Vue实现自带的过滤器实例
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>
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