title: Typescript in vue - Property 'validate' does not exist on type 'Vue | Element | Vue[] | Element[]'.
body: <p>I created <code>v-form</code> like this</p>
  
  <pre><code>&lt;v-form ref="form" v-model="valid" lazy-validation&gt;
    ...
    &lt;v-btn
       :disabled="!valid"
       @click="submit"
     &gt;
       submit
     &lt;/v-btn&gt;
  &lt;/v-form&gt;
  </code></pre>
  
  <p>script:</p>
  
  <pre><code>if (this.$refs.form.validate()) // Error is in here
  </code></pre>
  
  <p>If i just <code>console.log(this.$ref.form)</code> the validate() function is available. But why this error is coming while building?</p>