vue 指令 只限制数字

var app= new Vue({
    el: '#app',
    data: {
    },
    computed: {

    },
    directives: {
        numberOnly: {
            bind: function (el) {
                el.handler = function () {
                    el.value = el.value.replace(/\D+/, '')
                }
                el.addEventListener('input', el.handler)
            },
            unbind: function (el) {
                el.removeEventListener('input', el.handler)
            }
        }
    },
    methods: {
    }
   
});

驼峰 横杠