JSFiddle - React, Tailwind, and code Playground

HTML

<div id="app">
  <button class="my-btn" @click="increment">{{ val }}</button>
</div>

JavaScript

new Vue({
  el: '#app',
  data: {
    val: 1,
  },
  methods: {
  	increment() {
      fetch('/echo/html/').then((response) => {
      	this.val++;
      }).catch((error) => {
        console.log(error);
      });
    },
  },
});