Merge remote-tracking branch 'vue3-学习仓库/dev' into dev

src/components/Person.vue

@@ -11,7 +11,7 @@ let myName = computed({
     return firstName.value.slice(0,1).toUpperCase() + firstName.value.slice(1) + '-' + listName.value
   },
   set(setName){
-    const [val1,val2] = setName.split('-')
+    const [val1 = '',val2 = ''] = setName.split('-')
     firstName.value = val1
     listName.value = val2
   }