use ??.

src/shared/Signup/index.vue

@@ -0,0 +1,16 @@
+<script setup lang="ts">
+import { useSignupStore } from "../../oj/stores/signup"
+const store = useSignupStore()
+</script>
+
+<template>
+  <el-dialog
+    :close-on-click-modal="false"
+    :close-on-press-escape="false"
+    v-model="store.visible"
+    title="注册"
+  >
+  </el-dialog>
+</template>
+
+<style scoped></style>