vue isNumber

<input type="text" v-on:keypress="isNumber"/>
methods: {
     isNumber:function($event){
        let keyCode = ($event.keyCode ? $event.keyCode : $event.which);
        if ((keyCode < 48 || keyCode > 57) && keyCode !== 46) { // 46 is dot
            $event.preventDefault();
        }
     }

  },