深入了解Vue自带的过滤器

互联网 20-10-21

过滤器是一个通过输入数据，能够及时对数据进行处理并返回一个数据结果的简单函数。Vue有很多很便利的过滤器，本文为大家介绍了vue自带的9种过滤器，希望对大家有一定的帮助。

一、过滤器写法

{{ message | Filter}}

二、Vue自带的过滤器:capitalize

功能:首字母大写

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">             {{message | capitalize}}         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     message: "abc"                 }             })         </script>     </body> </html>

代码输出:Abc

三、Vue自带的过滤器:uppercase

功能:全部大写

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">             {{message | uppercase}}         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     message: "abc"                 }             })         </script>     </body> </html>

代码输出:ABC

四、Vue自带的过滤器:uppercase

功能:全部小写

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">             {{message | lowercase}}         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     message: "ABC"                 }             })         </script>     </body> </html>

代码输出:abc

五、Vue自带的过滤器:currency

功能:输出金钱以及小数点

参数:

第一个参数 {String} [货币符号] - 默认值: '$'

第二个参数 {Number} [小数位] - 默认值: 2

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">             {{message | currency}} <!--输出$123.47-->             {{message | currency '¥' "1"}} <!--输出$123.5-->         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     message: "123.4673"                 }             })         </script>     </body> </html>

六、Vue自带的过滤器:pluralize

功能: 如果只有一个参数，复数形式只是简单地在末尾添加一个 “s”。如果有多个参数，参数被当作一个字符串数组，对应一个、两个、三个…复数词。如果值的个数多于参数的个数，多出的使用最后一个参数。

参数：{String} single, [double, triple, ...

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">         {{message}}    {{message | pluralize 'item'}} <!--输出: 1 item-->                      <ul v-for="item in lili">                 <li>                     {{item}}    {{item | pluralize 'item'}}                      <!--输出: 1  item 2    items 3    items-->                 </li>             </ul>                          <ul v-for="item in lili">                 <li>                     {{item}}    {{item | pluralize 'st' 'rd'}}                      <!--输出: 1    st 2    rd 3    rd-->                 </li>             </ul>                          <ul v-for="item in man">                 <li>                     {{item}}    {{item | pluralize 'item'}}                      <!--输出: 1    item 2    items 3    items-->                 </li>             </ul>                          <ul v-for="item in man">                 <li>                     {{item}}    {{item | pluralize 'st' 'rd'}}                      <!--输出: 1    st 2    rd 3    rd-->                 </li>             </ul>         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     message: 1,                     lili: [1,2,3],                     man: {                         name1: 1,                         name2: 2,                         name3: 3                     }                 }             })         </script>     </body> </html>

七、Vue自带的过滤器:debounce

(1)限制：需在@里面使用

(2)参数:{Number} [wait] - 默认值： 300

(3)功能：包装处理器，让它延迟执行 x ms，默认延迟 300ms。包装后的处理器在调用之后至少将延迟 x ms，如果在延迟结束前再次调用，延迟时长重置为 x ms。

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">           <button id="btn" @click="disappear | debounce 10000">点击我,我将10秒后消失</button>         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 methods: {                     disappear: function () {                        document.getElementById("btn").style.display= "none";                     }                 }             })         </script>     </body> </html>

八、Vue自带的过滤器:limitBy

(1)限制:需在v-for(即数组)里面使用

(2)两个参数:

第一个参数:{Number} 取得数量

第二个参数:{Number} 偏移量

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">             <ul v-for="item in lili | limitBy 10"> <!--输出1 2 3 4 5 6 7 8 9 10-->                 <li>{{item}}</li>             </ul>             <ul v-for="item in lili | limitBy 10 3">             <!--输出 4 5 6 7 8 9 10 11 12 13-->                 <li>{{item}}</li>             </ul>         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     lili: [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]                 }             })         </script>     </body> </html>

九、Vue自带的过滤器:filterBy

(1)限制:需在v-for(即数组)里面使用

(2)三个参数:

第一个参数: {String | Function} 需要搜索的字符串

第二个参数: in (可选,指定搜寻位置)

第三个参数: {String} (可选,数组格式)

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>         <div class="test">             <ul v-for="item in lili | filterBy 'o' "> <!--输出oi oa lo ouo oala-->                 <li>{{item}}</li>             </ul>                          <ul v-for="item in man | filterBy 'l' in 'name' "> <!--输出lily lucy-->                 <li>{{item.name}}</li>             </ul>                          <ul v-for="item in man | filterBy 'l' in 'name' 'dada' ">              <!--输出lily+undefined lucy+undefined undefined+lsh-->                 <li>{{item.name+"+"+item.dada}}</li>             </ul>         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     lili: ["oi", "oa", "ll", "lo" ,"ouo" ,"kk" ,"oala"],                     man: [   //此处注意man是数组,不是对象                     {name: "lily"},                     {name: "lucy"},                     {name: "oo"},                     {dada: "lsh"},                     {dada: "ofg"}                     ]                 }             })         </script>     </body> </html>

十、Vue自带的过滤器:orderBy

(1)限制:需在v-for(即数组)里面使用

(2)三个参数:

第一个参数: {String | Array<String> | Function} 需要搜索的字符串

第二个参数: {String} 可选参数 order 决定结果升序（order >= 0）或降序（order < 0）,默认是升序

<!DOCTYPE html> <html>     <head>         <meta charset="UTF-8">         <title>Vue自带的过滤器</title>         <meta name="viewport" content="width=device-width,initial-scale=1,         minimum-scale=1,maximum-scale=1,user-scalable=no" />         <script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>     </head>     <body>             <div class="test">             <!--遍历数组-->             <ul v-for="item in lili | orderBy 'o' 1"> <!--输出kk ll oi-->                 <li>{{item}}</li>             </ul>                          <ul v-for="item in lili | orderBy 'o' -1"> <!--输出oi ll kk-->                 <li>{{item}}</li>             </ul>                          <!--遍历含对象的数组-->             <ul v-for="item in man | orderBy 'name' 1"> <!--输出Bruce Chuck Jackie-->                 <li>{{item.name}}</li>             </ul>                          <ul v-for="item in man | orderBy 'name' -1"> <!--输出Jackie Chuck Bruce-->                 <li>{{item.name}}</li>             </ul>                          <!--使用函数排序-->             <ul v-for="item in man | orderBy ageByTen"> <!--输出Bruce Chuck Jackie-->                 <li>{{item.name}}</li>             </ul>         </div>         <script type="text/javascript">             var myVue = new Vue({                 el: ".test",                 data: {                     lili: ["oi", "kk", "ll"],                     man: [   //此处注意man是数组,不是对象                   {                     name: 'Jackie',                     age: 62                   },                   {                     name: 'Chuck',                     age: 76                   },                   {                     name: 'Bruce',                     age: 61                   }                 ]                 },                 methods: {                     ageByTen: function () {                         return 1;                     }                 }             })         </script>     </body> </html>

gitHub地址:https://github.com/manlili/vue