Vue自帶的過濾器

時間 2021-08-13

標籤 javascript html vue java git github api 數組 app less 欄目 JavaScript 简体版

原文原文鏈接

gitHub地址:https://github.com/lily1010/vue_learn/tree/master/lesson05javascript

一過濾器寫法html

{{ message | Filter}}vue

二 Vue自帶的過濾器:capitalizejava

功能:首字母大寫git

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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>

上面代碼輸出:Abcgithub

三 Vue自帶的過濾器:uppercaseapi

功能:所有大寫數組

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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>

上面代碼輸出:ABCapp

四 Vue自帶的過濾器:uppercaseless

功能:所有小寫

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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>

上面代碼輸出:abc

五 Vue自帶的過濾器:currency

功能:輸出金錢以及小數點

參數:

第一個參數 {String} [貨幣符號] - 默認值: '$'

第二個參數 {Number} [小數位] - 默認值: 2

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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}} <!--輸出$123.47-->
            {{message | currency '¥' "1"}} <!--輸出$123.5-->
        </div>
        <script type="text/javascript">
            var myVue = new Vue({
                el: ".test",
                data: {
                    message: "123.4673"
                }
            })
        </script>
    </body>
</html>

六 Vue自帶的過濾器:pluralize

功能: 若是隻有一個參數，複數形式只是簡單地在末尾添加一個「s」。若是有多個參數，參數被看成一個字符串數組，對應一個、兩個、三個…複數詞。若是值的個數多於參數的個數，多出的使用最後一個參數。

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

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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'}} <!--輸出: 1 item-->
        
            <ul v-for="item in lili">
                <li>
                    {{item}}    {{item | pluralize 'item'}} <!--輸出: 1    item 2    items 3    items-->
                </li>
            </ul>
            
            <ul v-for="item in lili">
                <li>
                    {{item}}    {{item | pluralize 'st' 'rd'}} <!--輸出: 1    st 2    rd 3    rd-->
                </li>
            </ul>
            
            <ul v-for="item in man">
                <li>
                    {{item}}    {{item | pluralize 'item'}} <!--輸出: 1    item 2    items 3    items-->
                </li>
            </ul>
            
            <ul v-for="item in man">
                <li>
                    {{item}}    {{item | pluralize 'st' 'rd'}} <!--輸出: 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自帶的過濾器:debounce

(1)限制：需在@裏面使用

(2)參數:{Number} [wait] - 默認值： 300

(3)功能：包裝處理器，讓它延遲執行 x ms，默認延遲 300ms。包裝後的處理器在調用以後至少將延遲 x ms，若是在延遲結束前再次調用，延遲時長重置爲 x ms。

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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">點擊我,我將10秒後消失</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自帶的過濾器:limitBy

(1)限制:需在v-for(即數組)裏面使用

(2)兩個參數:

第一個參數:{Number} 取得數量

第二個參數:{Number} 偏移量

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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"> <!--輸出1 2 3 4 5 6 7 8 9 10-->
                <li>{{item}}</li>
            </ul>
            <ul v-for="item in lili | limitBy 10 3"> <!--輸出 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自帶的過濾器:filterBy

(1)限制:需在v-for(即數組)裏面使用

(2)三個參數:

第一個參數: {String | Function} 須要搜索的字符串

第二個參數: in (可選,指定搜尋位置)

第三個參數: {String} (可選,數組格式)

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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' "> <!--輸出oi oa lo ouo oala-->
                <li>{{item}}</li>
            </ul>
            
            <ul v-for="item in man | filterBy 'l' in 'name' "> <!--輸出lily lucy-->
                <li>{{item.name}}</li>
            </ul>
            
            <ul v-for="item in man | filterBy 'l' in 'name' 'dada' "> <!--輸出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: [   //此處注意man是數組,不是對象
                    {name: "lily"},
                    {name: "lucy"},
                    {name: "oo"},
                    {dada: "lsh"},
                    {dada: "ofg"}
                    ]
                }
            })
        </script>
    </body>
</html>

十 Vue自帶的過濾器:orderBy

(1)限制:需在v-for(即數組)裏面使用

(2)三個參數:

第一個參數: {String | Array<String> | Function} 須要搜索的字符串

第二個參數: {String} 可選參數 order 決定結果升序（order >= 0）或降序（order < 0）,默認是升序

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Vue自帶的過濾器</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">
            <!--遍歷數組-->
            <ul v-for="item in lili | orderBy 'o' 1"> <!--輸出kk ll oi-->
                <li>{{item}}</li>
            </ul>
            
            <ul v-for="item in lili | orderBy 'o' -1"> <!--輸出oi ll kk-->
                <li>{{item}}</li>
            </ul>
            
            <!--遍歷含對象的數組-->
            <ul v-for="item in man | orderBy 'name' 1"> <!--輸出Bruce Chuck Jackie-->
                <li>{{item.name}}</li>
            </ul>
            
            <ul v-for="item in man | orderBy 'name' -1"> <!--輸出Jackie Chuck Bruce-->
                <li>{{item.name}}</li>
            </ul>
            
            <!--使用函數排序-->
            <ul v-for="item in man | orderBy ageByTen"> <!--輸出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: [   //此處注意man是數組,不是對象
                  {
                    name: 'Jackie',
                    age: 62
                  },
                  {
                    name: 'Chuck',
                    age: 76
                  },
                  {
                    name: 'Bruce',
                    age: 61
                  }
                ]
                },
                methods: {
                    ageByTen: function () {
                        return 1;
                    }
                }
            })
        </script>
    </body>
</html>