $size1;
font-size: 18px;
margin-top: $size1;
margin-bottom: $size2;
}
input {
background-color: transparent;
border: $border;
color: inherit;
}
}
button {
cursor: pointer;
background-color: $primaryColor;
border: 1px solid $primaryColor;
color: $secondTextColor;
font-weight: bold;
outline: none;
border-radius: $size1;
}
h2 {
font-size: 22px;
border-bottom: $border;
padding-bottom: $size1;
}
ul {
padding: 10px;
li {
display: flex;
justify-content: space-between;
align-items: center;
border: $border;
padding: $size2 $size4;
border-radius: $size1;
margin-bottom: $size2;
span {
cursor: pointer;
}
.done {
text-decoration: line-through;
}
button {
font-size: $size2;
padding: $size1;
}
}
}
h4 {
text-align: center;
opacity: 0.5;
margin: 0;
}
}
}
</style>
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