title: How can I disable literal values in Vuetify?
body: <p>I am having problems when using the "item-disabled" prop on the v-select component from vuetify. I am trying to use this with literal options.</p>
  
  <p>Here is the snippet which reproduces the issue:</p>
  
  <p>In this example I would like to disable the option "Buzz".</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>Vue.use(Vuetify)
  
  new Vue({
    el: '#app',
    data: () =&gt; ({
      items: ['Foo', 'Bar', 'Fizz', 'Buzz'],
      disabledItems: ['Buzz'],
    })
  })</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;link href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons" rel="stylesheet"&gt;
  &lt;link href="https://cdnjs.cloudflare.com/ajax/libs/vuetify/1.5.14/vuetify.min.css" rel="stylesheet" /&gt;
  &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js"&gt;&lt;/script&gt;
  &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/vuetify/1.5.14/vuetify.min.js"&gt;&lt;/script&gt;
  
  &lt;div id="app"&gt;
    &lt;v-app id="inspire"&gt;
      &lt;v-container fluid grid-list-xl&gt;
        &lt;v-layout wrap align-center&gt;
          &lt;v-flex xs12 sm6 d-flex&gt;
            &lt;v-select :items="items" :item-disabled="disabledItems" box label="Box style"&gt;&lt;/v-select&gt;
          &lt;/v-flex&gt;
        &lt;/v-layout&gt;
      &lt;/v-container&gt;
    &lt;/v-app&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <pre><code>&lt;v-select :items="items" :item-disabled="disabledItems"&gt;&lt;/v-select&gt;
  ...
  items: ['Foo', 'Bar', 'Fizz', 'Buzz'],
  disabledItems: ['Buzz'],
  </code></pre>
  
  <p>I do realize that I could use the non-literal key-value pair like in this example: <a href="https://codepen.io/anon/pen/joyoaj" rel="nofollow noreferrer">https://codepen.io/anon/pen/joyoaj</a> and it would work. But I would prefer to not have to write a wrapper component to convert literal options to key-value just to work around this.</p>
  
  <pre><code>&lt;v-select :items="items"&gt;&lt;/v-select&gt;
  ...
  items: [
    {text: 'Foo', value: 'Foo'}, 
    {text: 'Bar', value: 'Bar'}, 
    {text: 'Fizz', value: 'Fizz'}, 
    {text: 'Buzz', value: 'Buzz', disabled: true},
  ],
  </code></pre>
  
  <p>Does anyone know how to get disabling literal values working?</p>