张斯函：半城夏味

马黑黑 · 发表于 2024-1-4 17:42

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本帖最后由马黑黑于 2024-1-4 17:44 编辑

暂停&播放

马黑黑 · 发表于 2024-1-4 17:45

帖子代码

<style>
#papa { margin: 0 0 0 calc(50% - 593px); width: 1024px; height: 640px; background: url('https://638183.freep.cn/638183/t24/jpg/bixw.jpg') no-repeat center/cover; box-shadow: 3px 3px 20px #000; overflow: hidden; position: relative; z-index: 1; }
#papa:hover #wrap { opacity: .75; }
#papa:hover #vid { mix-blend-mode: screen; }
#wrap { position: absolute; left: 20px; bottom: 20px; padding: 10px; border: 1px solid tan; border-radius: 10px; background: #eee; box-shadow: 2px 2px 6px gray; font-size: 15px; opacity: 0.2; transition: opacity 1s; }
#wrap::before { position: absolute; left: 6px; top: 4px; content: '半城夏味'; }
#calcMsg { margin: 24px 0 8px 0; padding: 4px; height: 20px; background: white; font: normal 14px/20px sans-serif; overflow: hidden; }
#cBox { max-width: 126px; display: flex; gap: 2px; flex-wrap: wrap; }
#cBox span { display: grid; place-items: center; width: 30px; height: 30px; background: lightblue; border-radius: 50%; }
#btnPlay { margin: 10px 0 0 0; padding: 2px; text-align: center; cursor: pointer; border-radius: 10px; background: lightblue; }
#btnPlay:hover { color: red; }
#vid { position: absolute; width: 1180px; height: 640px; mix-blend-mode: darken; object-fit: cover; pointer-events: none; }
</style>
<div id="papa">
<audio id="aud" src="https://music.163.com/song/media/outer/url?id=547580245" autoplay loop></audio>
<video id="vid" src="https://img.tukuppt.com/video_show/2422006/00/02/12/5b51b120c01fa.mp4" loop muted></video>
<div id="wrap">
<div id="calcMsg"></div>
<div id="cBox"></div>
<div id="btnPlay">暂停&播放</div>
</div>
</div>
<script>
let charIdx = 0, equation = '', btns = [], timer;
let spans = ['0','1','2','3','4','5','6','7','8','9','.','=','+','-','*','/'];
spans.forEach((span,key) => {
let sp = document.createElement('span');
sp.innerText = span;
cBox.appendChild(sp);
btns.push(sp);
});
let mkequ = () => {
let operators = ['+','-','*','/'];
var n1 = Math.floor(Math.random() * 1000),
n2 = Math.floor(Math.random() * 1000),
operate = operators[Math.floor(Math.random() * 4)];
let res = parseFloat(eval(`${n1}${operate}${n2}`));
if(res.toString().indexOf('.') != -1) res = res.toFixed(2);
return `${n1}${operate}${n2}=${res}`;
};
equation = mkequ();
let update = () => {
let charNow = equation.charAt(charIdx);
calcMsg.innerText += charNow;
for(let j = 0; j < btns.length; j ++) {
if(btns[j].innerText === charNow) btns[j].style.background = 'pink';
}
charIdx ++;
if(charIdx > equation.length) {
calcMsg.innerText = '';
charIdx = 0;
equation = mkequ();
btns.forEach(elm => elm.style.background = 'lightblue');
}
timer = setTimeout(update,300);
};
let mState = () => {
aud.paused ?
(papa.style.setProperty('--state','paused'), timer = clearTimeout(timer), btnPlay.innerText = '播放', vid.pause()) :
(papa.style.setProperty('--state','running'), timer = setTimeout(update,300), btnPlay.innerText = '暂停', vid.play());
};
aud.addEventListener('playing', mState, false);
aud.addEventListener('pause', mState, false);
btnPlay.onclick = () => aud.paused ? aud.play() : aud.pause();
</script>