简单代码示例:

<script setup lang="ts">
interface IProps {
    height?: number;
}
// 默认props赋值
const props = withDefaults(defineProps<IProps>(), {
    height: 40,
})

const heightPx = `${props.height}px`
</script>

<template>
    <div class="home">
       home-1
    </div>
</template>

<style lang="scss">
.home {
   height: v-bind(heightPx);
}
</style>

1.在<script>标签定义xx变量

2.在<style lang="scss">使用:

v-bind(xx);