diff --git a/vue-cli-01-a-new-vue-project/src/components/FriendContact.vue b/vue-cli-01-a-new-vue-project/src/components/FriendContact.vue
index 0efdacc..3111f11 100644
--- a/vue-cli-01-a-new-vue-project/src/components/FriendContact.vue
+++ b/vue-cli-01-a-new-vue-project/src/components/FriendContact.vue
@@ -27,12 +27,9 @@ export default {
             required: true,
         },
         isFavorite: {
-            type: String,
+            type: Boolean,
             required: false,
-            default: "0",
-            validator: function(value) {
-                return value === "0" || value === "1";
-            },
+            default: false,
         },
     },
     data() {
@@ -50,7 +47,7 @@ export default {
             }
         },
         isFavoriteText() {
-            if (this.friendIsFavorite === "1") {
+            if (this.friendIsFavorite) {
                 return "(Favorite)";
             } else {
                 return "";
@@ -62,11 +59,7 @@ export default {
             this.detailsAreVisible = !this.detailsAreVisible;
         },
         toggleFavorite() {
-            if (this.friendIsFavorite === "1") {
-                this.friendIsFavorite = "0";
-            } else {
-                this.friendIsFavorite = "1";
-            }
+            this.friendIsFavorite = !this.friendIsFavorite;
         },
     },
 };