VideoBackground.vue
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<!--
* @Date: 2025-12-26 14:15:46
* @LastEditors: hookehuyr hookehuyr@gmail.com
* @LastEditTime: 2025-12-31 16:47:19
* @FilePath: /mlaj/src/components/ui/VideoBackground.vue
* @Description: 文件描述
-->
<template>
<div class="video-background fixed inset-0 -z-10 overflow-hidden">
<video v-show="!use_image_bg" ref="videoPlayer" autoplay muted loop playsinline webkit-playsinline
preload="auto" @error="on_video_error" @stalled="on_video_error" @abort="on_video_error"
@emptied="on_video_error" @loadeddata="on_video_loaded" class="w-full h-full object-cover">
<source :src="videoUrl" type="video/mp4" />
Your browser does not support the video tag.
</video>
<!-- 图片降级背景（视频不可用时显示） -->
<div v-if="use_image_bg" class="w-full h-full bg-cover bg-center bg-no-repeat"
:style="{ backgroundImage: `url(${backgroundImage})` }">
</div>
<!-- 遮罩层，确保内容可读性 -->
<div class="absolute inset-0 bg-black/10"></div>
</div>
</template>
<script setup>
import { ref, onMounted } from 'vue'
/**
* 视频背景组件
* @description 循环播放指定的视频作为背景
*/
const props = defineProps({
videoUrl: {
type: String,
// default: 'https://cdn.ipadbiz.cn/mlaj/recall/video/%E5%AE%87%E5%AE%99-1.mp4'
default: 'https://cdn.ipadbiz.cn/mlaj/recall/video/u8yvl6rs7q.mp4'
},
backgroundImage: {
type: String,
// default: 'https://cdn.ipadbiz.cn/mlaj/recall/video/%E5%AE%87%E5%AE%99-2.png'
default: 'https://cdn.ipadbiz.cn/mlaj/recall/img/i3a85rdk.png'
}
})
const videoPlayer = ref(null)
const use_image_bg = ref(false)
const is_video_ready = ref(false)
onMounted(() => {
const video = videoPlayer.value
if (video) {
// 尝试播放视频
const playPromise = video.play()
if (playPromise !== undefined) {
playPromise.catch(error => {
// 自动播放被阻止：在微信环境下尝试通过 WeixinJSBridge 播放
// 说明：避免控制台输出引起诊断问题
void error
const ua = navigator.userAgent.toLowerCase()
if (ua.match(/MicroMessenger/i) && typeof window.WeixinJSBridge !== 'undefined') {
window.WeixinJSBridge.invoke('getNetworkType', {}, () => {
video.play()
})
}
// 若短时间内仍无法播放，降级为图片背景，避免黑屏
setTimeout(() => {
if (!is_video_ready.value) {
enable_image_fallback()
}
}, 1200)
})
}
// 监听微信JSBridgeReady事件
document.addEventListener('WeixinJSBridgeReady', () => {
video.play()
}, false)
}
// 兜底：在一定时间内仍未加载完成则切换到图片背景
setTimeout(() => {
if (!is_video_ready.value) {
enable_image_fallback()
}
}, 5000)
})
/**
* 视频加载成功回调
* 说明：标记视频已可播放，用于取消降级处理
*/
const on_video_loaded = () => {
is_video_ready.value = true
}
/**
* 视频错误回调
* 说明：视频加载/播放失败时触发图片降级，避免黑屏
* @param {Event} e 事件对象
*/
const on_video_error = (e) => {
void e
enable_image_fallback()
}
/**
* 启用图片降级背景
* 说明：切换到全屏图片背景，保证用户视觉不出现黑屏
*/
const enable_image_fallback = () => {
use_image_bg.value = true
}
</script>
<style scoped>
.video-background {
/* 确保在所有内容之下 */
z-index: -1;
top: -1px;
right: -1px;
bottom: -1px;
left: -1px;
background-image: url(https://cdn.ipadbiz.cn/mlaj/recall/img/bg01@2x.png?imageMogr2/thumbnail/400x/strip/quality/50);
}
</style>