优化代码

src/render/App.vue

@@ -10,15 +10,13 @@
   </div>
 </template>
 
-<script lang="ts">
-import { ref, defineComponent } from 'vue'
+<script lang="ts" setup>
+import { ref } from 'vue'
 import FlagView from './components/FlagView.vue'
 import EarthView from './components/EarthView.vue'
 import SatelliteTableView from './components/SatelliteTableView.vue'
 import SatelliteSystemSelectView from './components/SatelliteSystemSelectView.vue'
 
-export default defineComponent({
-  setup () {
 const earthView                 = ref(null)
 const flagView                  = ref(null)
 const onSatelliteSystemChanged  = ss => {
@@ -28,11 +26,4 @@ export default defineComponent({
 const onTrackSatelliteSelected  = id => {
   if (earthView.value) earthView.value.trackSatellite(id)
 }
-
-    return { earthView, flagView, onSatelliteSystemChanged, onTrackSatelliteSelected }
-  },
-  components: {
-    FlagView, EarthView, SatelliteSystemSelectView, SatelliteTableView
-  }
-})
 </script>