Loading.vue

<template>
  <div class="text-center">
    <v-overlay :value="visible">
      <v-progress-circular indeterminate size="64"></v-progress-circular>
    </v-overlay>
  </div>
</template>

<script>
export default {
  props: {
    visible: {
      type: Boolean,
      required: true
    }
  }
};
</script>