记事本功能
- 记事本有基本的增删改查等操作功能，输入框输入内容回车添加，每添加一条内容左下角就会增加一条记录
- 当想要删除一条内容时，鼠标放到内容上，就会出现一个删除箭头。右下角有个Clear按钮，点击后，记事本的全部内容都会被清除掉
1. 新增
2. 删除
3. 统计
4. 清空
5. 隐藏
<link rel="stylesheet" href="css/index.css" type="text/css">
<body>
<!-- 主体区域 -->
<section id="todoapp">
<!-- 输入框 -->
<header class="header">
<h1>小黑记事本</h1>
<input v-model="inputValue" @keyup.enter="add" autofocus="autofocus" autocomplete="off" placeholder="请输入任务"
class="new-todo" />
</header>
<!-- 列表区域 -->
<section class="main">
<ul class="todo-list">
<li class="todo" v-for="(item,index) in list">
<div class="view">
<span class="index">{{ index+1 }}.</span>
<label>{{ item }}</label>
<button class="destroy" @click="remove(index)"></button>
</div>
</li>
</ul>
</section>
<!-- 统计和清空 -->
<footer class="footer" v-show="list.length!=0">
<span class="todo-count" v-if="list.length!=0">
<strong>{{ list.length }}</strong> items left
</span>
<button v-show="list.length!=0" class="clear-completed" @click="clear">
Clear
</button>
</footer>
</section>
<!-- 底部 -->
<footer class="info">
<p>
<a href="http://www.itheima.com/"><img src="./img/black.png" alt="" /></a>
</p>
</footer>
<!-- 开发环境版本，包含了有帮助的命令行警告 -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
var app = new Vue({
el: "#todoapp",
data: {
list: ["每天", "一个", "小技巧"],
inputValue: "好好学习,天天向上"
},
methods: {
add: function () {
this.list.push(this.inputValue);
},
remove: function (index) {
console.log("删除");
console.log(index);
this.list.splice(index, 1);
},
clear: function () {
this.list = [];
}
},
})
</script>
</body>
