title: Property or method (...) is not defined on the instance but referenced during render
body: <blockquote>
    <p>"Property or method <strong>"show"</strong> is not defined on the instance but
    referenced during render. Make sure that this property is reactive,
    either in the data option, or for class-based components, by
    initializing the property"</p>
  </blockquote>
  
  <p>This is my code.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>&lt;script&gt;
  import { SlideYUpTransition } from 'vue2-transitions'
  
  export default {
    data: () =&gt; ({
      listitems: [{
          title: '출결관리',
          path: '/attendanceCheck'
        },
        {
          title: '학생관리',
          path: '/studentAdministration'
        },
        {
          title: '알림설정',
          path: '/notificationSetting'
        }
      ],
      components: {
        SlideYUpTransition
      },
      data() {
        return {
          show: true
        }
      }
    })
  }
  &lt;/script&gt;</code></pre>
  <pre class="snippet-code-css lang-css prettyprint-override"><code>&lt;style&gt;
  
  /*-- Contents --*/
  /* .content {
    width: 580px;
    padding: 20px;
    margin-bottom: 20px;
    float: left;
  } */
  
  
  @media ( max-width: 480px) {
    .container {
      width: auto;
    }
    .content {
      float: none;
      width: auto;
    }
  }
  &lt;/style&gt;</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;template&gt;
  
    &lt;!-- Contents ( Image, Notice ) --&gt;
    &lt;div class = "contents"&gt;
      &lt;section&gt;
          &lt;v-parallax src="/images/bg.png" height="650"&gt;&lt;/v-parallax&gt;
      &lt;/section&gt;
      &lt;slide-y-up-transition  &gt;
        &lt;div v-show="show"&gt;Your content here&lt;/div&gt;
      &lt;/slide-y-up-transition&gt;
    &lt;/div&gt;
  &lt;/template&gt;</code></pre>
  </div>
  </div>
  </p>