transition文档地址 定义一个背景弹出层实现淡入淡出效果
代码语言：javascript复制<template>
<div>
<button @click="show = !show">
Toggle
</button>
<transition name="fadeBg">
<div class="bg" v-if="show">hello</div>
</transition>
</div>
</template>
<script>
export default {
data: () => ({
show: true
}),
};
</script>
<style lang="less" scoped>
.fadeBg-enter-active,
.fadeBg-leave-active {
transition: opacity 0.3s ease;
}
.fadeBg-enter,
.fadeBg-leave-to {
opacity: 0;
}
.bg {
position: fixed;
top: 20px;
left: 0;
z-index: 105;
width: 100%;
height: 100%;
background: rgba(0, 0, 0, 0.5);
}
</style>
