How to acess url GET parameter in setup() Vue 3?

Question

This is my URL: http://localhost:8888/static/?foo=true via which Vue 3 application works.

In setup() I want to get foo parameter.

This is my code:

import { useRoute } from 'vue-router';
import { defineComponent, reactive, ref, Ref, watch, createApp, onMounted} from 'vue';

export default defineComponent({
  name: 'App',
  
  setup() {
    onMounted(() => {
        const route = useRoute();
        console.log(route);
        console.log(route.params.foo);
        console.log(route.query.foo);
    });
  },
})

And this is what I get:

Could anyone say how to do it?