过滤器不改变原始数据，只是对数据进行加工处理后返回过滤后的数据再进行调用处理
过滤器简单实例--搜索页面
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>computed练习-搜索页面的实现</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<style type="text/css">
.container {
flex-direction: column;
width: 60%;
margin: 0 auto;
}
.inputbox {
width: 45%;
margin: 0 auto;
height: 30px;
border-radius: 10px;
}
.article {
display: flex;
height: 130px;
border: 1px solid darkgray;
border-radius: 8px;
margin-bottom: 8px;
align-items: center;
font-family: 华文行楷;
font-size: 20px;
}
.article-title {
flex: 1 1 80%;
margin-left: 10px;
}
.article-thumbnail {
flex: 1 1 20%;
}
.article-thumbnail img {
border-radius: 10px;
width: 80%;
height: 60%;
}
.sousuo {
color: white;
background-color: skyblue;
width: 100px;
height: 30px;
border-radius: 10px;
}
a {
text-decoration: none;
color: #333333;
}
a:hover {
text-decoration: underline;
}
</style>
</head>
<body>
<div id="app">
<div class="container">
<hr>
<input type="text" v-model="name" placeholder="请输入" class="inputbox" />
<button type="button" @click="search" class="sousuo">搜索</button>
<div class="article" v-for="article in filterArticles">
<a :href="article.url" class="article-title">
{{article.title}}
</a>
<div class="article-thumbnail">
<a :href="article.url">
<img :src="article.image">
</a>
</div>
</div>
</div>
</div>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
show: false,
name: '',
searchString: "",
articles: [{
"title": "堪称神器的3款在线工具，你一定用得上！",
"url": "https://www.jianshu.com/p/e83e7999346b",
"image": "https://img.haomeiwen.com/i11438996/56b25f32c9307b4b?imageMogr2/auto-orient/strip%7CimageView2/2/w/640/format/webp"
},
{
"title": "经典面试题：从 URL 输入到页面展现到底发生什么？",
"url": "https://www.jianshu.com/p/45ba3e0d0c7e",
"image": "https://img.haomeiwen.com/i3973862/d90954249a6f6ccd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1000/format/webp"
},
{
"title": "如何免翻墙使用谷歌搜索和Chrome应用商店",
"url": "https://www.jianshu.com/p/484f8e6c88f6",
"image": "https://img.haomeiwen.com/i858154/015a4b083685a3d1.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/800/format/webp"
},
{
"title": "四款前所未有好用的黑科技APP，绝对的良心实用，赶紧告诉家人",
"url": "https://www.jianshu.com/p/2aec84d269fe",
"image": "https://img.haomeiwen.com/i16042993/168b2cb17fd7ec0c?imageMogr2/auto-orient/strip%7CimageView2/2/w/640/format/webp"
},
{
"title": "坚持学英语的方法有哪些",
"url": "https://www.jianshu.com/p/0a6a61b0933c",
"image": "https://img.haomeiwen.com/i3525704/c7293758fc59e56b.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/960/format/webp"
}
]
},
methods: {
search: function() {
this.searchString = this.name;
}
},
computed: {
filterArticles: function() {
var filterArray = this.articles;
var searchString = this.searchString;
//若搜索关键词为空,则返回原始数据集
if (!searchString) {
return filterArray;
} else {
//去除一些无用空格,并转为小写
searchString = searchString.trim().toLowerCase();
//过滤数组内容
filterArray = filterArray.filter(function(article) {
//找到了标题含有searchString的文章
if (article.title.toLowerCase().indexOf(searchString) != -1) {
return article;
}
})
} //返回最终的过滤数组
return filterArray;
}
}
})
</script>
</body>
</html>
- 结果如下图所示：
结果是个短视频，由视频转成动态图片，我还不会，等我会了，我再补上
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