【童心飞扬】《歌唱祖国》- 《贝乐虎儿歌》

加林森 · 发表于 2022-5-29 20:58

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本帖最后由小九于 2022-5-29 21:29 编辑 <br /><br /><style>
.outer {
      left: -214px;
      width: 1024px;
      height: 640px;
      background: #ccc url('https://pic.imgdb.cn/item/62936cde09475431298e5a7c.jpg') no-repeat;
      cursor: pointer;
      position: relative;
}
.wrap { width: 60px; height: 60px;  box-reflect: right; -webkit-box-reflect: right; position: relative; }
.mama meter { width: 120px; height: 20px; position: relative; }
.wrap span { --ww: 6px; width: var(--ww); height: 60px; bottom: -6px; background-color: rgba(255,0,0,.6); display: inline-block; position: absolute; }
.wrap span:nth-child(2) { left: var(--ww); }
.wrap span:nth-child(3) { left: calc(var(--ww) * 2); }
.wrap span:nth-child(4) { left: calc(var(--ww) * 3); }
.wrap span:nth-child(5) { left: calc(var(--ww) * 4); }
.wrap span:nth-child(6) { left: calc(var(--ww) * 5); }
.wrap span:nth-child(7) { left: calc(var(--ww) * 6); }
.wrap span:nth-child(8) { left: calc(var(--ww) * 7); }
.wrap span:nth-child(9) { left: calc(var(--ww) * 8); }
.wrap span:nth-child(10) { left: calc(var(--ww) * 9); }
</style>

<div class="outer">
      <div class="mama">
            <div class="wrap"></div>
            <meter id="meter" value="0" min="0" max="100" low="33" high="66" optimum="70"></meter>
            <audio id="aud" src="http://www.kumeiwp.com/sub/filestores/2021/12/28/ddfe6735e8fc94086f125cff42be6b61.mp3" autoplay="autoplay" loop="loop"></audio>
      </div>
</div>

<script>

let mama = document.querySelector('.outer'), wrap = document.querySelector('.wrap'), aud = document.querySelector('#aud'), meter = document.querySelector('#meter');
let num = (min, max) => Math.floor(Math.random() * (max-min+1)) + min, prog = (tt, cc) => 100 * cc / tt;

Array.from({length: 10}).forEach((ele) => {
      ele = document.createElement('span');
      ele.className = 'sskey';
      ele.style.backgroundColor = `rgba(${num(0,255)},${num(0,255)},${num(0,255)},.95)`;
      wrap.appendChild(ele);
})

let sskey = document.querySelectorAll('.sskey');

mama.onclick = () => aud.paused ? aud.play() : aud.pause();

aud.addEventListener('timeupdate', () => {
      Array.from(sskey).forEach((ele) => {
            ele.style.height = num(20, 60) + 'px';
      })
      meter.value = prog(aud.duration, aud.currentTime);
})

</script>