title: What is the best way to declare global variables in Vue.js?
body: <p>I need access to my <code>hostname</code> variable in every component.</p>
  <p>Is it a good idea to put it inside <code>data</code>?</p>
  <p>Am I right in understanding that if I do so, I will able to call it everywhere with <code>this.hostname</code>?</p>