title: Vue 3 Composition API - How to get the component element ($el) on which component is mounted
body: <p>I want to use <code>onMounted</code> to initiate third-party library. To do that I need the component element as its context. In Vue 2 I would get it with <code>this.$el</code> but not sure how to do it with composition functions. <code>setup</code> has two arguments and none of them contains the element.</p>
  
  <pre><code>setup(props, context) {
      onMounted(() =&gt; {
          interact($el)
              .resizable();
      })
  }
  </code></pre>