vue2 filter过滤器的使用
本章主要讲vue2的过滤器的使用
1.先介绍下vue1与vue2的filter区别，也就是vue2更新的地方
a: 2.0将1.0所有自带的过滤器都删除了，也就是说，在2.0中，要使用过滤器，则需要我们自己编写。
b: 2.0过滤器的传参方式不是以前的方式，是以函数传参的方式，下面示例（后面有具体示例）：
之前调用: {{msg | mimi \'12\' \'5\'}} 现在调用: {{msg | mimi(\'12\',\'5\')}}
c: 移除双向过滤器：
Vue.filter(\'change\', {
read: function (val) {
return val
},
write: function (val, oldVal) {
return isEmail(val) ? val : oldVal
}
})
2.组件内部过滤（此例子写法适用于处理数据显示的样式，不会改变原数据）
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>filter</title>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<ul>
<!--添加两个过滤器,注意不要冲突,注意先后顺序-->
<li v-for="item in list">{{item.id | filterAdd1 | filterAdd2}}</li>
</ul>
</div>
</body>
<script>
var vm = new Vue({
el:\'#app\',
data(){
return {
list:[
{"id":0,"title":"11111","cont":"111111"},
{"id":1,"title":"22222","cont":"111111"},
{"id":2,"title":"33333","cont":"111111"},
{"id":3,"title":"44444","cont":"111111"},
]
}
},
filters:{
filterAdd1(item) {
return item+10;
},
filterAdd2(item) {
return \'$\'+item;
}
},
methods:{
},
mounted(){
}
})
</script>
</html>
3.注册在全局的fliter，filter传值，filter动态传值
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>filter</title>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<ul>
<!--添加两个过滤器,注意不要冲突,注意先后顺序-->
<!-- 过滤传值，带引号的是字符串，不带是number,传的值可以动态绑定-->
<li v-for="item in list">{{item.id | filterAdd1(Number(input),20) | filterAdd2}}</li>
</ul>
<input type="text" placeholder="place" v-model="input">
</div>
</body>
<script>
Vue.filter(\'filterAdd1\', function (value,one,two) {
return value+one+two;//默认第一个参数就是默认要过滤的那个值
})
Vue.filter(\'filterAdd2\', function (value) {
return \'$\'+value;
})
var vm = new Vue({
el:\'#app\',
data(){
return {
input:5,
list:[
{"id":0,"title":"11111","cont":"111111"},
{"id":1,"title":"22222","cont":"111111"},
{"id":2,"title":"33333","cont":"111111"},
{"id":3,"title":"44444","cont":"111111"},
]
}
},
methods:{
},
mounted(){
}
})
</script>
</html>
结果：
4. 计算属性筛选，methods方法筛选
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<!-- <script src="vue.js"></script> -->
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<div @click="addMore">加载更多</div>
<ul><li v-for="item in filterlist">{{item}}</li></ul>
<hr>
<ul><li v-for="item in filterlistFun()">{{item}}</li></ul>
</div>
</body>
<script>
var vm = new Vue({
el:\'#app\',
data(){
return {
size:5,
list:[
{"id":0,"title":"11111","cont":"111111"},
{"id":1,"title":"22222","cont":"111111"},
{"id":2,"title":"33333","cont":"111111"},
{"id":3,"title":"44444","cont":"111111"},
{"id":4,"title":"55555","cont":"55555"},
{"id":5,"title":"66666","cont":"66666"},
{"id":6,"title":"77777","cont":"77777"},
{"id":7,"title":"77777","cont":"88888"},
{"id":8,"title":"888888","cont":"999999"},
{"id":9,"title":"000000","cont":"99999"},
{"id":10,"title":"a88888","cont":"99999"},
{"id":11,"title":"a22222","cont":"111111"},
{"id":12,"title":"a33333","cont":"111111"},
{"id":13,"title":"a44444","cont":"111111"},
{"id":14,"title":"a55555","cont":"55555"},
{"id":15,"title":"a66666","cont":"66666"},
{"id":16,"title":"a77777","cont":"77777"},
{"id":17,"title":"a77777","cont":"88888"},
{"id":18,"title":"a888888","cont":"999999"},
{"id":19,"title":"a000000","cont":"99999"},
{"id":20,"title":"a88888","cont":"99999"}
]
}
},
computed: {
filterlist () {
let num=this.size;
return this.list.filter(function (number) {
return number.id < num
})
}
},
methods:{
filterlistFun(val){
let num=this.size;
return this.list.filter(function (number) {
return number.id < num
})
},
addMore(){
this.size+=5;
},
},
mounted(){
}
})
</script>
</html>
以上是 vue2 filter过滤器的使用 的全部内容， 来源链接： utcz.com/z/379141.html
