monochromer

.logotype img {
    max-width: 100%;
}

var evt = new CustomEvent('popup:open', {
      bubbles: true,
      detail: 'здесь любые данные'
    });
    popupDOMElement.dispatchEvent(evt);

class Gallery {
  init() {
    popupDOMElement.addEventListener('popup:open', this.reInit.bind.this)
  }
}

<div class="slider">        
    <div class="img curry" style="display: block">1</div>
    <div class="img" style="display: none">2</div>
    <div class="img" style="display: none">3</div>
    <div class="img" style="display: none">4</div>
    <div class="img" style="display: none">5</div>
    <div class="img" style="display: none">6</div>    
</div>

.img[style],
.img.curry {
  display: block;
}

<audio>
  <source src="file.mp3" type="audio/mpeg">
  <source src="file.ogg" type="audio/ogg">
</audio>