Vue.js ⚡️ Eventos - Enviar e Escutar

[Vue.js]_event-emit-on.js

new Vue({
  el: '#app',
  data: {
    votes: 0
  },
  methods:
  {
    vote: function(writer) {
      this.$emit('voted')
    },
  },
  created() {
    this.$on('voted', function(button) {
      this.votes++
    })
  }
});

[Vue.js]event-emit-on.html

<div id="app">
    <h1> {{ votes }} </h1>
    <button @click="vote">Vote</button> 
</div>