web0331/11.vue3/vue-project2/src/views/Mitt/Child1.vue

<template>
  <div>
    <h1>Child1</h1>
    <h3>{{ money }}元</h3>
    <button @click="sendMoney">分一半</button>
  </div>
</template>

<script lang="ts" setup>
import emitter from "@/utils/emitter";
import {ref,reactive} from "vue" 
let money = ref(1000);
function sendMoney() {
  emitter.emit('foo',money.value / 2)
}
</script>

<style lang="scss" scoped>
</style>