两种方法：
1、通过 this.$slots.name
代码语言：javascript复制<div class="btn-icon" v-if="$slots.icon">
<slot name="icon"></slot>
</div>2、通过 useSlots 判断
代码语言：javascript复制<template>
<div>
<slot/>
<slot name="test"/>
<span v-if=slotTest>123</span>
</div>
</template>
<script lang="ts" setup>
import { useSlots } from "vue";
//判断<slot/>是否有传值
const slotDefault = !!useSlots().default;
//判断<slot name="test"/>是否有传值
const slotTest = !!useSlots().test;
</script>
