VueJs/vue-filters.html at master · Gabrielxp/VueJs · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <ul>
            <li v-for="usuario in usuarios">{{usuario.nome | truncate('10') }}</li>
        </ul>

        <input type="button" value="click" @click.prevent.stop="enviar()" >
    </div>

</body>
</html>


<script src="https://unpkg.com/vue"></script>
<script>
    var app = new Vue({
        el:"#app",
        data:{
            usuarios :[
                {nome:'joao'},
                {nome:'jose'},
                {nome:'maria'},
                {nome:'filpe'},
                {nome:'ana'}
            ]
        },

        filters:{
            toUpperCase(str,param1,param2){
                console.log('param1',param1);
                console.log('param2',param2);
                return str.toUpperCase();
            },

            truncate(str, lenght){
                var outout = str;
                if(output.lenght > lenght){
                    str.substring(0,lenght) + '...';
                }
                return str.substring(0,lenght);
            }
        },

        methods:{
            enviar(){
                alert('Enviado');
            }
        }
    })
</script>