<div id="blog-posts-events-demo">
  <div :style="{ fontSize: postFontSize + 'em' }">
    <blog-post
      v-for="post in posts"
      v-bind:key="post.id"
      v-bind:post="post"
      v-on:enlarge-text="postFontSize += 0.1"
    ></blog-post>
  </div>
</div>
Vue.component('blog-post', {
  props: ['post'],
  template: `
    <div class="blog-post">
      <h3>{{ post.title }}</h3>
      <div v-html="post.content"></div>
      <button v-on:click="$emit('enlarge-text')">
        Enlarge text
      </button>
    </div>
  `
})

new Vue({
  el: '#blog-posts-events-demo',
  data: {
    posts: [
      {
      title: 'haha', content: 'this is haha'
      },
      {
      title: 'haha2', content: 'this is haha2'
      }
    ],
    postFontSize: 1
  }
})

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.21/vue.min.js