vue教程2-06 过滤器
过滤器:
vue提供过滤器:
capitalize uppercase currency....
<div id="box">
{{msg|currency ￥}}
</div>
debounce 配合事件，延迟执行
<div id="box">
<input type="text" @keyup="show | debounce 2000">
</div>
数据配合使用过滤器:
limitBy 限制几个
limitBy 参数(取几个)
limitBy 取几个 从哪开始
<div id="box">
<ul>
<!--取2个-->
<li v-for="val in arr | limitBy 2">
{{val}}
</li>
<br/>
<br/>
<!--取2个，从第arr.length-2个开始取-->
<li v-for="val in arr | limitBy 2 arr.length-2">
{{val}}
</li>
</ul>
</div>
<script>
var vm=new Vue({
data:{
arr:[1,2,3,4,5]
},
methods:{
}
}).$mount('#box');
</script>
filterBy 过滤数据
filterBy ‘谁’
<div id="box">
<input type="text" v-model="a">
<ul>
<li v-for="val in arr | filterBy a">
{{val}}
</li>
</ul>
</div>
<script>
var vm=new Vue({
data:{
arr:['width','height','background','orange'],
a:''
},
methods:{
}
}).$mount('#box');
</script>
orderBy 排序
orderBy 谁 1/-1
1 -> 正序
2 -> 倒序
<div id="box">
<input type="text" v-model="a">
<ul>
<li v-for="val in arr | orderBy -1">
{{val}}
</li>
</ul>
</div>
<script>
var vm=new Vue({
data:{
arr:['width','height','background','orange'],
a:''
},
methods:{
}
}).$mount('#box');
</script>
自定义过滤器: model ->过滤 -> view
Vue.filter(name,function(input){
});
<div id="box"> {{a | toDou 1 2}} </div> <script> Vue.filter('toDou',function(input,a,b){ alert(a+','+b); return input<10?'0'+input:''+input; }); var vm=new Vue({ data:{ a:9 }, methods:{ } }).$mount('#box'); </script>
时间转化器
<div id="box"> {{a | date}} </div> <script> Vue.filter('date',function(input){ var oDate=new Date(input); return oDate.getFullYear()+'-'+(oDate.getMonth()+1)+'-'+oDate.getDate()+' '+oDate.getHours()+':'+oDate.getMinutes()+':'+oDate.getSeconds(); }); var vm=new Vue({ data:{ a:Date.now()//返回1970 年 1 月 1日午夜与当前日期和时间之间的毫秒数。 }, methods:{ } }).$mount('#box'); </script>
过滤html标记
双向过滤器:*
Vue.filter('filterHtml',{
read:function(input){ //model-view
return input.replace(/<[^<+]>/g,'');
},
write:function(val){ //view -> model
return val;
}
});
数据 -> 视图
model -> view
view -> model
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
</style>
<script src="vue.js"></script>
<script>
//<h2>welcome</h2>
Vue.filter('filterHtml',{
read:function(input){ //model-view
alert(1);
return input.replace(/<[^<]+>/g,'');
},
write:function(val){ //view -> model
console.log(val);
return val;
}
});
window.onload=function(){
var vm=new Vue({
data:{
msg:'<strong>welcome</strong>'
}
}).$mount('#box');
};
</script>
</head>
<body>
<div id="box">
<input type="text" v-model="msg | filterHtml">
<br>
{{msg | filterHtml}}
</div>
</body>
</html>