51工具盒子vue开发小应用：简易记事本功能。我们可以先看下效果图：
功能：
输入任务的时候，按回车，下面直接登记任务。我们可以选择删除或者清空，然后重新进行登记。
废话不多说，直接上DEMO：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>vue开发小应用：简易记事本功能 | Web前端之家https://www.jiangweishan.com/</title>
<style>
* {
margin: 0;
padding: 0;
}
#todoapp {
width: 600px;
background-color: rgba(19, 161, 114, 0.63);
font-family: sans-serif;
}
.header>h1 {
padding: 20px 0;
text-align: center;
font-size: 40px;
color: whitesmoke;
}
.newTask {
display: block;
width: 500px;
height: 50px;
line-height: 50px;
padding-left: 10px;
margin: 0 auto;
font-size: 20px;
outline: none;
border: none;
}
.todolist li {
height: 30px;
line-height: 30px;
padding-left: 15px;
margin: 10px 0;
font-size: 25px;
color: white;
}
.todolist .item {
margin-left: 15px;
}
.destroy,
.clear {
width: 50px;
height: 30px;
float: right;
color: white;
background-color: transparent;
border: none;
font-size: 20px;
}
.footer {
width: 600px;
height: 30px;
padding: 10px 0;
vertical-align: middle;
}
.footer p {
display: inline-block;
padding-left: 15px;
color: white;
font-size: 20px;
}
</style>
</head>
<body>
<section id="todoapp">
<header class="header">
<h1>记事本</h1>
<input type="text" v-model="newItem" class="newTask" placeholder="请输入任务" @keyup.enter="add">
</header>
<section>
<ul class="todolist">
<li v-for="(item, index) in list">
<div>
<span>{{ index + 1 }}</span>
<label class="item">{{ item }}</label>
<button class="destroy" @click="del(index)">删除</button>
</div>
</li>
</ul>
</section>
<footer class="footer">
<p class="count">
items: {{ list.length }}
</p>
<button class="clear" @click="clear" v-show="list.length != 0">清空</button>
</footer>
</section>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
<script>
const app = new Vue({
el: "#todoapp",
data: {
list: [],
newItem: ""
},
methods: {
add() {
if (this.newItem == "") {
return;
}
else {
if (!this.list.includes(this.newItem)) {
this.list.push(this.newItem);
this.newItem = "";
}
else {
alert("请勿添加重复事件！");
this.newItem = "";
}
}
},
del(index) {
this.list.splice(index, 1);
},
clear() {
this.list = [];
}
}
})
</script>
</body>
</html>
大家试试吧！
