title: Laravel Jetstream Vue mixin route
body: <p>In a new Laravel project created by the installer with the Jetstream option <code>resources/js/app.js</code> has a line that reads:
  <code>Vue.mixin({ methods: { route } });</code></p>
  <p>PHPStorm reports that <code>route</code> is an unresolved variable or type. This happens, PHPStorm can be wrong. In a newly created application this does not cause an error.</p>
  <p>However, when I upgraded an existing project to Laravel 8.10.0 and installed Jetstream via composer this <strong>does</strong> cause and issue. When running this <code>npm run dev</code> does not error, but the browser will report <code>app.js:44258 Uncaught ReferenceError: route is not defined</code>.</p>
  <p>I can find no difference in <code>app.js</code> or <code>bootstrap.js</code> that would cause this. Where does this get imported or included so that I can check if it was done correctly in my upgrade?</p>