title: Change a layout variable value from a page in Nuxt.js
body: <p>There is something I really dont get about Vue / Nuxt, If I import a component in my /blog/slug.vue I am able to change the variables as I want but how I can do that I want to change something in the /layouts/default.vue ? I am able to do it with the  and the  by using <strong>head()</strong> but can I do that with a simple variable like {{ navbar_title }}  </p>
  
  <p>For example my /layouts/default.vue look like this : </p>
  
  <pre><code>&lt;template&gt;
    &lt;div class="navbar"&gt;
      {{ navbar_title }} 
    &lt;/div&gt;
  &lt;/template&gt;
  </code></pre>
  
  <p>Is it possible to can change {{ navbar_title }} value from a page like /pages/about.vue ?</p>