Vue

HTML

<div id="app">
  <input @keypress="preventNumericInput">
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

new Vue({
  el: "#app",
  methods: {
  	preventNumericInput ($event) {
    	console.log($event.keyCode); //will display the keyCode value

    	var keyCode = ($event.keyCode ? $event.keyCode : $event.which);
    	if (keyCode > 47 && keyCode < 58) {
        $event.preventDefault();
    	}
    }
  }
})