<div @contextmenu.prevent="$refs.ctxMenu.open">
  ...
</div>

<context-menu id="context-menu" ref="ctxMenu">
  <li @click="doSomething(...)">option 1</li>
  <li class="disabled">option 2</li>
  <li>option 3</li>
</context-menu>

<script>
import contextMenu from 'vue-context-menu'
export default {
  name: 'my-component',
  components: { contextMenu },
  methods: { doSomething }
  ...
}
</script>