-webkit-mask 遮罩巧用

亚伦影音工作室 发表于 2026-8-15 10:10

本帖最后由亚伦影音工作室于 2026-8-15 20:46 编辑 <br /><br /><style >
#papa {margin: 10px -420px;
width: 1468px;
height: 740px;
background:#000000 url('https://pic1.imgdb.cn/i/7NPy3POmEzF6MZFLOF9AnA.gif')no-repeat center / cover;
box-shadow: 0px 0px 0px 2px #cccccc, 0px 0px 0px 8px #880000;
position: relative;overflow: hidden;
z-index: 12345;
}
#vid1 {z-index:1;
   position: absolute;
   width: 100%;
   height: 100%;
top: 0px;
left: 400px;
   object-fit: cover;

}

#vid {z-index:2;
   position: absolute;
   width: 100%;
   height: 100%;
top: 0px;
left: 0px;
   object-fit: cover;

}

#box {width: 100%;position: absolute;top: 0px;left: -150px;z-index: 3;
height: 100%;-webkit-mask: url(https://pic1.imgdb.cn/i/0347KGPAbXdohcbPtf6xi3.png)no-repeat center/100% 100%;}

#lrc {
   --state: paused;
   --motion: cover2;
   --tt: 2s;
   --bg: linear-gradient(0deg, #ff0000, #ff0000, #ff0000);
   position: absolute;z-index: 26;
   left: 52%;
   transform: translate(-50%);
   top: 40px;
   font:normal 3em 华文新魏;
   font-weight:400;
   color: #000080;
   white-space: pre;
   -webkit-background-clip: text;
   filter:drop-shadow(#FFFFFF 1px 0 0)drop-shadow(#FFFFFF 0 1px 0)drop-shadow(#FFFFFF -1px 0 0) drop-shadow(#FFFFFF 0 -1px0);
}
#lrc::before {
   position: absolute;
   content: attr(data-lrc);
   width: 20%;
   height: 100%;
   color: transparent;
   overflow: hidden;
   white-space: pre;
   background: var(--bg);

   -webkit-background-clip: text;
   animation: var(--motion) var(--tt) linear forwards;
   animation-play-state: var(--state);
}
@keyframes cover1{0% { width: 0%;}100% { width: 100%;}}
@keyframes cover2 { 0% { width: 0%;}100% { width: 100%;}}
</style >
<div id="papa">
<video id="vid1" src="https://img-baofun.zhhainiao.com/pcwallpaper_ugc/preview/4e3c9caa54b306cc26de6ae2f42bf834_preview.mp4" autoplay loop muted></video>
<div id="box"><video id="vid" src="https://img-baofun.zhhainiao.com/pcwallpaper_ugc/preview/541b741d43ee07016390054f248b2b0a_preview.mp4" autoplay loop muted></video></div>
<div id="lrc" data-lrc="遮罩巧用"title="歌词显示">遮罩巧用</div>
<audio id="aud" src="https://www.djdvd.com/plug/down.php?ac=music&lk=mp3&id=646e6433654868756141.mp3" autoplay loop></audio>
</div>
<script >
(function() {
/*原始lrc歌词*/
let lrcStr = ``;

/*变量：mKey - 当前歌词索引；mFlag ：调用关键帧动画索引；averAdd ：平均值补偿*/
let mKey = 0, mFlag = true, averAdd = 0.3;

/*函数：获取每句歌词用时，歌词用时若超过平均值则取平均值，最后一句歌词则取平均值*/
let lrcTime = (ar) => {
   let tmpAr = [];
   for(j = 0; j <ar.length - 1; j ++) {
            if(j !== ar.length - 1) tmpAr = parseFloat((ar - ar).toFixed(1));
   }
   let aver = parseInt(tmpAr.reduce((a,b) => a + b) / (tmpAr.length - 1)) + averAdd;
   tmpAr.push(aver);
   tmpAr.forEach((item,key) => {
            ar = item > aver ? aver : item;
   });
   return ar;
};

/*函数：从原始lrc歌词获取信息并存入 n*3 数组*/
let getLrcAr = (text) => {
   let lrcAr = [];
   let calcRule = ;
   for(x of text.split('\n')) {
            let ar = [];
            let re = /\d+[\.:]\d+([\.:]\d+)?/g;
            let geci = x.replace(re,'');
            if(geci) {
                     geci = geci.replace(/[\[\]\'\"\t,]s?/g,'');
                     let time = x.match(re);
                     if(time != null) {
                           for(y of time) {
                                    let tmp = y.match(/\d+/g);
                                    let sec = 0;
                                    for(z in tmp) sec += tmp * calcRule;
                                    ar = ;
                                    lrcAr.push(ar);
                           }
                     }
            }
   }
   lrcAr.sort((a,b)=> a - b);
   return(lrcTime(lrcAr));
};

/*函数：模拟显示同步歌词*/
let showLrc = (time) => {
   let name = mFlag ? 'cover1' : 'cover2';
   lrc.innerHTML = lrcAr;
   lrc.dataset.lrc = lrcAr;
   lrc.style.setProperty('--motion', name);
   lrc.style.setProperty('--tt', time + 's');
   lrc.style.setProperty('--state', 'running');
   mKey += 1;
   mFlag = !mFlag;
};

/*函数：处理当前歌词索引 mKey*/
let calcKey = () => {
   for (j = 0; j < lrcAr.length; j++) {
            if (aud.currentTime <= lrcAr) {
                     mKey = j - 1;
                     break;
            }
   }
   if (mKey < 0) mKey = 0;
   if (mKey > lrcAr.length - 1) mKey = lrcAr.length - 1;
   let time = lrcAr - (aud.currentTime - lrcAr);
   showLrc(time);
};

/*格式化时间信息*/
let toMin = (val) => {
   if (!val) return '00:00';
   val = Math.floor(val);
   let min = parseInt(val / 60),
   sec = parseFloat(val % 60);
   if (min < 10) min = '0' + min;
   if (sec < 10) sec = '0' + sec;
   return min + ':' + sec;
}

/*函数：关键帧动画状态切换*/
let mState = () => aud.paused ? (lrc.style.setProperty('--state','paused'),box.style.animationPlayState = 'paused') : (lrc.style.setProperty('--state','running'),box.style.animationPlayState = 'running');

/*监听播放进度*/
aud.addEventListener('timeupdate', () => {
   for (j = 0; j < lrcAr.length; j++) {
            if (aud.currentTime >= lrcAr) {
                     cKey = j;
                     if (mKey === j) showLrc(lrcAr);
                     else continue;
            }
   }
});
aud.addEventListener('pause', () => mState());/*监听暂停事件*/
aud.addEventListener('play', () => mState());/*监听播放事件*/
aud.addEventListener('seeked', () => calcKey());/*监听查询事件*/
let lrcAr = getLrcAr(lrcStr); /*获得歌词数组*/
})();
</script>
<script>
papa.onclick =function() { aud.paused ? ( aud.play(),vid.play(),vid1.play()):(aud.pause(),vid.pause(),vid1.pause())};
</script>

朵拉发表于 2026-8-15 23:20

漂亮的效果，欣赏学习咯{:4_204:}

杨帆发表于 2026-8-16 00:19

遮罩巧用，效果漂亮，谢谢亚伦老师精彩示范{:4_190:}

老谟深虑 发表于 2026-8-18 10:34

效果真的挺好，上午好！

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-webkit-mask 遮罩巧用