<template>
  <view>
    <button @click="click" class="call-parent-btn">调用父组件事件</button>
  </view>
</template>

<script setup lang="uts">
const emit = defineEmits(['callback'])

const click = () => {
  emit('callback', `${Date.now()}`)
}

defineExpose({
  click
})
</script>