1、VmodelTest.vue

<template>
  <div @click="$emit('update:modelValue',modelValue+1)">counter:{{ modelValue }}</div>
</template>
<script>
export default {
  props: {
    modelValue: {
      type: Number,
      default: 1, 
    },
  },
};
</script>

2、use.vue

<template>
  <VmodeTest v-model="count"></VmodeTest>
</template>
<script>
import {
  ref,
} from "vue";
export default {
   setup() {
    const count = ref(1)
    return { count };
  },
}
};