vue-day16---watch与computed实现列表过滤

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>watch与computed实现列表过滤</title>
<script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
<div id="root">
<h2>人员列表</h2>
<input type="text" placeholder="请输入名字" v-model="keyWord" />

<ul>
<li v-for="(p,index) in fillterpersons" :key="index">
{{p.name}}-{{p.age}}-{{p.sex}}
</li>
</ul>
</div>

<script type="text/javascript">
//用watch 实现
// new Vue({
// el: "#root",
// data: {
// keyWord: "",
// persons: [
// { id: "001", name: "马冬梅", age: 19, sex: "女" },
// { id: "002", name: "周冬雨", age: 20, sex: "女" },
// { id: "003", name: "周杰伦", age: 21, sex: "男" },
// { id: "004", name: "温兆伦", age: 22, sex: "男" },
// ],
// fillterpersons: [],
// },

// watch: {
// keyWord: {
// immediate: true,
// handler(value) {
// this.fillterpersons = this.persons.filter((p) => {
// return p.name.indexOf(value) != -1;
// });
// },
// },
// },
// });

new Vue({
el: "#root",
data: {
keyWord: "",
persons: [
{ id: "001", name: "马冬梅", age: 19, sex: "女" },
{ id: "002", name: "周冬雨", age: 20, sex: "女" },
{ id: "003", name: "周杰伦", age: 21, sex: "男" },
{ id: "004", name: "温兆伦", age: 22, sex: "男" },
],
},

computed: {
fillterpersons() {
// 这个形式是缩写，当getter函数使用
// 初次读取的时候会调用一下，当依赖的数据发生变化时也会调用一下
return this.persons.filter((p) => {
// 这个return是filter规定的
// “abc”.indexOf('') 很特殊是 0
return p.name.indexOf(this.keyWord) != -1;
});
},
},
});

//用conputed 实现
</script>
</body>
</html>
posted @ 2023-07-15 19:19  雪落无痕1  阅读(31)  评论(0)    收藏  举报