title: Setting initial value of a Vuetify checkbox
body: <p>I have a Vue JS app that uses a Vuetify checkbox. I am unable to set the initial value to checked.</p>
  
  <pre><code>&lt;v-checkbox
    v-else-if="input.type == 'checkbox'"
      false-value="0"
      true-value="1"
      v-model="input.val"
      :error-messages="form.errors[field]"
  &gt;
  </code></pre>
  
  <p>When <code>input.val</code> is equal to <code>1</code> i expect the checkbox to start off checked. However the checkbox will not start off checked.</p>
  
  <p>I have also tried adding the props:</p>
  
  <blockquote>
  <pre><code>:value="input.val"
  :input-value="input.val"
  </code></pre>
  </blockquote>
  
  <p>None of these affect the starting state of the checkbox though. If <code>input.val</code> starts off as <code>1</code>, why does this box not start off checked?</p>
  
  <pre><code>&lt;v-checkbox
    v-else-if="input.type == 'checkbox'"
    false-value="0"
    true-value="1"
    :value="input.val"
    :input-value="input.val"
    v-model="input.val"
    :error-messages="form.errors[field]"
  &gt;
    &lt;template #label&gt;@{{ input.hint }}&lt;/template&gt;
  &lt;/v-checkbox&gt;
  </code></pre>