title: is $event.target.value a javascript command or a vue.js command?
body: <p>I have this line in my vue.js application</p>
  
  <pre><code>&lt;input type="text" v-on:input="cssClass=$event.target.value"&gt;
  </code></pre>
  
  <p>I know that in javascript I can get event.target.value. I think that the above code is Vue.js specific code, but I'm not sure. Need confirmation. </p>