JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/0.12.7/vue.js"></script>
<script src="https://rawgit.com/vuejs/vue-validator/master/dist/vue-validator.js"></script>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<div id="app">
    <a class="btn btn-danger" href="javascript:" @click="add($event)">add</a>
</div>

JavaScript

var vue = new Vue({
    el: '#app',
   
    methods: {
        add(event) {
           	event.target.disabled = true
        }
    }
});