watcheffect-vue3.vue

<template>
  <div>
    <input type="text" v-model="name" />
  </div>
</template>

<script>
import { ref, watchEffect } from "vue";
export default {
  setup() {
    const name = ref('');
    watchEffect(() => {
      console.log(name.value);
    })
    return { name };
  }
};
</script>