Sun May 21 15:12:00 UTC 2023 inscode

src/App.vue

 <script setup>
-import parent from './page/parent.vue';
+import parent from './page/ziChuanFuVal/parent.vue';
+import watchEffect from './page/watchEffect/watchEffect.vue';
 </script>
 
 <template>
-  <parent></parent>
+  <!-- <parent></parent> -->
+  <watchEffect></watchEffect>
 </template>
 
 <style scoped>

src/page/watchEffect/watchEffect.vue

+<script setup>
+import { ref, watchEffect } from 'vue';
+const changeVal = ref(0);
+
+watchEffect(() => {
+    console.log("循环",changeVal.value);
+})
+
+const cs = () => {
+    changeVal.value = changeVal.value + 1;
+}
+</script>
+
+<template>
+<button @click="cs">点击循环</button>
+</template>
+
+<style scoped>
+</style>
\ No newline at end of file