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[Java教程]Vue自带的过滤器

gitHub地址:https://github.com/lily1010/vue_learn/tree/master/lesson05

 

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>

上面代码输出: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>

上面代码输出: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>

上面代码输出: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>