title: generate dynamic csrf-token for laravel SPA
body: <p>I'm using laravel 5.6 with axios and vue for my SPA web app.
  the problem is after a while the csrf token will expire so there should be an annoying prompt telling the user to refresh the page which is not what I'm looking for.
  so all I know about csrf token in laravel 5.6 is it's used in bootstrap.js in this way:</p>
  
  <pre><code>let token = document.head.querySelector('meta[name="csrf-token"]');
  
  if (token) {
     window.axios.defaults.headers.common['X-CSRF-TOKEN'] = token.content;
  } else {
    console.error('CSRF token not found: https://laravel.com/docs/csrf#csrf-x- 
    csrf-token');
  }
  </code></pre>
  
  <p>how I change this to get the csrf token on each request?</p>